XFGGGFFGDAAFDADDDDGAGAGGGAFAAGGFDAAAAFAFAAXFDAAGGAFADDGAADGGFDAGFXFDAAXAFAGXFDAGGGAFXAGGFAAAAGFAFFAGGDAADGDFAGGGAD

WE HOLD THESE TRUTHS TO BE SELF EVIDENT THAT ALL MEN ARE CREATED EQUAL


QRQCQSISLFLRZSBOAGPKQKWEVANLVPYJBUJNIRJRCHDRLIUD

WE SHALL FIGHT ON THE BEACHES AND WE SHALL NEVER SURRENDER


FPPYJUCROKXXRCXPDZBWPYAJCPVKCMRGLIDGAOQFOTZKHHVDN

ALL THAT GLITTERS IS NOT GOLD OFTEN HAVE YOU HEARD THAT TOLD


75 20 11 24 13 44 57 63 18 28 38 42 87 64 58 77 29 41 61 11 68 69 15 46 29 18 68 48 44 39 21 63 75 71 69 38 39 33 42 59 87 75 29 24 27 28 22 77 69 88 13 46 71 44 49 63 42 29 38 11 58 69 39 44 75 28 71 42 20 11 27 28 89 87 21 75 64 25 29 77 63 22 58 27 69 84 39 18 87 42 11 61 67 63 68 28 65 33 87 23 11 65 28 64 11 46 75 28 57 63 42 87 38 29 75 59 11 77 22 69 71 44 42 15 27 28 12 48 11 38 75 61 25 42 20 28 18 11 33 65 63 49 28 33 59 87 86 11 68 28 63 44 39 38 23 87 44 88 77 11 24 28 27 75 29 58 20 67 65 71 21 63 64 46 69 38 21 11 22 42 33

THE FUNDAMENTAL PROBLEM OF COMMUNICATION IS THAT OF REPRODUCING AT ONE POINT EITHER EXACTLY OR APPROXIMATELY A MESSAGE SELECTED AT ANOTHER POINT FREQUENTLY THE MESSAGES HAVE MEANING AND REFER TO PHYSICAL CONCEPTS


NCUNJREAAPCUQ


WDGIRSDIMXBKAIWQ


UNSOFAOHFXROUBLR


25 88 22 4 48 43 11 27 57 23 78 27 43 88 93 64 62 23 70 67 32 60 81 76 25 43 33 21 14 34 22 82 60 34 82 70 43 63 82 58 22 70 91 25 26 76 30 43 94 72 14 39 62 11 88 45 86 93 25 43 58 22 2 43 26 81 93 15 24 52 49 61 46 59 33 1 70 52 17 33 39 39 4 2 81 59 81 68 58 45 64 32 35 48 52 63 32 67 30 59 21 80 22 41 21 3 41 63 68 72 24 34 27 63 94 92 66 70 81 93 99 23 68 33 33 15 11 48 79 22 99 91 92 11 49 53 43 32 67 50 25 49 25 32 68 49 26 15 87 93 63 88 23 58 50 40 1 63 33 1 21 17 96 23 25 60 22 34 91 26 82 64 49 46 61 48 58 23 99 68 96 23 91 91 33 34

THE MESSAGE WAS HIDDEN BUT NOT SECURE A TRANSPARENT TOOL SHOULD SHOW ITS REASONING DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER

Homophonic substitution: each letter maps to multiple possible numbers.


5 21 18 5 11 1


FLBRLCIKHMRGUWICOIZOFWBWXTZDMJFVBKBVBUOUUVLWLNLMPVTZOKCNGMUDXFEGZMGKSXEMSBD

ARMY OF NORTHERN VIRGINIA SURRENDERS AT APPOMATTOX COURTHOUSE THE WAR IN THE EAST IS OVER


ICGZSSCUVKZBNACTEPLZQBHTKTNQSBXQEVDOCNSVXKJUYXBEWJPVGFSGPOTIPRZEGMPFFBQGH

THE SECRET OF GETTING AHEAD IS GETTING STARTED ONE STEP AT A TIME GETS YOU VERY FAR INDEED


REEYS AAREH TBCTH OPDRE HTSSI EEDLA SAPES TACAS PINTL TCEYS LROFS TLEMI TTONU BYSUL CEEHW EMAHR SPHVS IMXHO AXTTY THPUH BSIBE ITEAO RALEE LPECP ARSAI BDGLT RHEHN EPYET IIINC FPCTH CEHSI BBRAS ESLHA ACA

POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS ATBASH ENCODES BY REVERSING THE ALPHABET


sheol ytedy daiin oror oror kaiiin okedy oxed aiiin sharal otaiin okshy otol qokeedy okshy sharal shor otaiin otedy chedy okal shal otaiin qokeedy chol raiin otol otol sheol qokedy daiin chedal chedal choldaiin cheol sheol qokedy kaiiin otaiin shedy daral qokeedy oxed qotedy raiin sheedy

CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS

Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output.


845 812 813 851 999 852 812 865 825 812 866 999 802 839 811 999 851 814 845 853 842 809 862 806 826 803 826 835 824 858 873 999 837 800 857 858 813 851 999 824 841 999 852 813 854 814 802 851 806 822 999 858 866 842 999 854 850 862 802 852 814 999 806 826 845 821 812 853 999 812 839 806 853 873 846 857 854 999 811 824 818 853 800 845 821 854 999 866 826 857 821 999 858 867 842 999 847 844 833 872 803 826 861 855 999 802 833 846 823 802 804 813 858 854 999 831 814 851 806 831 821 842 816 817 854 999 847 851 824 841 806 826 845 835 813 999 854 802 874 855 999 857 822 813 999 856 874 856 858 814 836 999 837 860 856 857 999 803 813 999 856 813 807 860 852 813 999 812 864 812 841 999 826 816 999 812 839 813 838 874 999 831 841 844 867 856 999 801 835 818 844 853 824 858 822 837 999 806 833 801 855 855 825 808 800 834 999 806 824 847 822 812 851 855 999 858 813 800 807 822 999 868 822 873 999 837 844 811 813 853 839 999 856 812 806 861 852 826 858 874 999 838 801 858 858 814 852 855 999

PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS

Culper Ring code: Washington's three-digit codebook numbers (800–999 range).


RAD SAP EA XAHQP FTQ IADXP FTMF TQ SMHQ TUE AZXK EAZ FTMF ITAQHQD NQXUQHQE ETMXX ZAF BQDUET

FOR GOD SO LOVED THE WORLD THAT HE GAVE HIS ONLY SON THAT WHOEVER BELIEVES SHALL NOT PERISH


TICTRAOTTNTRSHGHHSEAAEVRSA


E+J++OCESABIL


AAAXAADXGAAXDXADAFDDGAXAAADADADFDGFGAFAAXADDAAGDAAGDAGAADAADGAGAGDADAXXDXDAAAXAGFGGGAADDFGDFAFXGXAGXDDDAADFFDDXGFDXGDGAAAGXAXAFAAFFAAAGGGXAGDDDAGXFX

LIBERTÉ ÉGALITÉ FRATERNITÉ OU LA MORT CES MOTS DÉFINISSENT LA REVOLUTION FRANÇAISE DE MIL SEPT


AHNLSNCNVSIAYTDNROLTWIILVNNVEBENEAVLSHNMDXOLRORMAVDISRNBFAENERTRUTOEKDOSARROERDRRRBYONCSPENTOGUENSNLUBDEUDSNADIIMAINUDOEGEEAWETBUNCEEESRTORTEUEINLSRONTOFLHGSOEEAFUIONENPIEF

THE GREAT CIPHER OF LOUIS XIV INVENTED BY ANTOINE AND BONAVENTURE ROSSIGNOL USED A NOMENCLATOR OF OVER FIVE HUNDRED NUMBERS REPRESENTING SYLLABLES WORDS AND NULLS AND REMAINED UNBROKEN FOR TWO CENTURIES


ZVOFNSTLEVKUSWFPPMPKMBQLEUALZRVVDGDLSWAQZVIHEHUHHCGLZCSVTWVZWBRZNMNS

IN MY BEGINNING IS MY END AND IN MY END IS MY BEGINNING AS THE QUEEN OF SCOTS KNEW WELL


CPLNFAJVXNBKSKFA


DUTLQTALBPWERJGGBRRFFDMPJAMTEKRICOBFEKIVCTAEBISFFGVZHFQYLHQLNJWLJWIXESAMKFNVEGKBHC

THE CIPHER DISK WAS INVENTED BY LEON BATTISTA ALBERTI A RENAISSANCE ARCHITECT AND GREAT HUMANIST


SHRALTIASOOMIOETUVLOEAEPSANBNITNAKDAGIEOTSWAAUSCEHNNSNRUNFITEYWDSMOIFEETFIRILNGTLNSFUTAW

IT IS A TRUTH UNIVERSALLY ACKNOWLEDGED THAT A SINGLE MAN IN POSSESSION OF A FORTUNE MUST BE IN WANT OF A WIFE


CFLSWBCMDLIPUFCV


K r· L K· Γ· ¬· L ─ L ┌· L r Γ· ┐· r· L ┌· X· X L X ⌐ ┌· L ┐· L ⌐ K Γ· ─ ¬· ┐ L ⌒· ⌒ ┘· ┌· Γ r └ ⌐ X X Γ· r ⌐ └ r Γ· ┐· r· L ┌· X K L ⌐ r r· ⌒ r· ⌒· ┌ ┘· Γ L ┌· ─ X L r X· ┌· Γ· K ⌒· ┌ ⌐ K K L ┌· X K r· L ⌐ ┌· r r· Γ· K L r K X· ┌· L X r· ┘· X· └ Γ ┌ ⌐ ┐ L ┌ Γ· X X· X L r· ⌐ ┌· Γ L ┌·

THE VIGENERE CIPHER USES A REPEATING KEYWORD CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS THE ARCHITECTURE SHOULD MAKE MISUSE HARDER

Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids.


90 78 19 91 90 70 69 54 88 91 90 31 45 30 76 19 91 90 24 87 72 31 70 58 91 90 24 32 91 90 77 30 91 90 76 19 10 28 91 90 30 29 89 62 19 46 31 91 90 24 45 11 31 91 90 27 54 10 91 90 55 30 66 91 90 11 53 19 91 90 47 87 30 27 24 19 88 91 90 30 36 33 11 54 91

WE HOLD THESE TRUTHS TO BE SELF EVIDENT THAT ALL MEN ARE CREATED EQUAL


r ┘· └ X· ┌ ─ ⌐ ┌· K ┌· ⌐ ─ X ┐· ┘· X Γ· K Γ· ┘· ─ ┌· L ⌐ Γ X r ┘· └ X· ┌ ─ X Γ· ─ ┐ L ⌒· ┘· ┌· Γ L ┌·

COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER


SNFJZULTENCSYUTZ


YWQIILMAGWECDPRZLLOEPEUWHHKTOESYEGNHRLERXUXUYNVAESHCCIKWBGBVRLSSTSVNGROUXP

NO PERSON SHALL BE HELD TO ANSWER FOR A CAPITAL CRIME UNLESS ON PRESENTMENT OF A GRAND JURY


QKTGFLMHVRZVBDEKKLA


MJOLISVJDLZPDDQZL


TYOMUGJDLOLYSMFTMDLG


1 14 1 6 6 9 14 5 3 9 16 8 5 18 1 16 16 12 9 5 19 1 12 9 14 5 1 18 6 21 14 3 20 9 15 14 20 15 5 1 3 8 12 5 20 20 5 18 1 20 2 1 19 8 5 14 3 15 4 5 19 2 25 18 5 22 5 18 19 9 14 7 20 8 5 1 12 16 8 1 2 5 20

AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER ATBASH ENCODES BY REVERSING THE ALPHABET

Aeneas Tacticus: Greek sequential-number cipher; A=1…Z=26.


TIGI SZXZ YDKC QPWE XVJN MZOQ UNKF AZSW JWWU IMUH GHGL SKYN PECL ETUD KJCH AQSO PRBQ KKFH NNAZ SQEU JHOF YPAT SPJN AXDR LBII BFLC SSGS IFZL LCBT SEOB IZFV CKDB PSEY V

THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES THE MESSAGE WAS HIDDEN BUT NOT SECURE THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT

Trithemius: progressive Caesar (shift = letter position); no key needed.


SVDV XNZB BRYY OVDW UIKF UKAX AGLF VWIW ZVIM SQRR FTDK DXNO AO

SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER


HTADDFDPXDCGDBEUIIO


87 24 25 53 44 57 66 25 16 41 22 57 69


NEPVRTLOTFIODEOOUEVSGCIVSEHAENSOGDBTCLURCEPETREAEEHLIVNLMWRTSTNSOASOEASHIVGATRAOI

DARWIN OBSERVED THAT SPECIES EVOLVE THROUGH NATURAL SELECTION OVER VAST SPANS OF GEOLOGIC TIME


GUR ZRFFNTR JNF UVQQRA OHG ABG FRPHER NYNA GHEVAT OEBXR RAVTZN JVGU PEVOF NAQ GUR OBZOR ZNPUVAR

THE MESSAGE WAS HIDDEN BUT NOT SECURE ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE

ROT-13 is Caesar with shift 13 — it is its own inverse.


63 09 14 06 09 14 09 20 25 61 02 05 25 15 14 04 60 06 18 15 14 20 09 05 18 62 08 21 13 01 14 11 14 15 23 12 05 04 07 05 03 01 12 12 19 63 05 01 03 08 07 05 14 05 18 01 20 09 15 14 01 14 05 23

TO INFINITY AND BEYOND THE FRONTIER OF HUMAN KNOWLEDGE CALLS TO EACH GENERATION ANEW


11 5 18 3 11 8 15 6 6 19 16 18 9 14 3 9 16 12 5 19 1 25 19 20 8 5 19 25 19 20 5 13 13 21 19 20 2 5 19 5 3 21 18 5 5 22 5 14 9 6 5 14 5 13 25 11 14 15 23 19 1 12 7 15 18 9 20 8 13 20 8 5 11 1 19 9 19 11 9 5 24 1 13 9 14 1 20 9 15 14 6 9 14 4 19 18 5 16 5 1 20 5 4 20 18 9 7 18 1 13 19 9 14 3 9 16 8 5 18 20 5 24 20 20 8 5 18 1 9 12 6 5 14 3 5 3 9 16 8 5 18 23 18 9 20 5 19 20 5 24 20 9 14 1 26 9 7 26 1 7 16 1 20 20 5 18 14

KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN


qokedy lkaiin qotedy sharal daiin aiiin okedy aiiin shor daiin rcheol otaiin daiin sheol cheol chor qokeedy dainy daiin ytedy oxed sheol daiin daral oror ypchol qokal lkaiin raiin okain dal ytaiin raiin oxed qokal shedy oror chol lkaiin shal ypchol otedy oror aiiin sheedy ytedy okshy daral kaiiin shal dal choldaiin kaiiin ytaiin shaiin okal okeedy otedy okal shor ctaiin ypchol okshy lkaiin okeedy kaiiin qotedy otaiin qokal chol sheedy dal

ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS


OBUARYDAEKTSDNUOTUUORNEONRSINHEYENTHLYWOFUYEERFOYLOMEFET

IF YOU KNOW BOTH YOURSELF AND YOUR ENEMY YOU NEED NOT FEAR THE RESULT


SBACRMGGTRSUMTRM


FHMUPHMFGMTKHIGDSBGSEATHRMLWCKGTRMCKCOZHOLATTGSPBMAFOUEFHFIYCKEOFURODDELTS

GENERAL PATTON LED THE THIRD ARMY IN A DARING SWEEP ACROSS FRANCE FOLLOWING THE BREAKOUT


UVAGXHIIYEAMXLLTZ


RVPUIUIFSBWFOOFWFSNPSFUIFCJSETBUPOUIFCVTUPGQBMMBTKVTUBCPWFNZDIBNCFSEPPS

QUOTH THE RAVEN NEVERMORE THE BIRD SAT ON THE BUST OF PALLAS JUST ABOVE MY CHAMBER DOOR


INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION THE MESSAGE WAS HIDDEN BUT NOT SECURE PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS

Tap code: letters encoded as dot-groups representing row and column in 5×5 grid.


GECAIFKEAXIWQVPPXZXVPQHMGCTTKPQVPPVCPUGDL

EN EL PRINCIPIO ERA EL VERBO Y EL VERBO ERA CON DIOS


GUS BAS GVZR COQ VF GUSBESGVQOYYL HANESOXONYS VS HFNR QBEENQGYL CHPYVQ VATEOFGEHQGHEN RRFSEISF NOENTHY RRFNTA VHZOA ESOROPYS BHGCHG FUBHYR FUBJ OYY ESOFBAVAT FGRCF GBROL

THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS TODAY

Porta: 13-row table polyalphabetic cipher; reciprocal (encrypt = decrypt).


DFRSSYKQETOYUYZCOWETSMNOOIRSACSDNSRYTGREDNDFTMDNDBSHGLDILW

FOUR SCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH THIS NATION


PZUULBGREKVWKUTNVBKPPMRSUCGVTVYRIMCTQTCUDUGEPFDCKZXLPHBGTRIYPJYNFJRBOAECDFYIPKCNDNZJKSIPCYVJINBXKFHWYVSXWMQCAGDHHCXUWCGYNMCCJQCPLQDQUEHCCVZRRPZSRWWOJELHIKLPZOOUNGGM

THE LORD IS MY SHEPHERD I SHALL NOT WANT HE MAKETH ME TO LIE DOWN IN GREEN PASTURES HE LEADETH ME BESIDE THE STILL WATERS HE RESTORETH MY SOUL HE LEADETH ME IN THE PATHS OF RIGHTEOUSNESS FOR HIS NAME SAKE


INAEYIODRSCNDIUFINTSRRDEXEEETODRQSNOFCLUIAYBEEECOMTNUXXTCTEI

INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION TODAY


46 80 87 29 60 57 49 76 55 50 80 46 69 76 95 37 88 78 48 60 95 56 66 58 56 80 67 59 59 49 86 86 64 39 97 56 77 97 55 59 59 65 75 69 65 50 69 59 79 78 76 56 70 65 55 67 54 30

IN THE BEGINNING WAS THE WORD AND THE WORD WAS WITH GOD AND FULL OF GRACE


99999 90011 90014 90014 90018 90004 99998 99999 90011 90008 90015 90018 99998 99999 90018 90008 90013 90010 99998 99999 90018 90007 90008 90015 90018 99998


WIIMOJIXZUXTIFLUPQEOVUEOZVUESYOFJUZKPWFYXOWUNRVWBTGTSGEHBVTHHGSSKBPYSHLSXI

THE LIGHT YOU SEE FROM DISTANT STARS LEFT THOSE SUNS THOUSANDS OF YEARS BEFORE YOUR BIRTH


CZKAVKALHURWXSZLJK


and into then about of tnsi water like most aeii call tell many into tnsu its give name first much line new which tnsi right have has


⟨w26⟩ ⟨w08⟩ ⟨w21⟩ ⟨a12⟩ ⟨a11⟩ ⟨a07⟩ ⟨w06⟩ ⟨a12⟩ ⟨w21⟩ ⟨a08⟩ ⟨w23⟩ ⟨w08⟩ ⟨w21⟩ ⟨w06⟩ ⟨a07⟩ ⟨a11⟩ ⟨w20⟩ ⟨a07⟩ ⟨a13⟩ ⟨w23⟩ ⟨w04⟩ ⟨a13⟩


WLFJHEUZLCAABJOQKOVRCFVJLTPPFCOJWNTTJOETWPSUKJZVMJGZEEONXTRQCQEIMAUTTUNVZD

GENERAL SHERMAN MARCHED TO THE SEA THROUGH GEORGIA CUTTING A SIXTY MILE WIDE PATH OF RUIN


1623 7003 01573 05659 7888 06036 07857 06014 6334 1601 4086 4470 1573 1655 01290 06062 0387 04445 2570 4769 04399 1640 5973 6303 06285 02512 05737 1655 0358 6347 04149 04742 01324 01604 3850 06289 2545 1599 3849 02849 0636 05671 00373 05677 7862 5024 5719 1588 5968 1591 05698 06952 01637 06064 3514 4459 4727 07260 03801 1611 1280 2276 01646 1926 4713 05722 6310 02545 01600 0991 04797 4167 04177 6631 04465 2914 6286 07893 04716 05113 01622 4453 06023 04734 6605 5720 01011 1668 6293 04754 04727 03834 5992 0392 03785 03854 04718 7280 2911 04409 1290 1650 5093 01608 4482 1307 01621 04467 6356 06923 01611 5677 2908 1942 2903 00969 0375 6367 02876 4771 04480

EVERY SYSTEM NEEDS AN HONEST THREAT MODEL THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION

Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher.


OMQEQQKAWTOKMRVF


PIUS ECFR UANC DPPW XSAB OIFI PFIB STBI EPUE SFCT RIKI ERPR PFID TIIB PNTW XTIP FFWE INFD XBIA VXXB IBSU NFCX TNAF XXAP IQGA NCTF WICE ACDC FPUX ASDT NEFE NTPG XPCF CXTE INBP UXAS DTPC TLIR XEBI E

SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY EVERY SYSTEM NEEDS AN HONEST THREAT MODEL GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER

Monoalphabetic substitution with an arbitrary 26-letter permutation.


LZWLWDWKUGHWJWNWSDK


65 37 59 99 44 48 54 27 86 77 25 49 55 56 59 57 28 39 63 24 77 96 25 58 43 27 58 79 35 30 43 33 98 86 48 50 54 35 79 86 57 69 52 46 57 79 47 37 56 46 56 78 35 36 63 47 89 68 38 59 33 45 59 86 44 29 33 43 78 88 48 59 46 27 68 86 28 27 65 64 56 86

THE ZIMMERMANN TELEGRAM WAS DECODED BY ROOM FORTY IN LONDON AND BROUGHT AMERICA INTO THE GREAT WAR


WITH MALICE TOWARD NONE WITH CHARITY FOR ALL WITH FIRMNESS IN THE RIGHT AS GOD GIVES US TO SEE THE RIGHT LET US STRIVE ON TO FINISH THE WORK WE ARE IN TO BIND UP THE NATIONS WOUNDS


BOVNXJJONPPLZUNSQVSFGGCGFHRJAZIMRYSRIDOFWRJPYNGNGWNZKYKDDTDLUMOKTFTMALBTGDVGLN

SCIENCE WITHOUT RELIGION IS LAME AND RELIGION WITHOUT SCIENCE IS BLIND SAID ALBERT EINSTEIN


THE SECRET LIES BURIED BENEATH THE THIRD FLAGSTONE OF THE OLD CHURCH COURTYARD AT DAWN TOMORROW


BLPGM DTYYP AQDCX AIIQV FCXPE AEKLN AYAAF KSRTL JZC

OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION

Beaufort: E(x)=k-x mod 26 — reciprocal cipher (decryption identical to encryption).


AMCQ XZXPVP LCAXS TDZYFU REQF BRJDV ESJ APN LZYOS BQTZBHZ DFQSOSKFEQ IPXQOCE NFT JVSVBZNP LNT QTRXJIAQXX OUSTXU RFW BZHIKZN JPWVTJBKNN AGOZXS BWR WMUMRNGSCSLD OU VRXPFRSC IVNXHOU PGW HVODR WKHLJLWQ BIIFLL LBJQIB RHPY DPQ XLIBYYUAU HJVHL

ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS


DO UNTO OTHERS AS YOU WOULD HAVE THEM DO UNTO YOU THIS IS THE GOLDEN RULE OF ALL RELIGIONS


20 8 5 13 5 19 19 1 7 5 23 1 19 8 9 4 4 5 14 2 21 20 14 15 20 19 5 3 21 18 5 20 8 5 2 9 6 9 4 3 9 16 8 5 18 3 15 13 2 9 14 5 19 1 16 15 12 25 2 9 21 19 19 17 21 1 18 5 23 9 20 8 20 18 1 14 19 16 15 19 9 20 9 15 14 16 15 12 25 1 12 16 8 1 2 5 20 9 3 3 9 16 8 5 18 19 21 19 5 13 21 12 20 9 16 12 5 1 12 16 8 1 2 5 20 19 8 9 6 20 19

THE MESSAGE WAS HIDDEN BUT NOT SECURE THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS


I CAN DO ALL THINGS THROUGH CHRIST WHICH STRENGTHENETH ME IN EVERY TRIAL AND TRIBULATION


VOZDPMMVHJBWJUBMVHSNZZPGVIJLCPNAOWYVZGNVSPLVRKWOAHLEASFGZZVNGMVHWVTRTHKZZH

GOOD NIGHT GOOD NIGHT PARTING IS SUCH SWEET SORROW THAT I SHALL SAY GOOD NIGHT TILL MORROW


AWKXNPPHANOATLC


OURL EETK PUSE SIHH NRTT TATH POCX SFYT OERB LCOT CXBU TIDE ERTX AESE PRNA EOXM FKEL SXRI EITE AWAC IXSN YMWN XLRE LSHF TE

BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER


BPM NCVLIUMVBIT XZWJTMU WN KWUUCVQKIBQWV QA BPIB WN ZMXZWLCKQVO IB WVM XWQVB MQBPMZ MFIKBTG WZ IXXZWFQUIBMTG I UMAAIOM AMTMKBML IB IVWBPMZ XWQVB NZMYCMVBTG BPM UMAAIOMA PIDM UMIVQVO IVL ZMNMZ BW XPGAQKIT KWVKMXBA

THE FUNDAMENTAL PROBLEM OF COMMUNICATION IS THAT OF REPRODUCING AT ONE POINT EITHER EXACTLY OR APPROXIMATELY A MESSAGE SELECTED AT ANOTHER POINT FREQUENTLY THE MESSAGES HAVE MEANING AND REFER TO PHYSICAL CONCEPTS


ATTCRAGQXMBGTBFFEWNYEMINBCZACZOTFQISDFTGOMKJDILLPNKRHDFADPTIYVURAIAMNYTRPMV

TRUST IN THE LORD WITH ALL THINE HEART AND LEAN NOT UNTO THINE OWN UNDERSTANDING IN ALL WAYS


GWJESC+UHPKIAWAPXTOMJPXNZOKTJBIHA+S++NPLHSQGRVNOFWJUZFMUCYLMFREOSRMJDUS

NEITHER HEIGHT NOR DEPTH NOR ANYTHING ELSE IN ALL CREATION WILL BE ABLE TO SEPARATE US


VMMNCZUFIVXTASLL


NFUGAPFSVWBWPAJTEKXPLMFSANEFSVTXBHSNUIAGSWEMGAXFALMFSPBDWNRUDUGVEHNDTAPBDSSALMDAEEIJSEMLEINBN

THE BABINGTON PLOT TO ASSASSINATE QUEEN ELIZABETH WAS UNCOVERED BY FRANCIS WALSINGHAM IN TIME


XZ JQLEE WNTQG VY GQZ IZLFQZJ LYC XZ JQLEE YZAZM JDMMZYCZM

WE SHALL FIGHT ON THE BEACHES AND WE SHALL NEVER SURRENDER


OANINBTPEIESXGOR


IDCAQWQYRI


RBBFNLHDFCLUKGTKZNPENALMCVOFDUXDRJWUCSUANQTZSARBKLPRRSGVVOULFDNMAWTU

ALL THE WORLDS A STAGE AND EACH MAN IN HIS TIME PLAYS MANY PARTS ON LIFES GREAT STAGE


PDPHFUGFGNPHSX


HONORABOVEALL


LPAPVNVEYKKJOMF


SRXYUSUFWKCKXMFEEBAXPNVTNHKPOSSUTNIAFFIVZEZDBBUUHNUIVLGYSRRGMVZSNXPXJINQITVULRV

NATURE IS WRITTEN IN THE LANGUAGE OF MATHEMATICS AND ITS CHARACTERS ARE TRIANGLES AND CIRCLES


DLER NEGU NMDC IMDY NNES GEDU FAPP ITNE KSER FNUT NYES ESNE IIBO ESRA YABX ENLG TIER WGUX ATIR EXCE OETX NRCA ETIP RWNX DOKP NHPE DAOX HDEH SEHA TSTX EUYY EVET HHSX LCCI VIRI EIEX

DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX THE VIGENERE CIPHER USES A REPEATING KEYWORD THE MESSAGE WAS HIDDEN BUT NOT SECURE

Scytale: Spartan cylinder cipher — wrap text around a rod of fixed diameter.


ABORTMISSIONNOW


shaiin sheedy shedy oror kaiiin otedy dal qotedy chedy chedal daiin otain dal daiin ypchol ykcheol ykcheol choldaiin okeedy qokedy ytedy chedal dal chol dal shedy qokeedy okeedy otain okedy daral okain okeedy kaiiin okain chor lkaiin

THE MESSAGE WAS HIDDEN BUT NOT SECURE THE ARCHITECTURE SHOULD MAKE MISUSE HARDER A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG


15 16 5 14 19 15 21 18 3 5 20 15 15 12 19 1 12 12 15 23 9 14 4 5 16 5 14 4 5 14 20 22 5 18 9 6 9 3 1 20 9 15 14 20 8 5 1 18 3 8 9 20 5 3 20 21 18 5 19 8 15 21 12 4 13 1 11 5 13 9 19 21 19 5 8 1 18 4 5 18 20 8 5 1 21 20 15 11 5 25 3 9 16 8 5 18 5 24 20 5 14 4 19 20 8 5 11 5 25 23 9 20 8 20 8 5 16 12 1 9 14 20 5 24 20 9 20 19 5 12 6

OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION THE ARCHITECTURE SHOULD MAKE MISUSE HARDER THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF


105 178 180 149 137 159 173 165


WETC JDIEAO TLWDQG KLKO WETC ACDQETY NLQ DII WETC NEQJKOSS EK TCO QEBCT DS BLG BEVOS US TL SOO TCO QEBCT IOT US STQEVO LK TL NEKESC TCO WLQH WO DQO EK TL REKG UM TCO KDTELKS WLUKGS

WITH MALICE TOWARD NONE WITH CHARITY FOR ALL WITH FIRMNESS IN THE RIGHT AS GOD GIVES US TO SEE THE RIGHT LET US STRIVE ON TO FINISH THE WORK WE ARE IN TO BIND UP THE NATIONS WOUNDS


WIL BCTLYU QCW MLELJXWLM WC WIL SQHWLM UWXWLU PR WIL OCQUWHWSWHCQ XYL YLULYZLM WC WIL UWXWLU

THE POWERS NOT DELEGATED TO THE UNITED STATES BY THE CONSTITUTION ARE RESERVED TO THE STATES


75 20 11 33 58 28 11 57 29 24 64 39 49 59 42 71 65 75 20 28 13 61 42 39 18 63 75 11 33 22 28 11 88 64 71 68 39 42 71 44 75 59 28 48 38 39 86 11 77 65 28 11 71 44 33 42 28 39 38 57 11 18 69 44 65 75 27 87 42 28 88 75 20 71 33

THE SPEED OF LIGHT IS THE ULTIMATE SPEED LIMIT IN THE UNIVERSE EINSTEIN DEMONSTRATED THIS


21243 21233 21231 21248 21235 21246 21230 21233 21242 21239 21243 21246 21233 21244


AAXGDAAGGDFAFGGDAADXAFGGFDAXAFFDFXGXGAAGFFFGADGXFAGXGAADXDDDAFFDFDDAAAAADDDXAFDDFFFXDDGAGDADDFADGAGFGDDXAFGXGGGDADDFAAXFFADGFFFFXAXFADDFDXDXDGGAXFFAFGXGDGDGGFFDFAADFGDA

CODED TRANSMISSION INDICATES ENEMY FORCES ASSEMBLING ALONG THE BORDER WITH HEAVY ARTILLERY UNITS


AYYIESAYJRBCZZPYJJPRCGCWWJMKVLNYKNMGBRFFGJKVYNMPFITVGAMAREMZJHXUGTOHMXEIVEVXGHEFITFVUHWQWMIXIKSFBODOMBHCERITBYTRFZXYEQLUJKLBYJLVINKUGMIMUSZONKK

FOURSCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH ON THIS CONTINENT A NEW NATION CONCEIVED IN LIBERTY AND DEDICATED TO THE PROPOSITION THAT ALL MEN ARE CREATED EQUAL


GFSOWDCDJIGQQLTHOVWMFOFHLTDIFJCTLICOAIKEEBWEH+PECIFFLKKTOSIHGOVROUOO

COWARDS DIE MANY TIMES BEFORE THEIR DEATHS THE VALIANT NEVER TASTE DEATH BUT ONCE


TESOOBIEEINDAONIACHEOAALCEEDEGTNIYIEDNYSRSEONEFAFMATTBVOHDLNRENAANDLRDVNHESRS

ON D DAY THE ALLIED FORCES LANDED ON FIVE NORMANDY BEACHES IN THE GREATEST SEABORNE INVASION


09908 09996 09993 09991 09997 09904 09996 09993 09906 09992 09997 09907 09909 09911 09999 09907 09997 09902 09910 09993 09902 09908 09993 09992 09990 09913 09900 09993 09903 09902 09990 09999 09908 09908 09997 09907 09908 09999 09999 09900 09990 09993 09906 09908 09997 09999 09906 09993 09902 09999 09997 09907 09907 09999 09902 09991 09993 09999 09906 09991 09996 09997 09908 09993 09991 09908 09999 09902 09992 09995 09906 09993 09999 09908 09996 09919 09901 09999 09902 09997 09907 09908

THE CIPHER DISK WAS INVENTED BY LEON BATTISTA ALBERTI A RENAISSANCE ARCHITECT AND GREAT HUMANIST


QHCE VBSQ FSBQ OOYW DIQP PVGF ORKP YPSQ FQBO CRVT GCFM MCCE VEKS QPYC FQBP CCBO VJIB QYFP XVYG BYHY POIK RBYS YFWG QOPG KSPK GVEV OVGN VOSQ GVWK BEVO YMFP XVQG SXYP VSPK GVOX CKBE HQAV HYOK OVXQ GEVG

A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN THE ARCHITECTURE SHOULD MAKE MISUSE HARDER


MVZDDMKQARWDMXHDVQLCWZAXPKXZMUYAKDCOHYAQXQFQZXPLYQJORPSLWMTQPWRZIBYQAOJKE

THE BATTLE OF BRITAIN RAGED IN THE SKIES ABOVE ENGLAND FOR FOUR MONTHS IN NINETEEN FORTY


YMJ WFNQBFD FWWNAJX


33 56 63 25 67 56 65 62 34 77 66 47 76 55 56 46 58 43 57 75 66 36 52 25 57 46 38 65 55 87 46 58 53 58 77 64 44 52 57 87 46 58 54 34 45 36 47

ASK NOT WHAT YOUR COUNTRY CAN DO FOR YOU BUT WHAT YOU CAN DO


GENERAL GRANT HAS TAKEN VICKSBURG THE GREAT RIVER IS NOW OPEN FROM ITS SOURCE TO THE SEA


WTJMJWGSYXDEQVOUSWWWEUKFFWVOIOTZBXJUDSBVPBTEZEAAEOHGVOTJKJJCMUPPKJIKWXZXM

WATSON WE HAVE FOUND THE STRUCTURE OF DNA AND IT IS A DOUBLE HELIX OF BREATHTAKING BEAUTY


ANQFHCLAIRXLVGKJGKGVELNPKIVHRWUVRPVVETRUKBRCJLWLMEFHRIYISMIJFSRCISJGIZZVNUPSF


91 88 33 27 34 87 94 49 91 48 21 68 14 3 48 50 88 26 14 96 64 40 27 80 33 40 59 50 32 43 48 88 82 3 64 33 3 1 25 3 2 70 11 63 2 34 23 70 68 60 26 45 96 43 88 76 14 39 62 50 94 26 78 59 60 43 3 48 1 11 45 70 66 81 57 63 72 39 41 1 39 63 17 27 67 33 68 49 35 21 93 63 94 48 3 50 32 43 33 4 14 96 68 66 63 30 23 2 39 63 94 27 67 33 68 11 88 59 46 91 50 68 94 23 1 14 68 26 80 22 92 35 93 63 88 33 3 33 53 60 48 81 52 43 68 17 48 80 33 92 78 49 25 94 25 17 22 63 39 27 49 99 91 48 53 60 93 68 43 48 30 61

THE ARCHITECTURE SHOULD MAKE MISUSE HARDER A TRANSPARENT TOOL SHOULD SHOW ITS REASONING POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF


TRESHDCHPEOOIAERMAADBOCGSDSGENSRAGPAAIPSMIAASTHIMCEVEEHTNSOCTTEGSDUTURFUAIQCTETKOLBCHUUPLBHSETIIRASAABEINHTHSEHETSROESDTUEHPIELPECESLLPEIXTHUPANTLBYPTELEESWINNEENLEISEAEENYYHTIRETEHTFX

THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER THE MESSAGE WAS HIDDEN BUT NOT SECURE GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS


AAAAA ABABA AAAAA ABBAA BAABA BAABB BAAAA ABAAA ABBAA AABBA AAAAB BAAAA ABBAB ABAAB AABAA AABAA ABBAA ABAAA AABBA ABABB AAAAA BABAA ABAAA BAABA AABBB AAABA BAAAA ABAAA AAAAB BAAAB AAAAA ABBAA AAABB BAABA AABBB AABAA AAAAB ABBAB ABABB AAAAB AABAA ABABB AAAAA AAABA AABBB ABAAA ABBAA AABAA

ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE

Bacon's biliteral cipher: each letter encoded as 5-bit A/B string.


NZKUSTWNBQJXFAYYGBANKUFHWWFYWMZPJLCFEAGJNTWOIUJJIICGCBJCGZXDDYMLBKANPUISULUUSAUQA

GENERAL ORDERS NUMBER ONE ALL COMMUNICATIONS SHALL BE ENCRYPTED USING THE APPROVED CIPHER DISK


DMIKSXMHGRCYHKSWVPZETRURXXRCGIKPAIMEKPOEFBQIQRXFPDFLOMFJZPRVDMMUDMSJWKJPVBTFKCHB

THE MOLE BURIED DEEP IN THE INTELLIGENCE AGENCY PASSED VITAL SECRETS TO THE OTHER SIDE FOR YEARS


QWAFVWIQIN


YMWIIBLEPFJZXJOWGLLFYYKPRWEGNBXEJLMXCDLFPCOJZWFFYYGUSJHDPECVROCDWVPJ

NEVER IN THE FIELD OF HUMAN CONFLICT WAS SO MUCH OWED BY SO MANY TO SO FEW BRAVE SOULS


CNORACFVSMFVQVWYSEZYOQK


YGRNKPZFIRRYQQCTPXCYQXEAEEPNQOJDQXGJLPZVZEEZSARMLWFSGDQENUVWUNHDXDPNFBWYVWQ

ARMY OF THE POTOMAC CROSSES THE RAPPAHANNOCK TONIGHT ABSOLUTE SILENCE IS IMPERATIVE NOW


KKYXVXOHHHAWWMYMGHOTYHYHSKKQNSNDNSFNBWWUNZKJSJWYYJXXYHHRBVJHBUQJHZGMOHOGYHHZSQVSRMFSXE

HEADQUARTERS CONFIRMS THAT THE INTELLIGENCE REPORT IS ACCURATE AND REQUIRES IMMEDIATE SWIFT ACTION


QNGHWEAGJBX


IF YOU KNOW BOTH YOURSELF AND YOUR ENEMY YOU NEED NOT FEAR THE RESULT


61 72 72 91 30 58 52 80 89 91 52 65 57 91 47 53 80 89


ZATMMSKQ


ODRNIEHLSXXLIOSDSODXXX


HTDKYLZAOPCIBZPCMETDGMYGCPPOMEECC+ZQFUOXRAFOBHCQNYHWCFPODZZOBIRZGUCRBSHPQAY

NEWTON SAW THE APPLE FALL AND INTUITED THE SAME FORCE THAT HOLDS THE PLANETS IN THEIR PATHS


CNRVUGPPKBODRCFRFHQWPPREKOXMFJLFAHHOJUKXEZQHPIGXMRNZKMURZKUJGVUWONZKUQYVOII

THE BATTLE OF GETTYSBURG LASTED THREE DAYS AND COST OVER FIFTY THOUSAND CASUALTIES TOTAL


⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨w10⟩ ⟨a07⟩ ⟨w20⟩ ⟨a25⟩ ⟨w32⟩ ⟨w04⟩ ⟨w20⟩ ⟨a13⟩ ⟨w08⟩ ⟨a17⟩ ⟨w32⟩ ⟨w22⟩ ⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨w10⟩ ⟨a19⟩ ⟨w20⟩ ⟨a25⟩ ⟨w32⟩ ⟨w14⟩ ⟨w08⟩ ⟨a01⟩ ⟨a01⟩ ⟨w40⟩ ⟨w28⟩ ⟨a07⟩ ⟨a11⟩ ⟨a19⟩ ⟨w20⟩ ⟨w08⟩ ⟨w38⟩ ⟨w08⟩ ⟨a11⟩ ⟨a01⟩ ⟨w20⟩ ⟨w32⟩ ⟨a23⟩ ⟨w28⟩ ⟨w22⟩ ⟨w20⟩ ⟨a17⟩ ⟨w14⟩ ⟨w10⟩ ⟨a19⟩ ⟨a19⟩ ⟨w20⟩ ⟨w14⟩ ⟨a25⟩ ⟨a01⟩ ⟨w40⟩

THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY

Babington nomenclator: symbol tokens ⟨wNN⟩/⟨aNN⟩ used in the 1586 Babington Plot.


ETQUUVJGTWDKEQPPQY


35 47 66 59 35 48 36 55 87 56 37 30 44 47 57 57 48 67 64


D0 Y0 C8 Y0 O1 Q6 O0 P9 O4 T7 S3 M2 C5 S7 N3 P6 O4 P6 I1 D2 U4 K3 M6 A9 C0 K8 L6 C1 A5 N3 P2 A3 M5 A4 B6 A9 P6 I6 B3 P3 B6 B3 O0 B8 O6 T9 B7 K0 C1 G7 G7 C9 I6 B0 M8 A6 M9 U4 T0 R8 C4 C1 I5 C4 A3 K7 O2 Q7 M8 M2 T9 A4 O4 Q8 J9 M5 D2

NAVAL UNITS IN POSITION OFF THE COAST AWAITING SIGNAL TO COMMENCE SHORE BOMBARDMENT AT DAWN


TRESHDCHPEOOIAERYSOLESRNERNFTETSIAREEILSHIMCEVEEHTNSOCTPBEDERPSUROEIHTITETNFMNAXETIIRASAABEINHTOINETSAOMSMTVEEVUSTSOAGIXTHUPANTLBYPTELELUCDTAIFBFOOEDCEDPEBRKCMX

THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS


52 48 28 47 39 65 87 45 56 59 39 39 66 46 54 30 28 35 58 56 67 42 57 29 36 67 73 67 73 40 37 55 50 63 68 45 46 26 29 60 65 70 45 56 35 59 58 84 88 45 36 47 45 67 57 56 64 48 26 59 58 65 76 56 27 67 56 40 76 49 54 39 47 55 37 74 68 52

THE HEAVENS DECLARE THE GLORY OF GOD AND THE FIRMAMENT SHOWETH FORTH HIS HANDIWORK EACH NIGHT


CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS THE ARCHITECTURE SHOULD MAKE MISUSE HARDER ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN


OHJ ZEZQ WXKSCD MFPLPQ UVAA ALA DAUXTXK PEIJNFKA BRUNNOB FOJMSC PHFZZPE VGA SISHNDOA GQ UXBPD ZZMKAZAAM PLCJFA SGE HJTHHHB FRZCTLTCOQ SUMTKR XKP CBVSVZYBTSHP WF GZBJLOPU WJJOGOQ VWV TONNML PUMZBOB GQ WAXPQWFRM AAK NTDMHNJL

THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX ATBASH ENCODES BY REVERSING THE ALPHABET


20 82 68 59 76 69 80 66 50 61 66 36 82 80 82 52 50 65 80 69 52 68 57 69 76 95 50 25 82 29 82 80 82 68 29 11 11 82 52 80 43 65 66 61 50 66 61 82 57 76 11 69 59 20 57 82 66 80 68 29 61 65 69 61 50 66 50 69 29 68 65 65 57 50 82 61 52 69 57 59 77 29 68 80 82 29 52 80 43 65 66 50 69 29 66 89 50 52 82 11 69 29 69 66 52 69 29 76 59 61 82 69 20 76 59 61 52 68 66 50 69 29 89 50 66 36 82 29 52 80 43 65 66 50 69 29

BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION

Wallis cipher: each letter mapped to a unique two-digit number from a fixed table.


EQT RWETF QKMX SZGL


LYTZUJVVFCSQGHVY


FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS


⌐ └ ⌐ ─ K X· ┌· Γ· ─ ¬· ¬ ┌· ┘· ┐ L L ─ Γ· ¬· ┌ ⌐ ⌒ Γ· K r· r ┌· Γ· ¬ X ⌐ ─ Γ K r· L ¬ ┘· ┌ ¬ L ┌ ⌐ r r· Γ· ─ L K r· L └ Γ· ¬ ┌· ⌐ ┌· ⌒· ┐· ┌· L X L ┌· K· L X ┐ ─ ┘· ⌒ └ L Γ ¬· L ⌐· ┘· ┌· K r· L r ┘· ┌ ┌ X· ─ Γ· K ⌒· ¬ L ⌐ X· ⌐· ┘· ┌· K Γ· X K r· L ┌· L r Γ· ┐· ┌· ┘· r ⌐ └ ┘· ⌐· K· Γ· ¬· L ─ L ┌· L ⌐ ─ Γ Γ L r ┌· ⌒· ┐· K X Γ· K X L └ ⌐·

ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF


DYEAZGKUTPLCOOSZKKNYNEHYEEDGWPXHPIBMDTTTMLFYMNDQIGNQYRHQEENJKBCJYUSEPTUJ

ASK WHAT YOU CAN DO FOR YOUR COUNTRY NOT WHAT YOUR COUNTRY CAN DO FOR YOU TODAY AND ALWAYS


HSPYPGPCLYJQZCXZQRZGPCYXPYEMPNZXPDOPDECFNETGPZQESPDPPYODTETDESPCTRSEZQESPAPZAWPEZLWEPCZCEZLMZWTDSTELYOEZTYDETEFEPYPHRZGPCYXPYEWLJTYRTEDQZFYOLETZYZYDFNSACTYNTAWPD

WHENEVER ANY FORM OF GOVERNMENT BECOMES DESTRUCTIVE OF THESE ENDS IT IS THE RIGHT OF THE PEOPLE TO ALTER OR TO ABOLISH IT AND TO INSTITUTE NEW GOVERNMENT LAYING ITS FOUNDATION ON SUCH PRINCIPLES


ZHHCTFAOSAROFSOFSZIXFZHEGTBESIJTXSEITBAIZITAZFTPEIEGTSAAXRKTPIIOTNXZHCFOITPIEOS

ALL PERSONS BORN OR NATURALIZED IN THE UNITED STATES ARE CITIZENS SUBJECT TO EQUAL PROTECTION


XMIIDAZINSROMKPYHOUUIKVGBQJCNFYTHEIIFDAJXUHKNJZIKYTYRORUEHEEPFZWTWUXGKBIE

DO NOT GO GENTLE INTO THAT GOOD NIGHT OLD AGE SHOULD BURN AND RAVE AT CLOSE OF DAY RAGE RAGE


IOUXFSWLEAPBQRRBSNDKKUJNEEWNVWFTTDNYXCAQCWWHARTAPDTNNSMRRZOGSVKVEOIDNOCKTSTRHUAKINAXXIRLQOZINJQXUFCEXCPXMIASHKYODWBIIVQPUTFUOTYIKQPFJHDNLQYALFASXEYHMLOHNNQTWKTZRJNPRFAUCNCBKDRVMAPDDWE

THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER THE BEST LESSONS SHOW WHERE THE METHOD FAILS

Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP.


TQFXKNUAYLEIDMVBYZ


RFBMHXMPCSABMJJLTQ


DEIRVWPMKUIWIFRYJXVXAHHEJ


PROCEEDASPLANNEC


09999 09902 09902 09919 09997 09908 09991 09903 09993 09904 09908 09997 09907


sheol otain okain shal ctaiin qokeedy daral shedy okain lkaiin chor choldaiin chor chedy lkaiin chedy shal qokedy raiin daiin okain daral otaiin rcheol okain shor qokeedy otaiin otain ytaiin ytedy choldaiin otol otedy ykcheol ytedy chor ytaiin ctaiin sheol sharal otol okshy rcheol daral aiiin ypchol

SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN


XPSNS QAHUVZTVVTPU TUSTXHQNV NUNZR IPAXNV HVVNZCETUD HEPUD QYN CPASNA BTQY YNHGR HAQTEENAR LUTQV

CODED TRANSMISSION INDICATES ENEMY FORCES ASSEMBLING ALONG THE BORDER WITH HEAVY ARTILLERY UNITS


MMHZTEOFWQYTVSR


DLBCIQYU QV VOF ZHEPQZREHM WI XPHMQGYF IQF KFKUAWUA LVZFTI

BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF

Gronsfeld: Vigenère variant with a digit-only key (0–9 per position).


EPCRXKALVWHLUKSUUTPEW


18.3.10 7.6.3 1.4.2 15.2.5 3.6.8 17.6.4 19.6.5 1.6.8 18.6.10 8.3.1 14.6.2 3.6.7 1.4.1 15.6.8 16.5.1 16.1.2 1.1.8 1.4.7 17.5.10 17.4.8 9.5.9 5.5.6 16.3.10 13.4.4 18.2.8 7.3.6 4.3.6 12.6.7 2.1.6 10.2.1 2.2.8 17.6.4 20.5.6 13.4.1 4.3.9 20.5.8 7.5.5 10.4.7 17.1.1 11.1.6 17.2.4 7.5.6 14.4.8 20.1.9 6.6.8 8.4.5 6.5.6 17.1.5 11.2.4 19.6.6 7.1.10 16.1.8 16.5.3 20.2.10 8.2.5 15.3.1 15.1.3 8.6.9 19.4.7 12.6.10 17.6.6 6.4.6 19.2.1 18.5.9 2.2.4 11.1.2 17.5.5 10.6.1 2.1.2 8.6.3 15.2.7 1.6.6 4.4.9 19.1.4 6.5.4 5.2.8 2.6.6 8.2.2 6.3.8 17.3.7 12.4.4 11.1.3 14.3.4 14.4.4 6.5.3 3.5.8 20.3.5 16.6.3 16.2.4 12.6.2 17.3.1 18.3.7 17.5.1 20.1.4 13.6.4 2.4.1 18.1.1 20.6.7 10.4.3 19.3.8 3.2.7 13.6.8 2.3.8 12.4.1 5.2.7 7.4.3 5.1.7 15.5.9 15.6.5 3.3.3 20.1.1 18.5.7 14.6.5 3.6.10 6.5.4 8.2.8 6.1.6 14.6.5 18.3.3 13.3.1 1.5.1 19.4.9 1.6.10 10.4.5 20.3.3 12.6.1 11.3.1 15.5.7 9.1.1 17.2.9 18.1.10 1.2.3 19.2.6 11.1.4 1.2.9 20.5.6 7.6.2 7.6.6 2.4.8 8.3.4 11.6.4 8.3.7 15.6.2 11.2.2 3.6.8 19.5.2 9.3.1 16.6.8 20.5.7 1.6.1

AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER TOMORROW

Arnold-André book cipher: coordinates (page.section.word) referencing a shared text.


DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX


TEXEIETOFRSXXHEPRMNCNIMXXX


31 11 23 24 43 44 34 42 24 11 15 43 45 33 35 42 34 21 15 44 11 13 34 33 31 11 32 24 42 11 14 11 51 45 15 31 44 11 23 11 13 24 11 11 44 42 11 43

LA HISTORIA ES UN PROFETA CON LA MIRADA VUELTA HACIA ATRAS


A-KHA   /   CLA-GI-AIH   /   DZEH   /   TSAH   /   DIBEH   /   A-KHA   /   NO-DA-IH   /   GAH   /   MOASI   /   DZEH   /   THAN-ZIE   /   A-KHA   /   A-KHA   /   DIBEH-YAZZIE   /   DIBEH   /   WOL-LA-CHEE   /   DIBEH-YAZZIE   /   DIBEH-YAZZIE   /   A-KHA   /   GLOE-IH   /   TKIN   /   TSAH   /   BE   /   DZEH   /   CLA-GI-AIH   /   DZEH   /   TSAH   /   BE   /   DZEH   /   TSAH   /   THAN-ZIE   /   A-KEH-DI-GLINI   /   DZEH   /   GAH   /   TKIN   /   MA-E   /   TKIN   /   MOASI   /   WOL-LA-CHEE   /   THAN-ZIE

OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY

Navajo Code Talker cipher: Navajo words represent English letters.


AZBSILAJNVNWSORIUMMHXXOGLUBYIIKOKYDKOTFWKCMUQGFJEXCKXPWLQDECKKDDORCMYMNNTDCLNEZVUMLJHYTFRLMZQUMXIIWTIFEQBXBRDURBRGTYOXNQDVYVCZSPWMGAAPWCQVGHYFQNVHKOXYINTAMLFLR

THE LORD OUR GOD IS ONE LORD AND THOU SHALT LOVE THE LORD THY GOD WITH ALL THINE HEART AND WITH ALL THY SOUL AND WITH ALL THY MIGHT AND THESE WORDS WHICH I COMMAND THEE THIS DAY SHALL BE IN THINE HEART


DPZDKSJMRODHUJOFLKIKOCQLBDWYJQPHFEZFEKAZQXLAPOWDDZDFFNWDKTJUCILKCIEFPWOKRUSE

ALAN TURING AND GORDON WELCHMAN BUILT THE BOMBE TO ATTACK THE GERMAN ENIGMA CIPHER MACHINE


TAPQIVTMLPYITQLRIFTHTLTRNBNHQLIGMAPILAPOQIOSAMT

THE COURSE OF TRUE LOVE NEVER DID RUN SMOOTH THROUGH AGES


SAHNENSOGDHVOOFEMLNHBLNERIFATYALISTDTWHAIETWBAULIETOTELUTOST

THIS ABOVE ALL TO THINE OWN SELF BE TRUE AND IT MUST FOLLOW AS NIGHT THE DAY


EPHMYMAAYX+RREO+RSYGCHNRZ+DAEMCBHKOJBINTIBHFGBDFB+CBHKOCJDKDIRPYCBIPGKDWGJDPMWFSVWEFBLEGSVLICYIDDKCOFQHSBFIHCEOIKYPGFHKSECTHALYDJCUS+QUBXDDEEFJKAXUSCDTTIXFLIJFNEDRDSXXGGBIDNDSFN

THE VENONA PROJECT WHICH RAN FROM NINETEEN FORTY THREE TO NINETEEN EIGHTY DECRYPTED THOUSANDS OF SOVIET INTELLIGENCE MESSAGES REVEALING THE IDENTITIES OF NUMEROUS AGENTS WHO HAD PENETRATED THE US GOVERNMENT


OLTO PJDH ZLRM SOOJ IMKT KTVJ FYPW LCCG USXT ROJT PPFJ FELW WQKO TNAB PUFG PJDE GEWX XXYK ORIW CMTA VCJX TPBG WNOI WRBM XHYR OHYM XUDV TABI MZGW UJDM YXIH FNOW WCXR LHBS OTH

THE ARCHITECTURE SHOULD MAKE MISUSE HARDER ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE PERHAPS

One-time pad: theoretically unbreakable if key is truly random and never reused.


GVFUW FOGZE PBMCT MUDBR SIXFB PXICL DMQLG ST

FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS


CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING ATBASH ENCODES BY REVERSING THE ALPHABET

Morse code: dots and dashes; word-separated by / symbol.


TREACHERYINTHECOURT


WBHRXICSSEERAENCOBOLAYTUETILOSSLHNNAECEKISAXEAUSFSSTTANPACYAGHSYSASMERCMDATRRXCTUNQOELNPAEPRAOIIALLELSFHFIAPBSKEUETXRTTOYLSPARRLLIUDWERNLOLAIIPISEMBPOCCNPDCYATNVECURANINEHNMO

FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER


PAIXAOBFPTHUU


MYECNQXMYATKGIXXNACRHBKCFENVQYCFKBAPYOEMLSTYWFSOOQBYBSKFPZLQSJEVDNXLMICXNYUAQOQBINPFDLDBQLNRVQGGWKIXSZWGINNKARRORSNLTJNSTJVDXKKXCFWXGLKOBCRQSTFUNGCOF

WE THE PEOPLE OF THE UNITED STATES IN ORDER TO FORM A MORE PERFECT UNION ESTABLISH JUSTICE INSURE DOMESTIC TRANQUILITY PROVIDE FOR THE COMMON DEFENSE PROMOTE THE GENERAL WELFARE


SFNZM IVZWZYOV LFGKFG HSLFOW HSLD ZOO IVZHLMRMT HGVKH ZGYZHS VMXLWVH YB IVEVIHRMT GSV ZOKSZYVG

HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS ATBASH ENCODES BY REVERSING THE ALPHABET

Atbash maps A↔Z, B↔Y, … and is its own inverse.


PUBL XCIN FRAS TRZC TURE DESE RVES CXRE FUZD ESIG NZAZ X

PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN

Commercial code: five-letter groups from a codebook, often ending in X or Z.


⟨w08⟩ ⟨w22⟩ ⟨w14⟩ ⟨w40⟩ ⟨a25⟩ ⟨w08⟩ ⟨a01⟩ ⟨w20⟩ ⟨w32⟩ ⟨w22⟩ ⟨w08⟩ ⟨a19⟩ ⟨w10⟩ ⟨a17⟩ ⟨w28⟩ ⟨w22⟩ ⟨w20⟩ ⟨a17⟩ ⟨a11⟩ ⟨w40⟩ ⟨w22⟩ ⟨a13⟩ ⟨w08⟩ ⟨a19⟩ ⟨a25⟩ ⟨w08⟩ ⟨a07⟩ ⟨w22⟩ ⟨a25⟩ ⟨w10⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨a19⟩ ⟨w40⟩ ⟨a13⟩ ⟨a25⟩ ⟨w04⟩ ⟨w20⟩ ⟨w22⟩ ⟨w22⟩ ⟨w08⟩ ⟨w26⟩ ⟨w20⟩ ⟨w22⟩

A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES


LLGUIKAGVPCBGJWZVIFOEQTOWFMVOFHLRJFVLMPRY

SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY

Running-key cipher: Vigenère with a very long key (e.g. a book passage).


GUR OVSVQ PVCURE PBZOVARF N CBYLOVHF FDHNER JVGU GENAFCBFVGVBA UHZNA ERNQNOYR BHGCHG FUBHYQ FUBJ NYY ERNFBAVAT FGRCF GUR IVTRARER PVCURE HFRF N ERCRNGVAT XRLJBEQ

THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS THE VIGENERE CIPHER USES A REPEATING KEYWORD

ROT-13 is Caesar with shift 13 — it is its own inverse.


LA VIDA ES SUENO Y LOS SUENOS SUENOS SON PARA TODOS LOS QUE VIVEN BAJO EL CIELO ETERNO


CSIMUYEAZLAYCZSCEMNEAWTHCSIMUYEAZLAYCZSCEICLBROWMPVEYIDBHIABFCQMOFJYXZHDOSSTWPSFGSTYEJWHTGNKCNTHRQBWLJTKMSTYEJKMVILVKOHFFHNMLHBSRUVTKAUZ

WE SHALL FIGHT ON THE BEACHES WE SHALL FIGHT ON THE LANDING GROUNDS WE SHALL FIGHT IN THE FIELDS AND IN THE STREETS WE SHALL FIGHT IN THE HILLS WE SHALL NEVER SURRENDER


KWAEULJXAAFNDKFYOGMVPGLJVFMCOQRWJVNPKWNVENVYJPBKWOPKQBDHKYCKMONRALJWDOAGNBAKYA

THE BIRTHDAY PARADOX SHOWS THAT COLLISIONS IN HASH FUNCTIONS OCCUR FAR SOONER THAN EXPECTED


NCOWQMRAMZAANCWVIJSGMPOGLYIYRDCZRKGGEHXGHXXLYUIIMLBEDJUTCFTKJDDQXPCHFCDGFYAVL

ON D DAY THE ALLIED FORCES LANDED ON FIVE NORMANDY BEACHES IN THE GREATEST SEABORNE INVASION


TRUSTNOONE


ISLIDWNGPAWQZCIBNZEGFXYXZKMNWDIKSATGLICYNSCJY

THE REPORTS OF MY DEATH HAVE BEEN GREATLY EXAGGERATED


WUDUHQB FQJJED BUT JXU JXYHT QHCO YD Q TQHYDW IMUUF QSHEII VHQDSU VEBBEMYDW JXU RHUQAEKJ

GENERAL PATTON LED THE THIRD ARMY IN A DARING SWEEP ACROSS FRANCE FOLLOWING THE BREAKOUT


SFELQLJAHWDWFROZVYVKDKGZKMKELKTXRCPYXRYAWWCZECDLUVQLYJZWOFPLUETVRAMTEJAXDXVZ

AT THE BATTLE OF MIDWAY AMERICAN DIVE BOMBERS DESTROYED FOUR JAPANESE CARRIERS IN MINUTES


LNSMXESMMZ


GUCQILQYHCDDAT


AFXDXGAAADVGXAXGVDXDDVADGVDDFDDFDADAGVDDADDVFXDDVDFGFXFFGXFXGAAAAAAGAAFXDVDDFAGVFAVDADXAAAAFAAGDAGGDAFDGGVDADAAVAFAXAFFDDVAFGDFFDFGVAFAAAXAFDV

WITH MALICE TOWARD NONE WITH CHARITY FOR ALL LET US BIND UP THE NATIONS WOUNDS AND HEAL


998 813 804 822 819 814 813 999 998 818 800 822 999 100 998 800 815 815 811 804 999 998 805 800 811 811 999 102 998 808 813 819 820 808 819 804 803 999 100 998 818 800 812 804 999 998 805 814 817 802 804 999 107 998 807 814 811 803 818 999 100 998 815 811 800 813 804 819 818 999 104 998 819 807 804 808 817 999 998 815 800 819 807 818 999

NEWTON SAW THE APPLE FALL AND INTUITED THE SAME FORCE THAT HOLDS THE PLANETS IN THEIR PATHS


HLRS CQES WLHT HMBT LBMB ONLI CENT URDI YAEE OEIA RASM EYSI TOIA EITB BRLN TTNO WABC XTPE TORN GHIE NPOI UTKI NEEX OHAP NECR TUTW BACT UETD MRXR ECRT CRAW SSOR LSIR EHTA TXIR HOWI YPOA PREP UOIN CHCA XCSE TOPP HPLA DAHB NNIR EHIX AARE SHTS OPTS KASA GGIB INX

HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE CERTAINLY


LYQFAVOMQBPHJFQBRLFELQKFVHAQKBLVHGLAYKFYGOPLGQHXVLPBAHOLJJBKSLPGFQUHOLRGOH

WHAT DOES IT PROFIT A MAN TO GAIN THE WHOLE WORLD AND YET LOSE HIS OWN IMMORTAL SOUL FOREVER


SFENASKQQSTAPSSGHPAPSTWMCHPSFEJQEESMLJEATPSJXTRGHXJEVRMJWRSGEURTVLMGSCTENASMGSDECTENPWNB

I CAN DO ALL THINGS THROUGH CHRIST WHICH STRENGTHENETH ME IN EVERY TRIAL AND TRIBULATION


SITS DUNI GGNS REIV NXEN TSIC RRNS DECE MECS SRTI BGAA IMOO DRXX IEOP PEPP CEEE UTSU RHET CSFL HHSL ELPF XXIE SNEE FAAO PTID OITU UNIA RINR XCSA NCXX ADLO IPED METV YNLY CDDT ETMS TQOP ULET XXIN ORHS URDA ESHE BLAE RETR KIIE EECW TOX

SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION


QNOABURSQPIAPARBEFFXWSISAHCTJSHTNCERBLPRIMRMSGGCJJJBVGVESOOQIANVCAABYPYUKG

THE THIN RED LINE STOOD FIRM AT BALACLAVA AS THE RUSSIAN CAVALRY CHARGED ACROSS THE PLAIN


DALDJAKTAIIKMTLIAS


MVYPRUVDAOLAOVBNOAZAOHAPAOPURAVDHYKFVBZHPAOAOLSVYKAOVBNOAZVMWLHJLHUKUVAVMLCPSAVNPCLFVBHULEWLJALKLUKAOLUZOHSSFLJHSSBWVUTLHUKFLZOHSSNVHUKWYHFBUAVTLHUKPDPSSOLHYRLU

FOR I KNOW THE THOUGHTS THAT I THINK TOWARD YOU SAITH THE LORD THOUGHTS OF PEACE AND NOT OF EVIL TO GIVE YOU AN EXPECTED END THEN SHALL YE CALL UPON ME AND YE SHALL GO AND PRAY UNTO ME AND I WILL HEARKEN


FQPDNKUGONGDVUZLGYPUCSEYQZ


DKZD HGSA JTIS HZQN SCSN HEAX KGSD PUGD ZSKH OZHK EKOK ETAJ EUGS NHYD USDJ GPSK KSNK TDIE FFSN SAKP SKKS NKGS ISKS JKEC SHKO IESH UDKK SNAH ZSFT NSYD VEAX JPDE YHUS SNNS CESL DAIN SUNT IOJE ZEPE KQYD KKSN EANS HSDN JG

ATBASH ENCODES BY REVERSING THE ALPHABET SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH


8.8.9 4.16.8 7.15.1 18.12.2 6.6.1 17.15.4 2.12.3 7.36.7 9.4.6 2.37.4 1.22.8 9.14.10 11.6.7 10.23.2 1.27.6 15.49.9 2.14.14 14.5.14 4.26.2 3.28.14 3.29.3 11.12.9 7.12.3 1.49.1 17.9.14 3.11.9 6.35.10 15.50.13 16.15.7 5.2.1 8.3.11 17.15.13 11.20.11 18.41.5 19.20.7 5.2.13 6.21.15 19.13.15 9.17.3 4.50.3 19.26.12 19.13.7 18.1.13 1.23.8 5.19.8 15.1.9 12.27.15 13.1.7 11.8.2 4.32.2 13.21.2 6.22.9 11.17.8 17.33.6 11.25.6 8.5.5 4.11.7 9.27.12 4.35.9 3.45.6 16.25.6 12.33.6 15.44.8 13.12.6 8.34.10 4.21.13 20.24.1 18.14.2 9.32.1 18.41.15 7.15.15 14.27.1 18.21.5 8.34.12 8.27.12 16.49.11 20.27.10 17.7.9 8.14.13 18.44.3 15.5.14 14.43.9 19.46.3 15.41.10 7.31.8 4.13.1 11.5.14 12.42.1 20.19.10 6.16.12 20.32.4 2.32.9 20.14.12 17.39.7 4.1.14 10.11.7 11.14.4 17.24.13 3.27.12 2.4.14 17.38.4 1.19.6 18.11.1 10.17.12 3.41.7 18.29.15 1.50.7 9.7.7 5.14.14 7.2.3 15.38.8 14.32.7 18.37.14 3.22.12 6.5.8 4.4.4 20.12.4 1.43.2 2.7.7 13.4.7 3.5.9 3.17.11 7.18.14 13.25.9 14.50.4 19.41.12 18.10.8 6.40.7 11.10.12 13.38.13 9.49.10 20.19.14 1.49.6 1.23.15 18.45.15 6.33.4 13.37.15 11.26.2 12.22.8 17.45.14 19.13.6 7.34.11 18.19.15 3.45.5 7.37.5 9.50.8 6.16.3

THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES

Book cipher: coordinates (page.line.word) referencing a shared document.


UKCFWPHPCMUWPSJNZH


GMHSYLJDOANIHWIPPMFRAYNZVBYQ


BHQVPU BN YHGN IPLUS QYN VQALXQLAN PI SUH HUS TQ TV H SPLCEN YNETW PI CANHQYQHJTUD CNHLQR

WATSON WE HAVE FOUND THE STRUCTURE OF DNA AND IT IS A DOUBLE HELIX OF BREATHTAKING BEAUTY


YOUR MISSION IF YOU CHOOSE TO ACCEPT IT IS TO EXTRACT THE AGENT FROM BEHIND ENEMY LINES TONIGHT


THE ARCHITECTURE SHOULD MAKE MISUSE HARDER PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS

Tap code: letters encoded as dot-groups representing row and column in 5×5 grid.


UQPTSKMBTUTBAEBLNZUXI


09908 09996 09993 09990 09999 09908 09908 09900 09993 09903 09994 09995 09993 09908 09908 09913 09907 09990 09919 09906 09995 09900 09999 09907 09908 09993 09992 09908 09996 09906 09993 09993 09992 09999 09913 09907 09999 09902 09992 09991 09903 09907 09908 09903 09910 09993 09906 09994 09997 09994 09908 09913 09908 09996 09903 09919 09907 09999 09902 09992 09991 09999 09907 09919 09999 09900 09908 09997 09993 09907 09908 09903 09908 09999 09900

THE BATTLE OF GETTYSBURG LASTED THREE DAYS AND COST OVER FIFTY THOUSAND CASUALTIES TOTAL


TWOSQ UAREC IPHEX ENCRZ PTSDI GRAPH SWITX TWOPO LYBIZ SALPH ABETX CRYPT OGRAX HYREX ARDSX ATIEN CEANZ CAREX ULTHX NKING ALANT URINZ BROKE ENIGM AWITZ CRIBZ ANDTH EBOMB EMACH INEHU MANRE ADABZ EOUTP UTSHX ULDSX OWALL REASO NINGZ TEPSX

TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS


L ─ K ┌· ┘· ┐· ⌒· ┌ L ⌐ X X· ┌· L X X· ─ r L ┌· K ⌐ Γ· ─ K ⌒· Γ· ─ ⌐ Γ Γ· X K ┌· Γ· ¬ X· K Γ· ┘· ─ ⌐· ┌· Γ· L Γ ┌ ⌐ ─ L X K Γ· ┌ ⌐ K L Γ ┐ L ⌒· └ L ─ ¬· K r· ⌐· ┌· ┘· ┌ X K ⌐ K Γ· X K Γ· r X ┐· ┘· └ ⌒· ¬ Γ· X· X L ─ r ┘· Γ L Γ └ L K K L ┌· X ⌐ X ┐· ⌐ Γ· ┌· X ┘· ⌐· ─ X· ┌ ¬ L ┌· X ⌐· ┌· ┘· ┌ ┘· ─ L K ┘· ⌐· Γ· K· L

ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE

Pigpen cipher: letters encoded as positions in tic-tac-toe and X grids.


⟨w08⟩ ⟨a25⟩ ⟨a19⟩ ⟨w08⟩ ⟨a07⟩ ⟨w22⟩ ⟨a13⟩ ⟨w08⟩ ⟨a19⟩ ⟨w20⟩ ⟨a07⟩ ⟨a25⟩ ⟨a25⟩ ⟨w10⟩ ⟨w10⟩ ⟨a01⟩ ⟨w22⟩ ⟨a29⟩ ⟨w10⟩ ⟨w28⟩ ⟨a01⟩ ⟨a17⟩ ⟨w22⟩ ⟨a29⟩ ⟨w10⟩ ⟨w34⟩ ⟨w32⟩ ⟨a25⟩ ⟨w22⟩ ⟨a19⟩ ⟨w20⟩ ⟨w08⟩ ⟨w22⟩ ⟨w10⟩ ⟨a07⟩ ⟨w32⟩ ⟨a07⟩ ⟨w26⟩ ⟨w08⟩ ⟨w22⟩ ⟨a25⟩ ⟨a19⟩ ⟨w10⟩ ⟨a07⟩ ⟨w26⟩ ⟨w14⟩ ⟨a01⟩ ⟨w08⟩ ⟨w32⟩ ⟨w04⟩ ⟨a07⟩ ⟨w20⟩ ⟨w20⟩ ⟨a17⟩ ⟨w22⟩ ⟨w22⟩ ⟨a25⟩ ⟨a19⟩ ⟨w10⟩ ⟨a07⟩ ⟨w26⟩ ⟨w20⟩ ⟨a31⟩ ⟨w32⟩ ⟨a17⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨w20⟩ ⟨a13⟩ ⟨w10⟩ ⟨a01⟩ ⟨w40⟩ ⟨a11⟩ ⟨w32⟩ ⟨w28⟩ ⟨w22⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨w10⟩ ⟨a17⟩ ⟨w20⟩ ⟨a17⟩ ⟨a01⟩ ⟨w20⟩ ⟨a25⟩ ⟨a25⟩ ⟨w20⟩ ⟨a19⟩ ⟨w22⟩ ⟨w08⟩ ⟨w22⟩ ⟨a13⟩ ⟨w08⟩ ⟨w32⟩ ⟨a19⟩ ⟨w22⟩ ⟨w10⟩ ⟨a23⟩ ⟨a07⟩ ⟨w28⟩ ⟨w04⟩ ⟨a11⟩ ⟨w20⟩ ⟨a19⟩ ⟨w22⟩ ⟨a23⟩ ⟨a19⟩ ⟨w10⟩ ⟨w04⟩ ⟨w10⟩ ⟨a07⟩ ⟨w20⟩ ⟨a25⟩ ⟨w10⟩ ⟨a23⟩ ⟨w32⟩ ⟨a31⟩ ⟨w20⟩ ⟨w14⟩ ⟨w10⟩ ⟨a01⟩ ⟨w28⟩ ⟨w04⟩ ⟨a07⟩ ⟨w08⟩ ⟨a19⟩ ⟨a25⟩ ⟨a19⟩ ⟨w08⟩ ⟨a07⟩ ⟨w22⟩ ⟨a13⟩ ⟨w10⟩ ⟨w22⟩ ⟨w32⟩ ⟨a25⟩ ⟨w32⟩ ⟨w10⟩ ⟨a07⟩ ⟨a19⟩ ⟨w20⟩ ⟨w08⟩ ⟨a17⟩ ⟨w22⟩ ⟨w14⟩ ⟨w10⟩ ⟨a01⟩ ⟨w28⟩ ⟨w04⟩ ⟨a07⟩ ⟨w22⟩ ⟨w32⟩ ⟨a07⟩ ⟨w38⟩ ⟨w20⟩ ⟨w40⟩ ⟨w10⟩ ⟨a19⟩ ⟨a17⟩ ⟨w20⟩ ⟨a19⟩

A TRANSPARENT TOOL SHOULD SHOW ITS REASONING A STRONG CLAIM NEEDS STRONG EVIDENCE POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER


DPXSGZCDXAQDXCZTSXHZRTTRAHYTQCOGVWLV

THE ONLY THING WE HAVE TO FEAR IS FEAR ITSELF


IN THE BEGINNING WAS THE WORD AND THE WORD WAS WITH GOD AND FULL OF GRACE


ESEQBSPUSDUKEVAPQBHHYBIGKLWHATCATSDBSBQEKCHAJBKEKMLQQAQQELKLNBNLPSUKAJUQSRAEKWBKSLNBWENA

IT IS A TRUTH UNIVERSALLY ACKNOWLEDGED THAT A SINGLE MAN IN POSSESSION OF A FORTUNE MUST BE IN WANT OF A WIFE


OROE VDHK URAK YVLK ARQO JGPC JQGE ZOGJ UWPY HNZD E

PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN


1.4.8 7.6.6 11.3.5 14.4.8 16.6.3 11.5.2 18.3.7 3.1.10 15.5.8 5.3.7 2.3.4 6.1.7 9.4.6 13.1.2 5.6.5 10.4.2 19.1.3 5.1.7 15.3.2 10.1.1 20.3.2 14.2.9 7.2.7 14.6.7 11.1.4 15.4.4 10.6.8 17.6.6 20.4.6 15.1.6 12.4.1 3.1.4 11.5.1 1.5.7 7.2.10 6.4.5 19.2.7 5.1.10 19.3.10 12.2.10 6.3.7 5.1.4 14.4.2 10.6.2 3.6.10 7.5.10 8.5.10 17.5.3 11.2.6 14.3.1 2.2.9 13.1.4 13.4.1 8.1.9 13.3.7 11.6.5 10.4.3 2.3.3 4.2.4 2.5.9 18.6.6 15.5.10 6.4.7 15.5.8 7.5.1 14.5.4 4.5.5 6.6.5 3.6.4 6.3.6 20.4.6 1.1.4 14.2.8 7.2.3 12.5.8 5.3.4 2.1.1 2.4.8 10.2.5 5.5.6 3.4.5 10.3.4 13.3.2 10.4.6 6.6.8 2.2.7 19.4.10 18.1.2 16.5.6 15.2.4 13.2.4 1.3.1 8.4.7 8.2.10 9.3.3 17.4.8 2.5.5 17.3.1 18.1.10 19.5.5 16.2.10

INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES


WRTIZKS ZMW GIRTIZKS UIVJFVMXRVH VCKLHV HRNKOV XRKSVIH GDL HJFZIV XRKSVI VMXIBKGH WRTIZKSH DRGS GDL KLOBYRFH ZOKSZYVGH GSV ERTVMVIV XRKSVI FHVH Z IVKVZGRMT PVBDLIW GSV GIRGSVNRFH XRKSVI ZWEZMXVH GSV ZOKSZYVG YB LMV KLHRGRLM VZXS OVGGVI

DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS THE VIGENERE CIPHER USES A REPEATING KEYWORD THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER


5814 4427 4154 5397 4427 5488 5645 4298 4614 5488 5563 5645 4489 4489 4154 5488 4361 5397 4427 4154 4934 5488 4154 5397 4427 4934 4154 4361 4427 5060 4998 4154 4998 4361 5060 5645 5397 4871 4680 5563 5563 4871 4427 4871 4680 4489 4427 4680 5488 5397 5060 5645 4998 4361 4427 4361 5814 4680 5563 4614 4154 5488 4871 4427 4427 5166

WE ARE SUCH STUFF AS DREAMS ARE MADE ON AND OUR LITTLE LIFE IS ROUNDED WITH A SLEEP


06300 02590 01652 0336 06685 6293 4796 03472 01623 07862 1041 02884 5070 02520 1635 05697 1665 7555 06305 01571 4439 01296 05973 6370 2580 1668 3512 1629 07944 7237 02842 06359 02527 06371 02513 1574 5033 03860 00399 02893 04444 6339 01614 7582 06376 2841 6349 5980 01591 03793 1955 1905 00379 2889 3821 00992 03820 4808 5981 1621 1264 02916 5995 00347 5027 4725 05971 6291 06638 05727 01633 04468 04802 6280 00365 5983 03803 4738 02209 00382 4479

THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF FAIL CLOSED IS A POSTURE NOT A SLOGAN

Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher.


YMWVPUPLLGPWKBXZWMFVXZWETFZAHPSXOPDXNEETEGACPOVRAKIFVUUTP

WE HOLD THESE TRUTHS TO BE SELF EVIDENT THAT ALL MEN ARE CREATED EQUAL


NUTSHWEIIHDSIWT


JWZLKWRMVRYOMZNNCWFPYXJESR


YZZDLFWVKHINVZRWAVI


BBICRTHOHJRSFDPQDZAHMGVIVRVUVKTPKHWLJEFDGYSVFX

I HAVE NOT YET BEGUN TO FIGHT SAID THE CAPTAIN TO THE CREW


OASOTHIRHORSSLMERRFUNTDC


THMIDQZKGOPHPGRFGGZZIKMCJPNNAGVAOAWVXDOMWPGGZZIKGGWVGYHWGYFIAGMCTRZACYNGLMYKKZGRUUHV

KNOWLEDGE WITHOUT WISDOM IS A DANGEROUS THING AND WISDOM WITHOUT COURAGE IS ULTIMATELY WORTHLESS


EMJEAJJTVRGQABGFAUAWH


COOCFUBYYDDSETOPZVLDGJSUOBVAPEWVNCRCIBCKPEQXSCPAKICZJSHYNKTZLJAL

WHAT IS IN A NAME THAT WHICH WE CALL A ROSE BY ANY OTHER NAME WOULD SMELL AS SWEET


TOAE USNE OLPP EPHN TIRN RRBU CAAE HHSL ESHL ACRS SBIC DTAF EEBS ESNI AWTS PHIT NRXC EHMX SPNI ITHL FEDE PISO EXPH GTTI EEFR TQOP TWTX OEEH UTRT EDRU SHLW HXSR LOTU STRI IEEE EHOX ISEU ITME EGGN SRSE DXTR TTOI ARNR RCIS SRFX IETS NOPT TAAI MTOE AX

TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS THE BEST LESSONS SHOW WHERE THE METHOD FAILS


KEVTBCHSEYSLLSKUAEQSBACNEBSRCTCTSMTIEBSLSKWEPI


UVWYPZVULYZAHRLU


NMZMWCTBSOAUGESRFFVYIBBLRBCNBBUOULEYJWLPVZBDGGEKMBHZMELWDNZTQWQGOKYEKKRBEBEYLCQBLCVLYQZZQKLSMXPUPLVPKGAKXQNOXULUNQSCEURQGRLVZKUBLPVCLBGFBMOKWRA

WITH MALICE TOWARD NONE WITH CHARITY FOR ALL WITH FIRMNESS IN THE RIGHT AS GOD GIVES US TO SEE THE RIGHT LET US STRIVE ON TO FINISH THE WORK WE ARE IN TO BIND UP THE NATIONS WOUNDS


GEEAKIRMIHVTEDEEYDPNMOEARERATYLGTRXIIHIXBVSCX

GIVE ME LIBERTY OR GIVE ME DEATH SAID PATRICK HENRY


PYPCQLXMDCXCABDQIGHCMHXWGALEBOOVWFWCHTDEGPXZPITLCPBLNJCEFZYMFPNONTJBHQHUXS

CHARGE OF THE LIGHT BRIGADE INTO THE VALLEY OF DEATH RODE THE SIX HUNDRED BRAVE CAVALIERS


AADXDADXGAAGGXDDXDDAFXAFFXGDFXGDGAAGDGFFGFFAAXDADADDDXXAFXXGGFXDDDXFDFXDAAXDAXAXXGDDDGAAGF

NEVER INTERRUPT YOUR ENEMY WHEN HE IS MAKING A MISTAKE


GPURUJJAPRGOAJHMTXYU


TMYKJHGJAQPGANY


69 20 61 82 80 95 68 20 57 82 82 95 50 11 82 29 52 82 52 69 77 82 61 20 82 76 69 80 82 52 69 29 76 50 11 82 29 52 82 68 66 80 68 29 61 65 68 80 82 29 66 66 69 69 57 61 36 69 59 57 11 61 36 69 89 50 66 61 80 82 68 61 69 29 50 29 25 20 82 68 59 76 69 80 66 50 61 66 36 82 80 82 52 50 65 80 69 52 68 57 69 76 95 50 25 82 29 82 80 82 68 29 11 11 82 52 80 43 65 66 61 50 66 61 82 57 76 66 36 82 76 69 59 80 61 72 59 68 80 82 52 50 65 36 82 80 59 61 82 61 66 89 69 55 82 43 89 69 80 11 65 69 57 43 20 50 59 61 61 72 59 68 80 82 61

OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE A TRANSPARENT TOOL SHOULD SHOW ITS REASONING BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES


GURX NFVF XVRK NZVA NGVB ASVA QFER CRNG RQGE VTEN ZFVA PVCU REGR KGPE LCGB TENC ULER JNEQ FCNG VRAP RNAQ PNER SHYG UVAX VATG UREN VYSR APRP VCUR EJEV GRFG RKGV ANMV TMNT CNGG REAO EHGR SBEP RJBE XFBA YLJU RAGU RXRL FCNP RVFF ZNYY

THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL


GSNCXSSEEXOLOLXLANSTOAATXFUOIXDRIPA

Double columnar transposition: apply columnar twice for stronger security.


NOFQKBGFABMWUR


B UTDSTQCUJOU VRTM TJRZME UKTX JVV WFBURSJOI SFUUGUS XPTGX IFNS GSFCN RPOQDQQICEJUJE VZCTVLYVUKRS

A TRANSPARENT TOOL SHOULD SHOW ITS REASONING PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION


TCO DIACOJEST SUAAOOGS


11 44 12 11 43 23 15 33 13 34 14 15 43 12 54 42 15 51 15 42 43 24 33 22 44 23 15 11 31 35 23 11 12 15 44 44 23 15 35 31 11 54 21 11 24 42 13 24 35 23 15 42 15 33 13 42 54 35 44 43 35 11 24 42 43 34 21 31 15 44 44 15 42 43 43 24 32 45 31 44 11 33 15 34 45 43 31 54

ATBASH ENCODES BY REVERSING THE ALPHABET THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY

Polybius square: 5×5 grid maps letters to two-digit row-column pairs.


FAGMPAUKKXOD


GUDCJPJOFDDEMRPBPMAHRTDPOXMYWIEPARLSEGHQZQPULDRHBGWFSGERZPTWYKXLBWHMSNQTTAFY

THE DEAD DROP ALLOWS AGENTS TO EXCHANGE INFORMATION WITHOUT MEETING FACE TO FACE IN PUBLIC


WAAWFJEZGVXL


ABBGSTJAYKTHD


5.4.7 5.3.9 19.4.1 17.4.10 19.2.8 8.4.2 11.1.2 3.3.10 19.3.10 1.6.9 17.4.10 9.2.7 8.3.5 9.1.7 15.6.2 15.2.10 4.2.3 11.4.5 13.6.7 11.1.1 1.6.4 9.3.2 20.5.9 6.2.2 11.4.1 2.3.2 12.1.7 19.4.4 6.3.10 19.1.6 7.3.2 14.5.5 18.2.7 2.1.4 16.1.5 11.5.8 1.3.3 1.2.6 8.4.9 20.3.7 1.1.6 7.1.3 13.4.4 16.2.7 2.6.10 18.1.6 19.3.2 12.4.5 20.5.3 6.6.5 14.2.7 20.5.5 5.2.1 13.3.9 7.4.8 4.1.1 12.1.9 14.6.1 1.3.7 12.2.5 9.5.6 20.5.9 20.6.4 19.3.1 20.5.8 10.4.5 15.1.7 20.6.7 7.3.4 2.1.1 10.1.4 3.6.9 4.5.6 5.5.3 5.1.9 19.4.7 12.3.4 16.1.6 5.2.8 14.6.2 18.2.3 7.6.9 8.3.5 19.6.3 9.1.3 13.2.3 11.2.1 2.3.4 16.3.3 15.5.1 11.6.2 1.6.5 16.5.9 4.5.10 6.1.7 20.3.5 7.6.4 11.2.9 3.2.10 11.3.5 4.6.7 1.1.3 14.6.8 19.2.9 4.6.4 16.4.2 12.4.5 2.3.7 8.2.4 11.3.3 8.3.10 3.3.5 18.1.4 19.2.6 18.2.3 7.2.1 5.4.3 7.4.1 12.1.5 6.4.1 6.4.10 11.2.6 16.4.6 8.3.8 10.6.3 13.5.6 8.1.6

THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS


OZBR RYQO APYN FEWS LCNG FSEA FOHF WGPO AOZG BOSJ EABT SEVS RAOA SFGW AOGS QXSM YRAT GVNE BZFG OHVF GVQE HENA FCAG VGWB AQWC USEF DSOE ENAU SYRG GSDG JVGU BGHF HPFG WHHG WBA

A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION


UXYG DRICOVP


ADSHT DNKIS IEAIE TBSNB CEBNG ESTEG BASYT TIPFC LOAVT HRHEE EHETR AIETS EAVNC ELDTE MMSAR UEPRO

ATBASH ENCODES BY REVERSING THE ALPHABET THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS

Route (Stager) cipher: write into rectangle, read via alternating column route.


TDLDUPDGOKXQ+VQNTEG+XTDFPJWGXOBADURBKCNMUFTAMBAHATFSUNA+EFGXABSXEPIKONASQBFULU

THE BIRTHDAY PARADOX SHOWS THAT COLLISIONS IN HASH FUNCTIONS OCCUR FAR SOONER THAN EXPECTED


L5 O1 G3 O7 Y6 G7 K2 S0 C6 E6 N9


WCLU FXYS IFWJ WFVB VKWY BYTV SWFJ XWYR FBKF CZFU WYXS VUUF WTXV WFNL DDQ

ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN CAREFULLY

Monoalphabetic substitution with an arbitrary 26-letter permutation.


ICYLUUFKLUJPMJSUPEKOMMEJTBGNL+EZN+TTENHEDJKGL+GOU

ALL THAT GLITTERS IS NOT GOLD OFTEN HAVE YOU HEARD THAT TOLD


KZGG VIMD LIWH SVOK YIVZ PNLM LZOK SZYV GRXH FYHG RGFG RLMK VVII VERV DZMW IVKI LWFX RYRO RGBN ZGGV IRMI VHVZ IXSK LOBY RFHV MXLW VWOV GGVI HZHK ZRIH LUMF NYVI HUIL NLMV GLUR EV

PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE


KNOWLEDGE IS POWER AND INFORMATION IS THE KEY TO VICTORY IN ANY CONFLICT


8528 8603 7467 7194 7974 8206 8100 8854 7467 8437 8603 8437 7194 8038 8528 7529 8100 8437 7974 8528


CSAWMPRVJZJW


RJEKQTTKPJCQMYZTDFMKZJNZCRHBXHISZLZNNETRQXJPJXMDOQYMCFKVISJLLRXQAEAIXVHKYNEACMT

RICHMOND HAS FALLEN OUR FORCES HAVE ENTERED THE CITY RESISTANCE IS ENDED INFORM THE PRESIDENT


MMXUOFOUTUXRTHJYPRIM


XESMWZITSHUDGSKIAGFYITGKSMPRSAGLSTORRQTPDQMYDMCNEUTUSMSSCSBSQDITADCQFDQDOMDMFMDTFRKNITGSRLICFLBSCBNRKURLBLRQCSRTSMIZCIZCQILOKQFCYDGBCSNBLSKUDNCLKKHQQAEKREHUELLCQX

WHENEVER ANY FORM OF GOVERNMENT BECOMES DESTRUCTIVE OF THESE ENDS IT IS THE RIGHT OF THE PEOPLE TO ALTER OR TO ABOLISH IT AND TO INSTITUTE NEW GOVERNMENT LAYING ITS FOUNDATION ON SUCH PRINCIPLES


CTUNMCSTEAWEEECUIOR


PPXRUNRLGQTBZSWHNZGC


OMKQIXGCBQBSBBVERRDFNQGUFHCLQUKWGIJPIXBHCNAMPGGR

WE SHALL FIGHT ON THE BEACHES AND WE SHALL NEVER SURRENDER


JYPUFEXWFOOOOGEFTHHFQVNGZCWEPZKTWFROWJYNGBHGXSGSQRKWRXFWRYSIEMAAIVRFIAUKVMR

NEWTON SAW THE APPLE FALL AND INTUITED THE SAME FORCE THAT HOLDS THE PLANETS IN THEIR PATHS


IWOLIOFQFBDBUZGLEWPLPOL


UMCXXCDUIKBDJQDTNQLBDHNZFKDMTJRZOFJOAGZXMFDGEQKCZTNCKKCNUHFXBBDCALKOHOYGAD

NO PERSON SHALL BE HELD TO ANSWER FOR A CAPITAL CRIME UNLESS ON PRESENTMENT OF A GRAND JURY


RKDCSLVCXXREIINRGEXRSNYFOEXLNBHRYBRFEZUOUFUABNDZRHUMUPAX

IF YOU KNOW BOTH YOURSELF AND YOUR ENEMY YOU NEED NOT FEAR THE RESULT


MHCIGNTRYSDGOAKVVVDHMATUGNNNIQVCMHOKDMXYVVQSNUDWBBPSRFIF

THE ART OF WAR IS OF VITAL IMPORTANCE TO THE STATE IT IS LIFE OR DEATH


JTDRUIWEVPNQTBHOGWMTIHWFSDPJSICXNALUDQKXRQRLDGOQGTSPKSPUOBWGZDKLFCRQIDSDFKZLKUFFGSNJLQBDFHAXIDLBOQBWCQKNJLIRZRZAEHXSTXSIXSBZENLSSZMBWJCVXYTHNFK

FOURSCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH ON THIS CONTINENT A NEW NATION CONCEIVED IN LIBERTY AND DEDICATED TO THE PROPOSITION THAT ALL MEN ARE CREATED EQUAL


DABKFRLYNCKLTY


MKQNLVREEJGD


HFYHG RGFGR LMXRK SVIHN ZKVZX SOVGG VIGLZ WRUUV IVMGO VGGVI

SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER


QXUM CQN URWN


7194 8038 8038 8685 7720 8603 7338 8100 7467 8206 8603 7720 8528


JWJPQIZHPSRCHIRCDYZYSCTLDUTLHGRCZMFITZXJBXZMJJYHLOZUPSPDAELHPSPDYHIATLDUWYGVFRDYSGFRFQFINUJJWYYHHDZSRGLJDFLMZMVAECYHSIIXIABMDAGSYHBXNVCSFFBXPKYCRTVPJWZHGQANRPTLECUJ

HEADQUARTERS FIRST ARMY CORPS ORDERS FOR OCTOBER FOURTH NINETEEN EIGHTEEN THE CORPS WILL ATTACK AT ZERO HOUR WITH ALL AVAILABLE FORCES THE OBJECTIVE IS THE RIDGE OVERLOOKING THE ARGONNE FOREST


CBYL PWHF SANB QNRY RGGN EFOF CONE FBSA HZPS EFTE BZBA SGBT VISO FQLG OYRW FOEB QHFN RPLF COEG OAFG BRAQ ELCG ZSFF OTRF EBHG RQVC VREF ENON OUEV RVAO CESF NEVP SNTS BZSG EWPC OGGS EA

POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN

Porta: 13-row table polyalphabetic cipher; reciprocal (encrypt = decrypt).


IHYEZKTSK AO PYEKX UHT AHBYXQUFAYH AO FJK IKM FY NACFYXM AH UHM CYHBZACF


GOWNTIFECXYQVDNLGMLD


CQN OJLCXAH AXJAB


GNMHMYVLJMPGMRIPAMUWSNGTCUTYBXTNMUWTNMVULNGQNMFWUSKNWGWKFUEWMEPNINYYFSGQWVMWYYF

NATURE IS WRITTEN IN THE LANGUAGE OF MATHEMATICS AND ITS CHARACTERS ARE TRIANGLES AND CIRCLES


I3 M4 D5 B6 C7 V8 L1 P0 R0 H1 F6 E1 M9 H5 V8 E0 D5 J0 N3 M9


UGLHTODAOTMLALLPIELEMOFCOMORNICAQNONNPUGATMHUALPKHQHINDLUNOLEIINULMBHEUAWTCTCXMUPQLPMZIMATELWLOTSSCDCUELPHULDARLNOUGLUEIINSGUAQUCOTLXLHEOTSSCDCUDEZBOTCKINDLKGUAHTSAIUGZQMCAPFONCEPTSX

THE FUNDAMENTAL PROBLEM OF COMMUNICATION IS THAT OF REPRODUCING AT ONE POINT EITHER EXACTLY OR APPROXIMATELY A MESSAGE SELECTED AT ANOTHER POINT FREQUENTLY THE MESSAGES HAVE MEANING AND REFER TO PHYSICAL CONCEPTS


HATLNTTONTIALNPEIESERUEMEMMWACNPFNPISDRIICOSROEEDYETRTEGAUTHOGCEVDSOTKNBIRWDASLOAH

THE PACKAGE CONTAINS BLUEPRINTS FOR THE NEW TORPEDO GUIDANCE SYSTEM DELIVER TO ADMIRAL SMITH NOW


WF UKEQR MQPRE AA HWU SWTWCAP YMD XG VLFRS NRQSF BB IXV DTHYEKE FRPWQHX GUL RX ETR TXUCVL

WE SHALL FIGHT ON THE BEACHES AND WE SHALL FIGHT ON THE LANDING GROUNDS AND IN THE FIELDS


TNSHEXXSIXXEGXXEBXXEGXXI


M7 S5 N2 D5 W4 D8 V3 Q2 S9 Z3 I8 N5 K7 V9 O0 H5 S5 F9 C5 W4 I5 E9 Z7 H1 V5 D0 C6 T3 G9 H1 E9 U5 K1 D8 D0 S1 B6 P3 O2 K8 O1 H4 W7 B2 D0 C6 N8 W7


21244 21232 21239 21235 21240 21240 21246 21239 21230 21235 21246 21246 21243


AWDVKQQABUTRASADGLXORDWIESRLYMJHFTNQQWAKIZDRJMFQBUPGI+BZUXEH

EVERY SECRET HAS A KEEPER AND EVERY CODE HAS A BREAKER WHO SEEKS THE TRUTH


OKEZABLBYOCSBWRL


YZIQOLWFPEOAQAYPW


IF ICROQTO AUCDFKT IO NOUNIO VOQS UK FVOKCQ JOCIIOUQ OT NIUS GUSTO NLUQ TLUS IOS BLJJOS ICRQOS

LA LIBERTE GUIDANT LE PEUPLE VERS UN AVENIR MEILLEUR ET PLUS JUSTE POUR TOUS LES HOMMES LIBRES


15.3.8 8.1.9 14.6.10 9.6.5 20.4.6 8.6.9 9.3.3 2.2.10 8.2.9 14.6.10 9.6.7 19.2.5 6.3.10 15.6.7 1.4.1 3.6.3 6.6.1 2.3.7 14.4.4 20.1.10 12.1.6 8.5.1 10.2.4 14.4.9 5.6.1 17.2.1 12.3.3 12.1.6 15.1.9 17.2.9 4.2.6 2.3.5 3.6.10 8.2.5 15.5.7 5.2.9 9.1.6 5.6.4 20.1.6 20.5.4

FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS

Arnold-André book cipher: coordinates (page.section.word) referencing a shared text.


SBXNNNQZEOLVLNABNTOLFTTNMJAQXVHRYLNUETRMFHJEPAEAGLRKWWPTUUPLKPULQIAAGWXWPEEQJXQIXNCU

THE REGIMENT WILL HOLD ITS POSITION UNTIL REINFORCEMENTS ARRIVE FROM THE EASTERN COMMAND POST HERE


ULSEBDHOULCBECWHMEGBJWUFZBVMKEGLOEECOVKLLFWUFZB

ASK NOT WHAT YOUR COUNTRY CAN DO FOR YOU BUT WHAT YOU CAN DO


25 88 48 40 23 43 11 82 24 33 78 82 50 17 93 52 62 22 70 67 32 60 81 45 91 11 23 87 14 58 48

Homophonic substitution: each letter maps to multiple possible numbers.


JWZOHVBSCLQFRWOEUJSPLPKXNMTBRCDGYNUQZDMNUALVKAN

THE QUICK BROWN FOX JUMPS OVER THE LAZY DOG NEAR THE RIVER


⌐ ┌ ┘· Γ L └ r ⌐ ─ r └ ⌐ X X Γ· ⌐· ⌒· ┐· ⌐ K K L ┌· ─ X ¬ X· K Γ· K r ⌐ ─ ⌐ └ X ┘· ¬ L ⌒ ┌· ┘· ─ ¬· ⌐ └ ⌐ ─ K X· ┌· Γ· ─ ¬· ¬ ┌· ┘· ┐ L L ─ Γ· ¬· ┌ ⌐ ⌒ Γ· K r· r ┌· Γ· ¬ X ⌐ ─ Γ K r· L ¬ ┘· ┌ ¬ L ┌ ⌐ r r· Γ· ─ L

A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE


65 37 59 86 25 46 34 64 56 98 25 57 63 43 95 59 56


EHIWYDEPIUCWYLEGRUGIDXCCUYWPQYRIGCEIWJOJLUTSYQ

I HAVE NOT YET BEGUN TO FIGHT SAID THE CAPTAIN TO THE CREW


GHFTGAOZRSZD


SICUTPATAGCHSSHHDEUSBMCGSX


78 19 76 70 11 54 10 28 89 42 45 31 69 46 24 70 30 77 19 27 47 45 30 58 11 66 88 17 19 76 70 27 54 10 46 30 29 19 87 58 72 53 87 30 66 62 19 53

WE SHALL FIGHT ON THE BEACHES AND WE SHALL NEVER SURRENDER


GXFRKVKIROAUCEPKTBOCWGAONQKFQNYDBKSLGXJTMWOLKPWHTBABVRVVMZMFTXXIAPNHLNZBPLHURNZDCT

THE CIPHER DISK WAS INVENTED BY LEON BATTISTA ALBERTI A RENAISSANCE ARCHITECT AND GREAT HUMANIST


MTSOOGKBJYNEVWQCSWMHZRHVTBXBFLWTTXJWWEPNNRBZIIFMYXAMWJKIJICXZUDETIXUESYGIJRXNRYFSKBKRTMWCJSEWUJFICWJDJFNTGISOKZKVLEBBTUAYHWWRPVXJXKDJLQSLAITACDISYDOGUVPFZCSKNDUMMBOVWIKWX

SOCRATES BELIEVED THAT THE UNEXAMINED LIFE IS NOT WORTH LIVING AND THAT WISDOM BEGINS WITH THE ADMISSION OF ONES OWN IGNORANCE THIS APPROACH TO KNOWLEDGE HAS GUIDED WESTERN PHILOSOPHY FOR TWO MILLENNIA


CHEOL YTEDY OKALC HEOLY TAIIN CHEDY CHORY TEDYS HEDYL KAIIN SHORO KEEDY RCHEO LYTED YYTED YOTED YSHAI INOTA IINQO KEDYY KCHEO LCHEO LQOKE EDYQO KEEDY CHORQ OKEED YSHOR CHOLS HARAL CHORK AIIIN AIIIN OTEDY OTOLC HEDAL SHORS HEDYS HEOLC HOLDA IINSH ORDAR ALSHA LYPCH OLOTA INCHO LDAII NOKAL OTAII NYTED YYKCH EOLRA IINOT AINSH ALYTA IINCT AIINS HAIIN SHEOL YPCHO L

ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG

Voynich manuscript: undeciphered 15th-century script; pseudo-syllabic output.


UHCTPOVAOHIGARIOLDGATCOCICCOANEFOEEOETCUUBAQSAGDGAGTWPEDNFDULUBHEVKEABSCZY

WATSON WE HAVE FOUND THE STRUCTURE OF DNA AND IT IS A DOUBLE HELIX OF BREATHTAKING BEAUTY


WEDSHKQR IYOEZIZ DIUUILR PR WPKLR EN YQCHILR NLEC EYI UE NKXI UJI GPRKRGK IMPCKYPUKEY NKYZR LIWIPUIZ ULKFLPCR KY OKWJILUIMU P ROSUPDI KR P LEZ QRIZ HS RWPLUPYR UE IYOLSWU CIRRPFIR CEZILY IYOLSWUKEY KR YEU HLEGIY HS DIUUIL NLIVQIYOS OILUPKYDS

POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY CERTAINLY


09997 09902 09908 09996 09993 09990 09993 09995 09997 09902 09902 09997 09902 09995 09995 09903 09992 09991 09906 09993 09999 09908 09993 09992 09908 09996 09993 09996 09993 09999 09910 09993 09902 09999 09902 09992 09908 09996 09993 09993 09999 09906 09908 09996 09999 09902 09992 09992 09999 09906 09909 09902 09993 09907 09907 09911 09999 09907 09919 09904 09903 09902 09908 09996 09993 09994 09999 09991 09993 09903 09994 09992 09993 09993 09904

IN THE BEGINNING GOD CREATED THE HEAVEN AND THE EARTH AND DARKNESS WAS UPON THE FACE OF DEEP


22349 22358 22349 22357 22369 22340 22359 22352 22347 22349 22353 22358 22349 22345 22352


XHWNNMVETYISPKZCWCCHOXFIZITUSYDEFCQFRSAPGYBIYZOFCQIDPLFLZYCXNXROAVQQDZGEINXVGF

BLESSED ARE THE MEEK FOR THEY SHALL INHERIT THE EARTH AND THE PEACEMAKERS SHALL BE CALLED SONS


FDUALELHSAALI


OGSYAJKPSEHFHMBFSAYIRSSZFHCUDUGIZXCASGTFOTIO+SPU


HJDTUIPYRCDHCBDKEJMLZCZDVLZDGENDWNLLFGJJJREZTHABNNOAJKUGZUAFQBVGDNDKHVQCHJTUZ

DEUTSCHLAND UBER ALLES IN DER WELT WENN ES STETS ZU SCHUTZ UND TRUTZE BRÜDERLICH ZUSAMMENHÄLT


CSLOMOGSHRVNBXACSRRTPRDNFRUYNAWPLOZUXOLOZUNCVAPDWVBXPRDNFRUYSRNUGWIOTAMMANZVLF

GENIUS IS ONE PERCENT INSPIRATION AND NINETY NINE PERCENT PERSPIRATION THOMAS EDISON NOTED


JMMQC JGNQ QGLI QFGNQ


TUWERWQTQNTHWPT


DDRYMKUNZXESDAFHARPDMJAAMOKKMJRYDBINYEDSGUYFARKAHONTWXGYSDNPMAFXQWLVBGMKAZMKIBUANBGUB

CONGRESS SHALL MAKE NO LAW RESPECTING AN ESTABLISHMENT OF RELIGION OR PROHIBITING THE FREE EXERCISE


QCPMLKSQPEKLKEFT


LEDHCPAFTGJXDNEHGFTANHGWLEDHCPAFTGJXDNEHGPPNOIPKVRZUPHHWPSJEALQIILIIYTJIUIPLFWPNOIPXWEDTTITTDWGWWAWLHMVHEIPXWESINPHWPSJEALYEXIGSFRTICDPR

WE SHALL FIGHT ON THE BEACHES WE SHALL FIGHT ON THE LANDING GROUNDS WE SHALL FIGHT IN THE FIELDS AND IN THE STREETS WE SHALL FIGHT IN THE HILLS WE SHALL NEVER SURRENDER


REAC HCOE CRXT HEAI TENR RREC SITO THIO NTSS IPOA PL

HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION


MGVS OQIIT AP CUAJC EGC NIDIGBIB GPJIV DIV UKHDIV FIJJIVC EIVI BIUABIB NS JDAMGC HDIFKHHIC

MARY QUEEN OF SCOTS WAS BEHEADED AFTER HER CIPHER LETTERS WERE DECODED BY THOMAS PHELIPPES


UVNE HLVER FSO HRQRS ZRFEH FXV VNE UFKAREH IEVNXAK UVEKA KADH SFKDVS

FOUR SCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH THIS NATION


WATHMALICETOWARDNONEWITHCHARITIFORALLWITHFIRMNESSINTHEZIGHTASGODGIVESUSTOSEETHERIGHTLETUSCTRIVEONTOFINISHTHMWORKWEAREINTOBINDUPTHENATIONSWOUNDS

WITH MALICE TOWARD NONE WITH CHARITY FOR ALL WITH FIRMNESS IN THE RIGHT AS GOD GIVES US TO SEE THE RIGHT LET US STRIVE ON TO FINISH THE WORK WE ARE IN TO BIND UP THE NATIONS WOUNDS


DFVGADADDDFDDDAAAAGGAAFAFV


DTIEEUNXZILAYIWHLLVHHKBXXLWKPIQKBELHVXJPHBLIXWIZSAHURAXVMBUYQIYTIZPBVYVQKOSXZCWVFMPEIPCPBWHMJQRDKQQZHEEMRZMXZIQMXZAHURAXPIHMXKMBVIPGYMPLMSMAHIOMJDZXEEB

ALL WARFARE IS BASED ON DECEPTION HENCE WHEN ABLE TO ATTACK WE MUST SEEM UNABLE WHEN USING OUR FORCES WE MUST SEEM INACTIVE WHEN WE ARE NEAR WE MUST MAKE THE ENEMY BELIEVE WE ARE FAR AWAY


GL KW ZCEGLLGLE GQ KW CLB YLB GL KW CLB GQ KW ZCEGLLGLE YQ RFC OSCCL MD QAMRQ ILCU UCJJ

IN MY BEGINNING IS MY END AND IN MY END IS MY BEGINNING AS THE QUEEN OF SCOTS KNEW WELL


ACPNTCTTIRELNILEIHHIENMAAPIAOLEVSSAIFHERNEDEPBKMFESFTTESAEISIRAUOTTTTFNXNALNEEEUTOGXEPICARCDERCX

AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS


⟨a29⟩ ⟨w32⟩ ⟨a01⟩ ⟨a01⟩ ⟨w14⟩ ⟨w32⟩ ⟨a13⟩ ⟨a29⟩ ⟨w20⟩ ⟨a19⟩ ⟨w28⟩ ⟨w22⟩ ⟨w20⟩ ⟨w22⟩ ⟨a01⟩ ⟨w32⟩ ⟨a07⟩ ⟨w20⟩ ⟨w08⟩ ⟨a19⟩ ⟨w08⟩ ⟨a01⟩ ⟨w26⟩ ⟨w20⟩ ⟨a11⟩ ⟨a19⟩ ⟨w08⟩ ⟨a25⟩ ⟨w10⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨a19⟩ ⟨w40⟩ ⟨a13⟩ ⟨a25⟩ ⟨a11⟩ ⟨a01⟩ ⟨w10⟩ ⟨w14⟩ ⟨w38⟩ ⟨w22⟩ ⟨w10⟩ ⟨a23⟩ ⟨a01⟩ ⟨w20⟩ ⟨a25⟩ ⟨a25⟩ ⟨w20⟩ ⟨a19⟩ ⟨w22⟩ ⟨a19⟩ ⟨w10⟩ ⟨w28⟩ ⟨a25⟩ ⟨w20⟩ ⟨w14⟩ ⟨w32⟩ ⟨a13⟩ ⟨a29⟩ ⟨w20⟩ ⟨a19⟩ ⟨w22⟩ ⟨a19⟩ ⟨w20⟩ ⟨w08⟩ ⟨a17⟩ ⟨w08⟩ ⟨w26⟩ ⟨a19⟩ ⟨w32⟩ ⟨a17⟩ ⟨w32⟩ ⟨a07⟩ ⟨w08⟩ ⟨a13⟩ ⟨a19⟩ ⟨w20⟩ ⟨w22⟩ ⟨w14⟩ ⟨a19⟩ ⟨w32⟩ ⟨a11⟩ ⟨w20⟩ ⟨a17⟩ ⟨w26⟩ ⟨w20⟩ ⟨w10⟩ ⟨w04⟩ ⟨w20⟩ ⟨a25⟩ ⟨a19⟩ ⟨w32⟩ ⟨w14⟩ ⟨a13⟩ ⟨w08⟩ ⟨a25⟩ ⟨a25⟩ ⟨w20⟩ ⟨a19⟩ ⟨a07⟩ ⟨a17⟩ ⟨w32⟩ ⟨a23⟩ ⟨a23⟩ ⟨w32⟩ ⟨w20⟩ ⟨w08⟩ ⟨a07⟩ ⟨a17⟩ ⟨a29⟩ ⟨w20⟩ ⟨a01⟩ ⟨a01⟩ ⟨w04⟩ ⟨w08⟩ ⟨a07⟩ ⟨w32⟩ ⟨a07⟩ ⟨a25⟩ ⟨a19⟩ ⟨w10⟩ ⟨a17⟩ ⟨w28⟩ ⟨w14⟩ ⟨w20⟩ ⟨a17⟩ ⟨a13⟩ ⟨w28⟩ ⟨a11⟩ ⟨a01⟩ ⟨w32⟩ ⟨w14⟩ ⟨w38⟩ ⟨w20⟩ ⟨w40⟩ ⟨w14⟩ ⟨a19⟩ ⟨w40⟩ ⟨a13⟩ ⟨a25⟩ ⟨w10⟩ ⟨w26⟩ ⟨a19⟩ ⟨w08⟩ ⟨a13⟩ ⟨a29⟩ ⟨w40⟩ ⟨w32⟩ ⟨a07⟩ ⟨a07⟩ ⟨w32⟩ ⟨a07⟩ ⟨w20⟩ ⟨a25⟩ ⟨w20⟩ ⟨w20⟩ ⟨a07⟩ ⟨w22⟩ ⟨w20⟩ ⟨a31⟩ ⟨w20⟩ ⟨a07⟩ ⟨a25⟩ ⟨w40⟩ ⟨w22⟩ ⟨w32⟩ ⟨a37⟩ ⟨w20⟩ ⟨a07⟩ ⟨a25⟩ ⟨a19⟩ ⟨w10⟩ ⟨a13⟩ ⟨w40⟩ ⟨w04⟩ ⟨w20⟩ ⟨w08⟩ ⟨w22⟩ ⟨w28⟩ ⟨a19⟩ ⟨w20⟩ ⟨w22⟩ ⟨w28⟩ ⟨a07⟩ ⟨w14⟩ ⟨w20⟩ ⟨a19⟩ ⟨a25⟩ ⟨w08⟩ ⟨w32⟩ ⟨a07⟩ ⟨a25⟩ ⟨w40⟩ ⟨w32⟩ ⟨a07⟩ ⟨w08⟩ ⟨a17⟩ ⟨w32⟩ ⟨w22⟩ ⟨a25⟩ ⟨a19⟩ ⟨w32⟩ ⟨a11⟩ ⟨w28⟩ ⟨a25⟩ ⟨w32⟩ ⟨w10⟩ ⟨a07⟩

HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION

Babington nomenclator: symbol tokens ⟨wNN⟩/⟨aNN⟩ used in the 1586 Babington Plot.


SKRRVRLZFUHVJFHGNFVFBRELWNQAYGHVKCTBWBFKZHLWMFIRPTPNIXHXMAVTZALEPEGFJZHFKXWLVULAC

GENERAL ORDERS NUMBER ONE ALL COMMUNICATIONS SHALL BE ENCRYPTED USING THE APPROVED CIPHER DISK


1309 02861 02284 5725 0403 05030 02606 00353 04492 1260 06288 05741 02832 02225 5712 0411 05052 02593 1942 5713 1584 05437 6600 01590 4440 00972 2877 01574 6013 01653 7631 5054 4737 05982 1605 06065 2864 04106 05067 3856 1654 01000 02859 5122 02599 1657 5740 06038

DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS


QAEMEGUAUMWDDDSUD


QTGLCYSUWFEUONKGSV


99999 90019 90017 90004 90000 90018 90020 90017 90004 99998 99999 90001 90020 90017 90008 90004 90003 99998 99999 90007 90004 90017 90004 99998


EIOLCGEGEININGZUSTHEVPRDFIFRHEVPRDZUQXEPEFSBFIDFTNGQFGFMCE

IN THE BEGINNING WAS THE WORD AND THE WORD WAS WITH GOD AND FULL OF GRACE


PZMIOXIACADOZH


BSWW IKUY KNGZ DXGD DCQP BZJQ FDKF AVTF ILQB CXMY ZPIK JHHB YIYH MOGH HXYA ZXXR QIWS UEUX

BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL A STRONG CLAIM NEEDS STRONG EVIDENCE


SBXMNRHHPNZLPFSAOYRMULFTMLPFSAOYZAYUPXBDGUTPXPRAYSAPALPFTKNKWPHNDBNJGVHEY

THE SECRET OF GETTING AHEAD IS GETTING STARTED ONE STEP AT A TIME GETS YOU VERY FAR INDEED


QOTYMPTZUWUNTEWDCHUTOJUVWUGARAVMMGIQYDLNUHETUDXAIFOXUZYIGMCIHTCYAEPUUGHUDYRVARQUOTDXUIFUDBECFDUWTEAVEHIKEUDEXDUXYKQZJJHIHYMYTTXLUMUIMYBERUMOXUMNOIPPZFOMINNYAKUHFIBSEZULR

WE HOLD THESE TRUTHS TO BE SELF EVIDENT THAT ALL MEN ARE CREATED EQUAL THAT THEY ARE ENDOWED BY THEIR CREATOR WITH CERTAIN UNALIENABLE RIGHTS THAT AMONG THESE ARE LIFE LIBERTY AND THE PURSUIT OF HAPPINESS


TBIKVIBVBMCTBGQVVUG


NTAHKZTLVYHREOAYBBS


WCGVOCGROGEMMGXVLSNVVAE


ICANDOALLTHINGSTHROUGHCHVISTWHICGSTREJGTHENETHMEINEVEVYTRIALANDTRIBULATION

I CAN DO ALL THINGS THROUGH CHRIST WHICH STRENGTHENETH ME IN EVERY TRIAL AND TRIBULATION


KKQHXOKFHAJBUEAUDPMTBLLGYYVNZKSKOHJGWTTAJNKKMDMRMPJZTRIVSNYQDEJQZEQPIXDXSMDJT

NAVAL UNITS IN POSITION OFF THE COAST AWAITING SIGNAL TO COMMENCE SHORE BOMBARDMENT AT DAWN


GIJXJXFMFHNBPUXRE


K r· L ¬ L X K └ L X X ┘· ─ X X r· ┘· ⌒ ⌒ r· L ┌· L K r· L ┌ L K r· ┘· Γ ⌐· ⌐ Γ· └ X K r· L K· Γ· ¬· L ─ L ┌· L r Γ· ┐· r· L ┌· X· X L X ⌐ ┌· L ┐· L ⌐ K Γ· ─ ¬· ┐ L ⌒· ⌒ ┘· ┌· Γ ⌐ K ┌· ⌐ ─ X ┐· ⌐ ┌· L ─ K K ┘· ┘· └ X r· ┘· X· └ Γ X r· ┘· ⌒ Γ· K X ┌· L ⌐ X ┘· ─ Γ· ─ ¬· X L r X· ┌· Γ· K ⌒· r └ ⌐ Γ· ┌ X X r· ┘· X· └ Γ ¬ L K L X K L Γ X· ─ Γ L ┌· X r ┌· X· K Γ· ─ ⌒·

THE BEST LESSONS SHOW WHERE THE METHOD FAILS THE VIGENERE CIPHER USES A REPEATING KEYWORD A TRANSPARENT TOOL SHOULD SHOW ITS REASONING SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY


52 48 28 67 37 83 60 43 60 67 26 46 75 86 76


TIGSEXYPAQOWP


WISDOEMTGAUGAERHDTS


WTP HAZVPUP XEZ GHXQPR QTW NFA MNLVJP TLQNXT PGCDKLI SV NNSLJBLRL UIW TIPKNOWA SNXUL VFCCN RBJJB QECR EMPR YGL QPV MCNNW LB MFNEP MFRNVWPV

THE MESSAGE WAS HIDDEN BUT NOT SECURE ATBASH ENCODES BY REVERSING THE ALPHABET BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL HONESTLY


AAAAA BAABA AAAAB AAAAA BAAAB AABBB AABAA ABBAA AAABA ABBAB AAABB AABAA BAAAB AAAAB BABBA BAAAA AABAA BAABB AABAA BAAAA BAAAB ABAAA ABBAA AABBA BAABA AABBB AABAA AAAAA ABABA ABBBA AABBB AAAAA AAAAB AABAA BAABA BAABA AABBB AABAA BAAAA AAAAA ABAAA ABABA AABAB AABAA ABBAA AAABA AABAA AAABA ABAAA ABBBA AABBB AABAA BAAAA BABAA BAAAA ABAAA BAABA AABAA BAAAB BAABA AABAA BABAB BAABA ABAAA ABBAA AAAAA BABBB ABAAA AABBA BABBB AAAAA AABBA ABBBA AAAAA BAABA BAABA AABAA BAAAA ABBAA AAABB ABAAA AABBA BAAAA AAAAA ABBBA AABBB AAAAA ABBAA AAABB BAABA BAAAA ABAAA AABBA BAAAA AAAAA ABBBA AABBB AABAB BAAAA AABAA ABBBB BAABB AABAA ABBAA AAABA ABAAA AABAA BAAAB AABAA BABAB ABBBA ABBAB BAAAB AABAA BAAAB ABAAA ABABB ABBBA ABABA AABAA AAABA ABAAA ABBBA AABBB AABAA BAAAA BAAAB AABAB AAAAA ABAAA ABABA AAABA ABABA ABBAB BAAAB AABAA AAABB ABAAA BAAAB AAAAA ABBBA ABBAB BAAAB BAABA BAABB BAAAA AABAA ABBAA ABBAB BAABA AAAAA BAAAB ABABA ABBAB AABBA AAAAA ABBAA

ATBASH ENCODES BY REVERSING THE ALPHABET THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS FAIL CLOSED IS A POSTURE NOT A SLOGAN

Bacon's biliteral cipher: each letter encoded as 5-bit A/B string.


MRCHSSEMGNFJCTMFKMFQEXLRRIHQKVJHOUVGYQOOHLLAEHZENJWWLMLWKLBPUTAMGHPKUNRIVREMW

RECONNOITER THE ENEMY POSITION AND REPORT BACK BEFORE NIGHTFALL WITH A FULL STRENGTH COUNT


PFBMRIGNOFLOFTSSYFBFNMPKSOFHKBAFSHFMUNUFBXBTAFSNTFSOSAHHSMGPPROOTRTTFSGMFRTSHANSOOZPBCZXECZXGZRSZPPUVXODBFCHFKHXNUTAUDTHDXXRRAOLNCWPCZCNWGNSIRSNZYXPABXCHSBPUZAFYUZZ

ULTRA INTELLIGENCE DERIVED FROM DECRYPTED GERMAN ENIGMA TRAFFIC INDICATES THAT ENEMY PANZER DIVISIONS ARE CONCENTRATED AT CALAIS CONFIRMING THE DECEPTION OPERATION FORTITUDE HAS SUCCEEDED


09908 09996 09993 09908 09996 09997 09902 09906 09993 09992 09900 09997 09902 09993 09907 09908 09903 09903 09992 09994 09997 09906 09901 09999 09908 09990 09999 09900 09999 09991 09900 09999 09910 09999 09999 09907 09908 09996 09993 09906 09919 09907 09907 09997 09999 09902 09991 09999 09910 09999 09900 09906 09913 09991 09996 09999 09906 09995 09993 09992 09999 09991 09906 09903 09907 09907 09908 09996 09993 09904 09900 09999 09997 09902

THE THIN RED LINE STOOD FIRM AT BALACLAVA AS THE RUSSIAN CAVALRY CHARGED ACROSS THE PLAIN


WVHHZBHGOSSRHDILBHDQSQJUIKKULOWEZALPMCWVFRNBRCILHRSYXDOMREZUZWXDNGPHLIRCTUBVLMXJTXILPNUYFRZLEWOSSWSEUUZLYSNGHGBMDSWVRPZWXDQLRCCCFVIPJNLIOSSWSEUUZOJKOSNNXDOMWPRCPEKZRZTEOYWEXGLPIYOVHV

THE FUNDAMENTAL PROBLEM OF COMMUNICATION IS THAT OF REPRODUCING AT ONE POINT EITHER EXACTLY OR APPROXIMATELY A MESSAGE SELECTED AT ANOTHER POINT FREQUENTLY THE MESSAGES HAVE MEANING AND REFER TO PHYSICAL CONCEPTS


LTGQODPKGIUGHUEFXFCYIMSYPLDFKOQLBFQMRCMLKRXFTQDERDLYXBADDBZXKFUZXBCLFEEDLYTDGUBD

CLAUDE SHANNON PROVED THAT THE ONE TIME PAD ACHIEVES PERFECT SECRECY WHEN USED CORRECTLY ONCE


RUSHAHOHJFLBWHQPYTXSZCTQEDRNMMWQTZYNQTWLSXVDQRFCSXRFAUD

BREVITY IS THE SOUL OF WIT AND TEDIOUSNESS THE OUTWARD FLOURISHES


SEGQAGOIQATHUBEHWESDIIDUWLVHPAEQISDHTOTECTNILARCWPDFOUBOCBGEWURRAVTFWKOSOI


ZYOUEVLUPAOCIOXTQFXGBHJFWKOCQLODYSWSZYZRGKHRXFIDTWHAELLUAXJECUBTHGYOACMQKAYLESFYIVLCOUKBXPE

HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS


PPXJMSETGMLGQRIRHBQIZ


PHEDPQRGXPWYBHTLPW


AVVN LFDV XNLI UIRU MFCN QSNL FRKV PATU NBVY LIKA ZDTH WXFE GHGX

THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY CERTAINLY

Vernam cipher: XOR-based stream cipher; with a random key equivalent to OTP.


XBXLCVXNLQNCSFDZGWOKY


YOWJPTSMYIJBMYKVIYGBNITPOTYMMTIJYAPYYMAPFBKYOMTFFTHJBEOFBPIYBEBHBQLIITXMJMKNOYMRO

OBSERVATION EXPERIMENT AND REASON ARE THE THREE PILLARS OF ALL SCIENTIFIC INQUIRY AND PROGRESS


IHPATQRDMLCOPKADEJVRWDTDEUICIREIXFVDKYMOGMRLOEGSNPJGXHJPAGXPPPXGNNZJZPLPKFSVCUXHTWEOENSHUJERGTFJSJUARACSJMTZQUJAUKGZRBXHFBEPWWWNWYBTGFWZQDESMECLXUBPWHQPTBFSDEAGWLVURHLZMPX

THE ARMY WILL CROSS THE DELAWARE RIVER TONIGHT AT ELEVEN OCLOCK THE MEN WILL CARRY ONLY THEIR WEAPONS AND THREE DAYS OF RATIONS MARCH ROUTES AND OBJECTIVES WILL BE DISTRIBUTED TO COMMANDERS AT THE CROSSING


ORFGKWUEJVMIQM


UCGTCOWODET


XBEFEERMODHB


WHENEVERANYFORMOFGOVERNOENTBECOMESDESTRUCTIVEOFTHESEENBSITISTHERIGHTOFTHEPEOPLETOALTETORTOABOLISHITANDTOINSTITUTENEWEOVERNMENTLAYINGITSFOUNDATIONONQUCHPRINCIPLES

WHENEVER ANY FORM OF GOVERNMENT BECOMES DESTRUCTIVE OF THESE ENDS IT IS THE RIGHT OF THE PEOPLE TO ALTER OR TO ABOLISH IT AND TO INSTITUTE NEW GOVERNMENT LAYING ITS FOUNDATION ON SUCH PRINCIPLES


AMPIJLXBMKDVBPSSQH


DDFAADAXDFGFAFADXDFFDAXD


KJLAJMJXHMJLAJMJTMJUJBLPLYZJUHXLAJNBYLJIULPLJUHXPOJMYQPYBDJBJMPVQHBDMJUUPUUJOCVJIPTTJPVYBDLHLAJUNTMJOJSNIDJHXLAJKHMVIXHMLAJMJQLYLNIJHXHNMYBLJBLYHBUIHUHVJOBVRTNCVYUA

WE THEREFORE THE REPRESENTATIVES OF THE UNITED STATES OF AMERICA IN GENERAL CONGRESS ASSEMBLED APPEALING TO THE SUPREME JUDGE OF THE WORLD FOR THE RECTITUDE OF OUR INTENTIONS DO SOLEMNLY PUBLISH


SKXFBDBOYRUZRUKZQXMUBYBWIRZZYUCUKDEUMUIVITWZVVITDPOEBDDTSKBCSKXKBEBKVBQEXXSIQLXZNM

HUMINT OR HUMAN INTELLIGENCE GATHERING RELIES ON PERSONAL CONTACT AND HUMAN SOURCES IN THE FIELD


08 15 12 04 16 15 19 09 20 09 15 14


⟨n03⟩ ⟨w09⟩ ⟨w19⟩ ⟨w13⟩ ⟨w10⟩ ⟨a13⟩ ⟨w13⟩ ⟨w09⟩ ⟨n03⟩ ⟨a06⟩ ⟨w23⟩ ⟨w19⟩ ⟨a11⟩ ⟨w13⟩ ⟨w10⟩


CTAI INKA IIIN OKAI NSHA RALS HEED YQOK ALOK ALOT AIND AINY OTAI NCHO LCHO LDAI INOK ALCT AIIN OXED QOKE DYSH EOLS HORS HAII NSHA LSHA LCHO LORO RSHE OLQO KEDY OTED YCHE DYQO KEDY YTED YSHA IINS HEOL OTAI INCH EOLC HORO TOLO TAIN AIII NRAI INSH ARAL CTAI INSH EDYC HOLD AIIN KAII INSH AIIN OKED YDAL KAII INSH EEDY DALS HORC HORS HORS HEOL LKAI INCH OLOX EDSH ALOT AINC HEOL SHED Y

THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES THE BEST LESSONS SHOW WHERE THE METHOD FAILS THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN


11 43 44 42 34 33 22 13 31 11 24 32 33 15 15 14 43 43 44 42 34 33 22 15 51 24 14 15 33 13 15 44 23 15 42 11 24 31 21 15 33 13 15 13 24 35 23 15 42 52 42 24 44 15 43 44 15 53 44 24 33 11 55 24 22 55 11 22 35 11 44 44 15 42 33 44 23 15 51 24 22 15 33 15 42 15 13 24 35 23 15 42 45 43 15 43 11 42 15 35 15 11 44 24 33 22 25 15 54 52 34 42 14 21 42 15 41 45 15 33 13 54 11 33 11 31 54 43 24 43 13 11 33 42 15 51 15 11 31 52 15 11 25 13 24 35 23 15 42 43

A STRONG CLAIM NEEDS STRONG EVIDENCE THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN THE VIGENERE CIPHER USES A REPEATING KEYWORD FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS


DEPLXAZHPCECLYDQZCXD


A-WOH LIN DZEH   /   TLA-GIN A-KHA BE-LA-SANA DIBEH A-WOH   /   YEH-HES KLESH   /   TLA-GIN DIBEH-YAZZIE AH-JAH WOL-LA-CHEE GAH


THEOQHCQHISMPFADSSYETRORTHETINUMNKNRLYEIBQMFRGSRDMRLDFDOSFTHRIGATAEH

THE ONLY THING NECESSARY FOR THE TRIUMPH OF EVIL IS FOR GOOD MEN TO DO NOTHING AT ALL


INMYBEGINNINGISMYENDANDKNMYENDISMYBEGINNINGASTHEQUEENOHSCOTSKNEWWELL

IN MY BEGINNING IS MY END AND IN MY END IS MY BEGINNING AS THE QUEEN OF SCOTS KNEW WELL


CBWEMIMHUWDXGVREWSWY


JMVGQEVTDPNDXDIA


CSAS XTMY IYRJ DRKP HUKI UOEB LBEB PGGF XLND VETV BZYE Y

CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING

Trithemius: progressive Caesar (shift = letter position); no key needed.


NWHZHOGAGELBCI


THE ARCHITECTURE SHOULD MAKE MISUSE HARDER

Morse code: dots and dashes; word-separated by / symbol.


YECOWURJENEEISVHNTZSCUEGFPMGFEITEYYVAGLXVLCRZCCVYVEYEBLYNTCAEKFGYVRPVLFOREOSWVHZICTPGAOOCNGVHXECKYKNPNLCGGNVBWVPKGCTDKFCTVMZEEVHZSPRPGLDFPCGDEMTJRLFTCEALPUUDTZWFCPKIYVQU

WE HOLD THESE TRUTHS TO BE SELF EVIDENT THAT ALL MEN ARE CREATED EQUAL THAT THEY ARE ENDOWED BY THEIR CREATOR WITH CERTAIN UNALIENABLE RIGHTS THAT AMONG THESE ARE LIFE LIBERTY AND THE PURSUIT OF HAPPINESS


BAAAA AABAA ABBAA AAABB AABAA BAAAA BAABB ABBAA BAABA ABBAB AAABA AAAAA AABAA BAAAB AAAAA BAAAA


AHJAH GAHAK HATSA HDIBE HMAED ZEHDI BEHYA ZZIEB ENODA IHDIB EHDZE HDIBE HWOLL ACHEE BETKI NAHJA HTKIN THANZ IEDIB EHDZE HCAYE ILTHN ODAIH DZEHT SAHMO ASIDZ EHWOL LACHE EDIBE HTHAN ZIELI NDZEH GAHDZ EHCLA GIAIH DZEHW OLLAC HEETH ANZIE TKINT SAH

GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY

Navajo Code Talker cipher: Navajo words represent English letters.


GLIKHPNYODBIUKSWHTMF


GABAB ZUZUZ QAZUZ GEZUZ XUZUZ ZUZUZ CAZUZ GAZUZ JAZUZ LAZUZ RAZUZ RAZUZ LAZUZ RAZUZ JAZUZ XUZUZ HABAB ZUZUZ QAZUZ GEZUZ XUZUZ ZUZUZ GAZUZ RAZUZ FAZUZ XUZUZ DABAB GABAB ZUZUZ QAZUZ GEZUZ XUZUZ ZUZUZ GAZUZ RAZUZ FAZUZ XUZUZ HABAB ZUZUZ QAZUZ GEZUZ XUZUZ ZUZUZ CAZUZ GAZUZ JAZUZ LAZUZ RAZUZ RAZUZ LAZUZ RAZUZ JAZUZ XUZUZ NABAB BABAB ZUZUZ VAZUZ BEZUZ GAZUZ GAZUZ RAZUZ XUZUZ CABAB ZUZUZ XAZUZ DAZUZ SAZUZ ZAZUZ XAZUZ XUZUZ ZUZUZ NAZUZ RAZUZ GAZUZ DEZUZ XUZUZ ZOBAB


DFQLOLSXBAMBUBPVQOKJWMGT


W9 S9 V0 U9 S6 B8 E0 U0 U8 S9 A6 B9 U2 G4 O7 W4 J8 U2 W5 Y8 N1 Y2 R9 D0 O4 F7 D3 J8 W5 E3 D4 Y8 Q6 K6 T2 O9 G4 K5 W4 D8 T2 U1 X3 Q5 G2 W2 W4 U8 V8 L0 J3 A5 Q6 H0 M4 L0 Z2 S6 V7 S9 A3 J8 J0 B8 J6 K2 A2 D0 G1 R7 N2 F9 S9 A7 A5 E3 Z2 G1 U2 P3 J2 K6 A6 Q6 P6 N1 G4 A4 N6 D0 B9 G2 W2 Q1 S6 N2 Y0 R9 N4 N6 J6 P3 K2 U0 A4 H9 F7 V0 U1 Q6 S9 Y8 U9 P6 K8 D8 E7 P5 J4 K2 J2 K6 R7 X4 I0 I2 H9 W6 V0 I4 Q5 H0 E6 J4 G1 A1 H0 F7 Z2 P5 J4 C5 V6 P6 J9 A7 K5 R0 E3 L0 P3 I0 A4 W2 T2 L0 N6 P5 M1 D6 G4 S6 Y8 H3

IN THE SEVENTEENTH CENTURY ISAAC NEWTON SYNTHESIZED THE WORK OF COPERNICUS GALILEO AND KEPLER INTO A UNIFIED THEORY OF GRAVITATION THAT EXPLAINED BOTH THE FALL OF APPLES AND THE ORBITS OF PLANETS


76 80 82 72 59 82 29 52 43 68 29 68 57 43 61 50 61 52 68 29 80 82 95 82 68 57 89 82 68 55 52 50 65 36 82 80 61

FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS

Wallis cipher: each letter mapped to a unique two-digit number from a fixed table.


UMMVANWOVTGPRQGGRIMOTWOOIPXOVVQPBMSKRZMREIVBIQRGVDCRGTYUMYWFGPKKTTSTQCESSUUPMIITKSTA

SIGNALS INTELLIGENCE OR SIGINT INVOLVES INTERCEPTION AND ANALYSIS OF ELECTRONIC COMMUNICATIONS


UTZYQAIDSETSYWKMPJWTFFECOYPNXFZMJDSZOECAKLRPNALSYCETSZMZVGMSOFWVLOVPWBZFLTBQWAEESWHQREJ

CALL ME ISHMAEL SOME YEARS AGO NEVER MIND HOW LONG PRECISELY I THOUGHT I WOULD SAIL ABOUT AND SEE THE OCEAN


FAQVBGPLLHLQAROAAHFXSTWVKGBKTQHFWLHDUTPATWLHJVHMKDAQATWLSTXFBABAXAVURIPRLUHLFUGBKTQHFQLADQRSMQVHGQXIAQBKFBKOQAKRLFQQRTALOQPQRSDADUOBKTVHARLFUJVRELVHLAOURFXFAQABRIUJPSAHTBKJVLBBHLFUSTWBKHHATWLHARN

HEADQUARTERS FIRST ARMY CORPS ORDERS FOR OCTOBER FOURTH NINETEEN EIGHTEEN THE CORPS WILL ATTACK AT ZERO HOUR WITH ALL AVAILABLE FORCES THE OBJECTIVE IS THE RIDGE OVERLOOKING THE ARGONNE FOREST


QGDTAKGUHFIQXEI


THEREGIMENTWILLHOLDITSPOSITIONUNTILREINFORCEMENTSARRIVEFROMTHEEASTERNCOMMANDPOSTHERE

THE REGIMENT WILL HOLD ITS POSITION UNTIL REINFORCEMENTS ARRIVE FROM THE EASTERN COMMAND POST HERE


TKBQJRDJNDXVKTBWMRUIDR


BVCXIVQUIDTPLKIFWHACNOGCUGOOE+FCESROAGVIRLRYE+GLJHFXIAPWFXEJFSSZHTACCUIKL+HOJ

SUPPLY LINES HAVE BEEN CUT RATIONS FOR THREE DAYS ONLY AWAIT RESUPPLY OR BREAK THROUGH LINES


ofdo koygo dxg dg yodxoq qzakyird gqorxhqdxxi adffzl ykvkfd kryknkg ndq gigol qilorol

ALEA IACTA EST ET CAESAR RUBICONE TRANSGRESSO BELLUM CIVILE INCIPIT PER TOTAM ROMANAM


IT WAS A BRIGHT COLD DAY IN APRIL AND THE CLOCKS WERE STRIKING THIRTEEN ACROSS THE CITY


KEWX FPA KEA


VHSNDKCKRRIQVPKJXIMZSSCUMHCBEVNDGSXQZHEZFOFFOHFCXQSSCUSNCTYSVEEWDLMHFWLRWWOCMPDZNXDZRIYOSSCUMQCBEVNDIOLVDZWMGDGOUKHMQURHEWIMCUVDFFKMHMVHXJODNXGOHDRDLPGEFFHMLAQM

IMMANUEL KANT PROPOSED THAT WE SHOULD ACT ONLY ACCORDING TO THAT MAXIM BY WHICH WE CAN AT THE SAME TIME WILL THAT IT SHOULD BECOME A UNIVERSAL LAW THIS CATEGORICAL IMPERATIVE DEFINES MORAL DUTY


SMBWQHZRIKUAEBNHWSEUBRFSHEBRFSMEECQL

THE ONLY THING WE HAVE TO FEAR IS FEAR ITSELF


PBJNEQF QVR ZNAL GVZRF ORSBER GURVE QRNGUF GUR INYVNAG ARIRE GNFGR QRNGU OHG BAPR

COWARDS DIE MANY TIMES BEFORE THEIR DEATHS THE VALIANT NEVER TASTE DEATH BUT ONCE


UMGLFIGDTWSISCTSSHWMILRXQYJLHVEQGLWZOXDYXRPBT

SERE BREVE PORQUE LO QUE TENGO QUE DECIR ES IMPORTANTE


77 28 86 34 56 75 28 48 45 24 63 29 79 45 64 76 25 56 45 24 65 58 47 52 26 66 65 48 46 24 97 46 59 34 56 74 27 49 72 43 84 59 60 35 25 97 46 49 32 57 84 47 79 44 26 63 59 68 32 36 63 59 47 32 36 105 25 47 66 45 66 25 58 35 23 75 38 68 73 36 67 47 46 56 45 74 38 48 66 33 64 25 50 36 36 67 47 58 33 57 76 29 80 35 57 84 38 77 34 26 94 28 79 54 57 85 28 46 66 44 64 59 47 56 47 93 38 46 33 25 76 37 48 45 24 97 38 50 45 55 103 26 70

FOURSCORE AND SEVEN YEARS AGO OUR FATHERS BROUGHT FORTH ON THIS CONTINENT A NEW NATION CONCEIVED IN LIBERTY AND DEDICATED TO THE PROPOSITION THAT ALL MEN ARE CREATED EQUAL


MSTOMGWOLEMMMERNZFWSCOFLTFVPKEQHNPSAWRWGZMFYGEXNRVIJMRPULRGSCEYXXIHRQYJXXWYJLSWRRCFYTQOCLEMQNGWDMGUWGFKPVVBYBHWUIFDJUEOZDXIZSRWZJJPUCFFYCIQGOKPZAPTQTUQXDLGCGYHL


SEEBE NBEESQGWBA OAQ RRGSQGWBA OER THAROZSAGOY GB FRQHES FLFGRZF QBHPYR GEOAFCBFWGWBA OCCYVRF QBYHZAOE SAPELCGVBA GJWNR GVR ZRFFOTS JOF VVRQRA PHG ABG FRQHES

ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE THE MESSAGE WAS HIDDEN BUT NOT SECURE


64 60 02 05 07 09 14 14 09 14 07 07 15 04 03 18 05 01 20 05 04 60 08 05 01 22 05 14 61 60 05 01 18 20 08 61 04 01 18 11 14 05 19 19 23 01 19 21 16 15 14 60 06 01 03 05 62 04 05 05 16

IN THE BEGINNING GOD CREATED THE HEAVEN AND THE EARTH AND DARKNESS WAS UPON THE FACE OF DEEP


KDODMIECNNLSAOOEVYCCWIRFIHORYINGWIASYTAFOEENTTTONLEPNRNKIIOT

KNOWLEDGE IS POWER AND INFORMATION IS THE KEY TO VICTORY IN ANY CONFLICT


VVENLGEEIIMIOQALNLLNDCASCUDIIETIIICAIEENSBTVIWRAA

VENI VIDI VICI I CAME I SAW I CONQUERED ALL IN A SINGLE BATTLE


D4 V3 C7 U9 E6 J4 M1 H0 A4 J6 R0 K8 C1 G4 O7 W4 V3 I0 B9 E6 J8 I4 U8 B8 D4 B9 O4 U9 D6 J4 G1 N6 M7 V2 W6 O7 N4 M8 Y8 I4 R7 A2 P6 I5 G2 A3 G4 J6 J6 Y0 I2 P9 M8 G2 T2 V8 U8 H3 Q1 K2 J4 M1 N6 D0 J6 U9 Y8 D0 W5 W2 W6 V4 N6 A3 V4 J4 X4 O4 F5 M8 X4 D0 S9 K5 U9 S6 V6 H9 J3 V4 B9 O7 T2 D4 S6 T2 U9 K2 G1 A2 N6 A3 J6 Q1 H9 A4 W5 V0 R0 R7 U9 J2 M1 M1 T2 D4 B9 B8 Q1 K2 A2 J4 W5 Q5 U0 Q5 Y0 T2 N1 Y2 G3 E3 I5 G2 R7 Y0

WE SHALL FIGHT ON THE BEACHES WE SHALL FIGHT ON THE LANDING GROUNDS WE SHALL FIGHT IN THE FIELDS AND IN THE STREETS WE SHALL FIGHT IN THE HILLS WE SHALL NEVER SURRENDER


IAYTPRDTDVUKJJVWKSBOEOKKEHLSPGUVKWDELZRZFGRNTGVKFFPJSRZOFBKKWHZZWHAICFEEUR

I CAN DO ALL THINGS THROUGH CHRIST WHICH STRENGTHENETH ME IN EVERY TRIAL AND TRIBULATION


90 55 63 56 81 24 49 53 54 91 90 59 25 63 33 56 82 91 90 61 54 53 56 91


VQZNIIIFWXVNITXXWIUXPJKIABYWCWZCGVPRZCXBZIBSCDYEWSLNQGXJJPESNRDLUIJMDRZDMO

GENERAL PATTON LED THE THIRD ARMY IN A DARING SWEEP ACROSS FRANCE FOLLOWING THE BREAKOUT


T+MUELSEIZXBCGLSJGXT


YLQWELRRWXVDOACVSOOZYZGTZZZAXSYVYOWPXNPYGNHEV

NEVER INTERRUPT YOUR ENEMY WHEN HE IS MAKING A MISTAKE


SUPPLYLINECOMPROMISED


805 813 800 861 815 844 853 859 999 826 854 999 857 823 812 999 852 814 807 824 847 853 843 807 801 835 999 844 815 999 865 826 820 814 841 814 852 814 999 801 839 811 999 811 813 807 853 872 847 858 854 999 826 857 855 813 835 815 999 859 823 812 999 801 852 806 823 826 858 814 806 859 862 851 813 999 856 821 844 861 834 809 999 836 802 831 814 999 836 824 854 861 854 814 999 821 801 852 810 814 852 999 858 822 813 999 815 852 825 814 811 836 801 839 999 859 812 855 859 999 861 854 814 856 999 857 821 814 999 826 841 811 814 869 999 843 815 999 807 844 825 841 808 824 810 812 841 808 813 999 859 842 999 812 856 857 825 838 802 859 813 999 831 814 874 999 834 814 841 818 857 823 999

BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF THE ARCHITECTURE SHOULD MAKE MISUSE HARDER THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH

Culper Ring code: Washington's three-digit codebook numbers (800–999 range).


UFFBWDAMFKQDQOLRJKMO


34 43 65 59 55 59 75 47 86 66 28 27 65 37


SLHFOQHWCB DCWBH QVOBUSR


JMBTGJPYTBPIPTGJA


THESGOTHEARDROUNDTHEWORLD


NINKTBTILDQUNIBDGIUSTBTNINDNLONIBATDQIUZECHDALHIOEKIWERPGFHDALZECAYIPXDDNPACRE

SCIENCE WITHOUT RELIGION IS LAME AND RELIGION WITHOUT SCIENCE IS BLIND SAID ALBERT EINSTEIN


DGDFDAAVGAVDXVXVGXDADVADFAADAADDVAADAFFAFAFDAGADGFGGDXDGVDDVFGGVADADXAVGXXFFVGAGFDAFDFGFADGVDFAAAFFFFAGAGAFGAFADAAGGFDGAFAFADDGDVDVDVDXDVXXAAGAFDFVXVVVD

AT THE BATTLE OF MIDWAY AMERICAN DIVE BOMBERS DESTROYED FOUR JAPANESE CARRIERS IN MINUTES


DRIDIWPCPOOSONIREFMJYGKTGOJQAXFYZEEFBIDCOKJXYGKFYAVREPNAKWOKTAALUJCZODUXSAFFIR

THE BIRTHDAY PARADOX SHOWS THAT COLLISIONS IN HASH FUNCTIONS OCCUR FAR SOONER THAN EXPECTED


THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF


GSSF ZJJJ NALE RNMG GZYB FUYI RZNE SHQR LEYD JAQB YVTK TQCD CDHY CWNJ EAWQ GETZ PQNU BCFL WTMQ EFQI KCDA AENF UAEE ZBXC XVBO IQJK LLJM FBBG IJSD IVJD SPGZ CHNE IZA

POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY ATBASH ENCODES BY REVERSING THE ALPHABET CERTAINLY


XMNRCOTJRNAESFHOL


OUEXSNWQNVOSCXVWNAKBDFVRAIHEJAUDKTYZYUDSLWUEFLNHLUHKEJNGUEUZXMVJHGCKTBLCKHKJDRWX

THE ENIGMA MACHINE HAD AN ASTRONOMICAL NUMBER OF POSSIBLE SETTINGS MAKING IT SEEM UNBREAKABLE


YCRDPIYBTQQDSEYTYP


MBGUVGHFYBGMNVVGXPWTOKRPGKGTALVZVTXVPTMWGBCTVJGBNLNQBGTCVTNQKBGMNFGILTGWAVGALJNMPO

HUMINT OR HUMAN INTELLIGENCE GATHERING RELIES ON PERSONAL CONTACT AND HUMAN SOURCES IN THE FIELD


WQPIXTSKWQNMPWSTAHRSPF


MTOPYDUMPPENPAVYLYFUXKICFUEVAHORLMEMUQXYTZAFUHLWEJIFOELISYQOKUNGURFEMTAQQITOP

THE POWERS NOT DELEGATED TO THE UNITED STATES BY THE CONSTITUTION ARE RESERVED TO THE STATES


QLPBPMAPHIFTUNLAPBFFSBAPATHLSTHSPTFNHHSQPIIPHBAPITHQHUTNHPMLNHSOHBSHBUFFMXS

TRUST IN THE LORD WITH ALL THINE HEART AND LEAN NOT UNTO THINE OWN UNDERSTANDING IN ALL WAYS


the right uout sentence they now only our number each


8.1.3 1.6.5 13.1.1 16.4.10 11.4.6 12.6.4 17.3.8 19.6.1 19.3.10 18.1.9 3.4.10 1.1.2 14.6.5 1.6.10 11.1.2 11.5.5 4.3.9 1.4.7 7.3.8 8.4.9 20.5.8 12.6.4 12.4.2 13.1.10 3.5.4 6.5.6 12.4.3 18.3.2 4.5.10 1.4.5 7.2.6 3.4.2 14.1.8 5.6.8 6.4.7 14.4.2 8.1.8 2.5.10 3.4.10 12.4.2 3.1.1 15.3.10 8.6.2 1.2.6

GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY


FUXIUXK IUXKXWNKX DX XBI NK YKTOR NK FUBIJNXGXK DX YN YN BQQ IN IUX VQNKD NW VNY WNK IUX XBKIU TJ IUX QNKYJ BOY IUX WHQQOXJJ IUXKXNW IUX FNKQY BOY IUXD IUBI YFXQQ IUXKXTO

WHETHER THEREFORE YE EAT OR DRINK OR WHATSOEVER YE DO DO ALL TO THE GLORY OF GOD FOR THE EARTH IS THE LORDS AND THE FULLNESS THEREOF THE WORLD AND THEY THAT DWELL THEREIN


HBLRTAPIABBEMDVPASAE


RESDEZLOXUWGYZ


GUR IVTRARER PVCURE HFRF N ERCRNGVAT XRLJBEQ

THE VIGENERE CIPHER USES A REPEATING KEYWORD


DLNEAOTDMALENESTEXXL


IGRSXRRICMMRYMMQNHZHKBLHMEFLOTEOXRNRJWKCSMLZHDSLGWQDLQLOXXLBCOJMMQNH

ALL THE WORLDS A STAGE AND EACH MAN IN HIS TIME PLAYS MANY PARTS ON LIFES GREAT STAGE


GUR YVOENEL CERFREIRF XABJYRQTR SBE GUR PBZZHAVGL GUR NEPUVGRPGHER FUBHYQ ZNXR ZVFHFR UNEQRE OEHGR SBEPR JBEXF BAYL JURA GUR XRL FCNPR VF FZNYY CBYLNYCUNORGVP PVCUREF HFR ZHYGVCYR NYCUNORG FUVSGF

THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY THE ARCHITECTURE SHOULD MAKE MISUSE HARDER BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS


67 86 54 47 69 75 86 80 65 48 78 65 56 89 58 58


108 178 170 154 125 103 117 172 172 166 163 100 135 102 140


THANZ IELIN DZEHS HUSHT KINMA ETKIN BEMOA SITKI NCLAG IAIHL INDZE HGAHM OASIA KHANA ASTSO SISHU SHTKI NTSAH DZEHD IBEHW OLLAC HEECL AGIAI HAKHA DIBEH YAZZI ETSAH ASZIH SHUSH TKINN ODAIH DIBEH DIBEH CAYEI LTHNO DAIHW OLLAC HEEGA HDZEH GLOEI HTKIN THANZ IE

THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH


WKDGGLVKUHQLBFSYK


DLJRR TYKZQ ZDBPP XKRYK OHQGZ DPERS QRNNP FELYV UQJVZ QQNSC IYYPG YJQYP MUIHK PCPIX UJAWI WKSCV QXJNY ISZJX TZITI GJPXE SPNXJ KGWUQ VKILM HDHYU ARK

GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION THE VIGENERE CIPHER USES A REPEATING KEYWORD

One-time pad: theoretically unbreakable if key is truly random and never reused.


BSZOQDEBOXXCXCTUQABQYTACQNBHGIIDTOIQXNQOPTSYQONHGVBECGQOCQANNIKUBDSGAIFAKTCQOPIMCQQONQAQHENAIVNIDLAGTUKDQNBHQOAQCXYTTWPDBSZOYTOPDGCXBCDQSOGHBZGSXI

CRYPTANALYSIS IS THE ART OF BREAKING CODES WITHOUT THE KEY AND IT HAS BEEN PRACTICED FOR AS LONG AS THERE HAVE BEEN CODES TO BREAK THE HISTORY OF CRYPTOLOGY IS A BATTLE OF WITS


02 12 15 15 04 19 23 05 01 20 61 20 05 01 18 19 20 08 05 19 05 01 18 05 23 08 01 20 09 15 06 06 05 18 25 15 21 06 15 18 60 04 05 06 05 14 19 05 62 15 21 18 09 19 12 01 14 04 14 01 20 09 15 14

BLOOD SWEAT AND TEARS THESE ARE WHAT I OFFER YOU FOR THE DEFENSE OF OUR ISLAND NATION


TEBAFSRYQ HFRF N QVTVG FRDHRAPR NF GUR ERCRNGVAT XRL RIREL FLFGRZ ARRQF NA UBARFG GUERNG ZBQRY

GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY EVERY SYSTEM NEEDS AN HONEST THREAT MODEL

ROT-13 is Caesar with shift 13 — it is its own inverse.


PELC GBTE OCUL ENJO ERFC OGVS AQSO ARPO ERSH YGVV AXVA UXRE PXVB STFC EVAQ VCYR FOLF GURF LFGR ZZHF GPRF RQHE RSIN AVSS ANZL XABJ FOYU BENG UZSO NYNY BFSN VFOC BFGH ENAB GOFY BTOA VARR KBSQ BVAQ VRSA NSZN OFHE RFYR GGRE TERD HNAQ LRVF GEVP HGNB A

CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM FAIL CLOSED IS A POSTURE NOT A SLOGAN INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION


CHMTT OELLY NEYOE LARDM FLSXX PYOAE SSSTR TRWAX XCHCT NEICA SEEEE XXINW RECAL HCSOT SXXSH RBUWC IHRRK EMXXA KSUIY P

CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL


WILLIAM FRIEDMAN WHO BROKE THE JAPANESE PURPLE CIPHER MACHINE BEFORE THE SECOND WORLD WAR ALSO COINED THE TERM CRYPTANALYSIS AND SPENT HIS CAREER AT THE SIGNALS INTELLIGENCE SERVICE BUILDING AMERICAN CODEBREAKING


859 822 813 999 826 839 809 813 871 999 843 815 999 808 843 824 839 807 824 811 814 839 806 812 999 825 854 999 802 999 862 854 813 817 861 835 999 807 834 861 813 999 800 857 803 801 854 821 999 812 840 807 842 810 814 856 999 805 873 999 851 813 865 814 853 854 825 840 819 999 859 821 813 999 800 833 846 822 801 805 813 857 999 859 852 801 841 855 847 843 856 824 859 825 842 839 999 808 826 847 821 812 851 855 999 853 812 802 853 851 802 839 819 814 999 833 814 858 857 814 852 856 999 866 824 858 822 843 861 859 999 855 862 803 856 857 826 859 861 857 826 844 841 999 857 823 814 999 804 813 855 858 999 834 813 854 856 844 839 856 999 854 821 844 867 999 867 822 814 853 813 999 857 823 812 999 836 812 859 821 844 809 999 817 801 825 834 854 999

THE INDEX OF COINCIDENCE IS A USEFUL CLUE ATBASH ENCODES BY REVERSING THE ALPHABET TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION THE BEST LESSONS SHOW WHERE THE METHOD FAILS


TTHEAEVOREYENALCEOUTHEOMRRIMENSEETAIADREECUIDVDECCYDSMSPCEIRATLSEAESOESSTOSHHRTSRUDURBNBNETATDIEWNYXCRMSOLCEFVENHECRHSMXHEAEBEEFIEMHRLASYEAXISKHSECODRNOECLTMCTX

THE ARCHITECTURE SHOULD MAKE MISUSE HARDER OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE EVERY SYSTEM NEEDS AN HONEST THREAT MODEL CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS


XFKWRLLFYU


QANHXYNAR TU QYN XPLAQ


QSZOJFIMFNRHEBYQUQWXAFNACMYRIIEULBYSHJMDHPWLHJYTQCUPWZTBKHEWYYBKMVCYILWPDVUDHVSAQPQSLJTZDBGUZJWUSIXEELJPOLPCKBLHVOZQWMLOADDBOULXFFBVLAKF

WE SHALL FIGHT ON THE BEACHES WE SHALL FIGHT ON THE LANDING GROUNDS WE SHALL FIGHT IN THE FIELDS AND IN THE STREETS WE SHALL FIGHT IN THE HILLS WE SHALL NEVER SURRENDER


YPCHO LDARA LOKEE DYOTE DYOKE DYQOK EEDYD AINYL KAIIN KAIII NSHAL QOKEE DYYTA IINDA INYDA LSHEE DYCHE OLCHE DALKA IIINY KCHEO LOTOL OTAIN CTAII NRAII NOTOL OTOLK AIIIN SHORD ARALS HEOLD ALYTA IINAI IINSH EDYQO KEEDY DARAL SHEDY OKEED YOKAL OXEDO KEDYS HARAL DALQO KEEDY CHOLD AIINL KAIIN RCHEO LSHOR SHARA LQOKE EDYRA IIN

A STRONG CLAIM NEEDS STRONG EVIDENCE ATBASH ENCODES BY REVERSING THE ALPHABET DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS


WNRDICTRBNZFDYTNDXKEDMYJFMVUOFIXINDRXZYFTJFINQRSMPILHTIPDJOUSQOQPCJKYQOPSOAGXYJOZGUCWPUUJMPYAATJMYDYSGUJSREDAIIXIYSBUASKBXWXRAZNCLBLZMTMOYSXVZQXNDFMPHOYVJHSWVWIP

YESTERDAY DECEMBER SEVENTH NINETEEN FORTY ONE A DATE WHICH WILL LIVE IN INFAMY THE UNITED STATES OF AMERICA WAS SUDDENLY AND DELIBERATELY ATTACKED BY NAVAL AND AIR FORCES OF THE EMPIRE OF JAPAN


DTYENTOREQFEYPGUPYVIOWAFTILUIWMNOCEFAEWKYSFUYNPHEUFNOYGTMYVLJAEPYDJODGUYWMSOEL

SCIENCE WITHOUT RELIGION IS LAME AND RELIGION WITHOUT SCIENCE IS BLIND SAID ALBERT EINSTEIN


GEKREIKWDSUKTCYGCQMILOECDPNPTFYSCBNKRNDPPRTSUYWUXEPFNKMQMDEGMAWXCKBLFJMAFMCBWUDXPYAUMIYZ

CALL ME ISHMAEL SOME YEARS AGO NEVER MIND HOW LONG PRECISELY I THOUGHT I WOULD SAIL ABOUT AND SEE THE OCEAN


SODZQQPTJFVKRMFXODZQQHHETAZSILSPTKZKMRLREP

GIVE ME LIBERTY OR GIVE ME DEATH SAID PATRICK HENRY


147 161 131 179 143 154 125 100 167 180 117 116 174 119 119 160 143 175 129 143 138 125 174 152 119 112 173 177 169 174 166 169 146 114 161 176 109 117 125 179 146 129 100 170 173 168 136 110 107 143 169 151 114 140 155 169 147 175

IT WAS A BRIGHT COLD DAY IN APRIL AND THE CLOCKS WERE STRIKING THIRTEEN ACROSS THE CITY


FQBLGFQYGMGBNDXIWLTRGIJCJYLMEIHYA

DIME CON QUIEN ANDAS Y TE DIRE QUIEN ERES


GXDFDGAFGADVVGGVDGGGAFFGAVDVADDAADDADFXADDAGXDDGGAAAXGFAAGFDVDVFDFDGFGAFAAVGVDXDFDFAXAVDFGFAGAFFAFGGAVAXDFFVAAAVDDGFDDDXAFDGGAGVDVVAGFAA

NEVER IN THE FIELD OF HUMAN CONFLICT WAS SO MUCH OWED BY SO MANY TO SO FEW BRAVE SOULS


QUNTF TFE RPVEM MEVERKNRE TFE AGRC SPT NM TFE AUST NB OPJJPS HUST PANVE KY LFPKAER CNNR

QUOTH THE RAVEN NEVERMORE THE BIRD SAT ON THE BUST OF PALLAS JUST ABOVE MY CHAMBER DOOR


KAII INOX EDCH EOLC HOLS HAII NOTA INKA IIIN CHED YSHE DYYK CHEO LSHE DYCH OLOK EDYD ALOK ALYT AIIN QOTE DYYK CHEO LOKS HYOK SHYC HOLD AINY OROR CTAI INOK ALYK CHEO LOKE EDY

ATBASH ENCODES BY REVERSING THE ALPHABET HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION SLOWLY


DGGAXAADFFFXDGADXFXDFDDFDAFADADDAA


QDOZALLOPISHKQWMIFNOGWSNORDKORIRVSKLFEGSRYBLKHKUHLSHIRRIPFCQIHITBRDGKQKSEUAPWAPYIN

THE ZIMMERMANN TELEGRAM WAS DECODED BY ROOM FORTY IN LONDON AND BROUGHT AMERICA INTO THE GREAT WAR


25 88 23 80 82 43 59 50 80 49 22 53 82 40 49 70 27 68 66 45 99 46 66 81 62 43 58 22 63 48 27 68 33 64 68 3 93 57 58 82 4 50 93 15 87 93 63 88 48 34 91 48 53 68

THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT


IPIRFNIESGTJDSYMXBXR


TIGD VHNP BNME GESH XFME XHWH CLIT WVIM GYLN BNMR GPHJ ZBZO AARG EBNS LFHL BKIE TEST FFKB NDKK QHNE GASK IVQW MTPR BRUD WTMP NBQK EUVH VKXL YDOY OLRX IKJB VPPF MMCS ASXT MYIY RJDR KPHU KIUO EBLB EBPG GFXL NDVE TVBZ YEY

THE ARCHITECTURE SHOULD MAKE MISUSE HARDER CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING


WM TNM OSIA OQSPP TO UNMTFO TNM FTUM JG TGU JSN EBQQEM EBPM BO NJSGUMU WBQA T OEMMK

WE ARE SUCH STUFF AS DREAMS ARE MADE ON AND OUR LITTLE LIFE IS ROUNDED WITH A SLEEP


KASRVPUSRDDOSFHBRSLRHFABVTARVTGVPVXWNEGGWZAEFP

I HAVE NOT YET BEGUN TO FIGHT SAID THE CAPTAIN TO THE CREW


UN+DJPCHCVFCPVHHMJ