YSAQWMWGCEXJJNTQTPPIHBFAKPJYWWAUKHGFKVPUXDSSTVPQXZDSQDMWVUWYSHVFOLFRTDJSYXZWBIEOBPJWWKJIWVGSPOBDTYTNADVFEORAQETBSMUQSZZHJXHECKTKDDHZKHDGTGRWBCOFKVKSOMYTVDFIKNRESEAAISOXG

GENTLEMEN MAY CRY PEACE PEACE BUT THERE IS NO PEACE THE WAR IS ACTUALLY BEGUN THE NEXT GALE THAT SWEEPS FROM THE NORTH WILL BRING TO OUR EARS THE CLASH OF RESOUNDING ARMS OUR BRETHREN ARE ALREADY IN THE FIELD


GQB+NMIRUODHLEMFE


42 72 58 22 39 83 72 63 58 28 10 22


IPNCWZ QISRZ HPCW


DGAVGAGDDGDGVXGGXFAF


BSPZFGFQWBPFFWZNRSFQRNNGXSTCSNYNBGLJPSXYXBIWCRLAPPOYXHXFPTQMPYQEFZGMKUIKHOIWQYGETCNEPUELRROOCKADLSCMNAJIZVNXOTOKUTCWFFSWOQYAHZLSRPXZTXBSGRXDIYHTCRAHEVYQSYKBJJNBZHVAMLGIB


ASEFLPIHOLTUOZOMQOROFTPBRDNKWNUZOXMHKNCONKUCOTQEPOQODUENAQTENHXRRPENPXXBIRTONDUWRQUROZ

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


OHMWQQLWUOSQ


GIYUSXTHACXJUBRQHFSOOWGTNOBIRHXMLWAXXJUCFEGIJRWMLGDSFZWYWICXPQDWLPGPRZXMFBPSHD

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


02513 02922 3854 3803 0999 02838 05066 02601 01581 5747 6633 6021 1653 6057 03855 02863 4483 01666 0387 5695 00402 03788 2280 01577 00679 05748 0343 06283 4803 1595 04430 0991 5730 07929 05089 6308 0653 3837 04751 1029 3551 6055 4755 1960 3856 01639 06304 6358 1607 05750 6026 0631 01636 00332 6687 1974 4807 5740 6288 02902 5983 6332 02513 1657 5661 01624 00995 2924 5067 5652 04805 00955 00345 03841 4797 1933 6953 2835 02225 01643 04455 01635 05685 1644 0328 4492 01266 1297 1615 0964 5675 7855 05075 6364 06053 2893 06327 6016 1613 3806 01911 00949 00387 01628 06011 00351 05689 6030 02521 02826 01932 06324 1598 01339 06292 02559 1601 0380 3858 05038 02541 00413 00652 01653 06324 00684 07911 06317 2581 05738 1581 1579 5061 04750 6002 02901 6305 02835 04769 4434 05972 1927 0381 02832 3785 0949 3795 04727 5978 1595 1292 02886 6025 00399 5123 4770 6003 06303 6623 5726 01665 04421 04722 06321 0342 06018 03825 4743 2255 00322 4427

HILL CIPHER USES LINEAR ALGEBRA TO ENCRYPT BLOCKS OF LETTERS BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS FAIL CLOSED IS A POSTURE NOT A SLOGAN

Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher.


YQOKYDPAHIFENYISCEDCEBCDEFOBYUNEBEOFORZJVYDHUFAKAHAGQLIDY

ELEMENTARY MY DEAR WATSON THE GAME IS AFOOT AND THE CRIMINAL IS CLOSE


3087 1700 1887 2333 2144 1634 2836 1887 1700 2761 1700 2836 2670 2918 2836 1887 2761 2836 2333 1489 1700 2761 1700 2144 1762 1700 3014 1953 1634 1700 2271 2836 2836 1887 1427 2836 1427 2144 2144 2207 1700 2271 1427 2670 1700 1571 2670 1700 1427 2836 1700 1634 1700 2602 2918 1427 2144

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


ZGPCSHHSBDFQKLPDETSTCCCUCHEYCUAEHHMEZAPPOUUGLEEU

WE SHALL FIGHT ON THE BEACHES AND WE SHALL NEVER SURRENDER


16 20 11 44 39 38 75 59 28 46 29 13 77 33 11 69 24 20 48 18 63 44 28 86 11 38 42 65 71 75 41 28 21 29 68 11 33 44 28 46 11 65 33 87 27 25 15 69 77 29 38 28 58 11 69 22 64 28 42 29 57 39 65 33 69 61 43 11 75 59 28 58 29 64 71 42 39 21 63 61 37 87 44 88 65 10 20 71 46 59 20 63 86 11 21 69 38 44 28 46 75 11 57 42 59 28 18 16 39 75 20 87 38 29 42 59 11 27 75 20 28 67 33 59 69 13 64 88 57 11 21 61 63 77 28 42 20 11 46 87 48 65 28 33 10 59 71 21 20 39 68 22 11 64 75 59 28 65 11 58 63 27 87 42 71 29 44

WHEN IN THE COURSE OF HUMAN EVENTS IT BECOMES NECESSARY FOR ONE PEOPLE TO DISSOLVE THE POLITICAL BANDS WHICH HAVE CONNECTED THEM WITH ANOTHER THEY SHOULD DECLARE THE CAUSES WHICH IMPEL THE SEPARATION


LSEMCIEWTQNRNVKTRMCCRVYRIBWXILETIJMGHWIRGMLUSLERKWTJXQACTQBGZONESCOIDNTTSIGLXMYWPIIZFKGIXLTFTIHTPPPYPIBUCBZZVIMNXLHVYTPAJZHMVGDOMURNEKSFGFRCEHRVFZFYEBIITSIINDPMNEYIFLCTQ


KCTQIHSIQHRSKGAAYPQICAQDKQMCAXZGEYREKQIQEXQQIAOB

LA HISTORIA ES UN PROFETA CON LA MIRADA VUELTA HACIA ATRAS


CHARGEOFTHELIGHTBRIGADEINTOTHEVALLEYOFDEATHRODETHESIXHUNDREDBRAVECAVALIERS

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


OEIEPNTALTONAOOEOIULNWDPPCMSRNNLOPCIOEUYWOEESOLTTITBPNIXVECOREIXPOSIRAATENEANLSIUNNDTXRCRDCISXFL

OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE

Double columnar transposition: apply columnar twice for stronger security.


90 52 82 11 91 90 64 78 91 90 82 84 26 19 91 163


WHMND WSSUQ OUSHV WGPPE LAPOR UOZZB PNRZR TZWWS QQLZJ ARRNN QHAIO YANES UIWZV ZIDKJ REXDW QEFLX OWBKR LUXVR OYONZ UHUCM CTVPS OQXNG LVACF WEEMA LPKMY HKRVP XCODV IMXCW PSPMH UHGSX SWZXU QQATV CISCB BILEJ DRBPW IGQTN

ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE A TRANSPARENT TOOL SHOULD SHOW ITS REASONING THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS

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


GAAFADDAAAGAADDAAAAFDAADFDAADXFGFXFGGFFFVGDVGXVVXDVDFFGVADAGFFGFGFGAFAFGAGAGAGFFFFDAXVFDDVFXFVGDFVVGDFGFVGXVDXDXVVVVDDDVDGDXGXFDXGXDVDGFGVXVDAFGFFAFAFFFAFAFAADFAAAFAFGA

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


NJCKKZMMAWDJWUXYBAJWZRQWM


XDXGFAAADAAAAVAADAGAAGGAFVFXVVFDVF


EP V VCY BDK CLLSKV ZEXGKM LCPVKV EP ZSFK PEXACPVY RKCGDKM SP BDK OXKCBKMB MKCREXPK SPFCMSEP

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


01 12 12 20 08 01 20 07 12 09 20 20 05 18 19 09 19 14 15 20 07 15 12 04 15 06 20 05 14 08 01 22 05 25 15 21 08 05 01 18 04 20 08 01 20 20 15 12 04

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


IPKDFTSROOJORQYOFINSTAIPZAGJBJOWBHRKONCCAXMJUGAOFHMMEVATMFSHWFZQKBVV

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


76 25 59 62 33 65 38 80 34 36 64 59 79 32 26 65 59 67


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

THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY

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


DDIPYRIEXGIIHNUCANVCENFEVBRPEEHVGFLELYHTNAEXILNIPYETNRXEMTCTIEYGYXAAEKONNSITXNNDEGNSINHX

DIFFIE AND HELLMAN INVENTED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX CHANGING EVERYTHING


TBO ILQD LUQ ALD CS LKO ILQD FKD TBLU SBFIT ILVO TBO ILQD TBY ALD WCTB FII TBCKO BOFQT FKD WCTB FII TBY SLUI FKD WCTB FII TBY JCABT FKD TBOSO WLQDS WBCEB C ELJJFKD TBOO TBCS DFY SBFII RO CK TBCKO BOFQT

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


ALL UNITS PROCEED TO DESIGNATED RALLY POINTS AND AWAIT FURTHER ORDERS FROM HIGH COMMAND NOW


LKGYHVYBTMQDYVLKNPKDTPLARNJKLDRQDGYCRXYDULLREDXPKNKLEXHAKRED

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


JCXREFHTUDDXOSNVDT


KBXDTHBBTOMDMPLUUZHSZRBXMTZAPPNYMZMRWMLFLVVKCALEGAATDKMNNHMAVWX

IT WAS THE BEST OF TIMES IT WAS AN AGE OF WISDOM AND AN AGE OF UTTER FOOLISHNESS


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

DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY

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


PMORELLHPQOLARHHBQAULERBQTGUGAUTARTXQXCODHIIXZAZCRHDIAHKVEGPGXURXRCAXVHDDHE

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


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

OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG

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


YCXKEVXCFNJYCKOAMXOTVPETJATZUHONMTDRNFZIEGCKHGXQKISRKWPWROIEJMQFDGODKFIZND

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


VCUG SCJA NXZP MBVR JZSW NMDO NFCD RWXO KTYC WXBC UMWJ LTBL ZTUE RRMQ ZXOP TYQU ITBF FZZJ UOTB VHTM KTPF LXSC XMCV FDAO TDYQ YCBB WMIP URHD RXRN SJSH NDOZ ZCNA BLPQ ITFU JQBO IWGT UCVC

HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS KERCKHOFFS PRINCIPLE SAYS THE SYSTEM MUST BE SECURE EVEN IF ENEMY KNOWS ALGORITHM


QHIEQESDTGGWSCKUNSGHGRXKANNWIHVXESEZWQHEEYTESWTURRPFCZEUSUMJDPYWFMYMJEDEGGWTLP

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


LQNNQMIVLPMTTUIVQVDMVBMLXCJTQKSMGKZGXBWOZIXPGQVVQVMBMMVAMDMVBGAQFKPIVOQVOMDMZGBPQVO


THEQUICKBROWNFOXJUMPSOVERTHELAZYDOGNEARTHERIVER

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


YWGAMCEPCWUSANDDQS


24 36 77 56 26 57 66 45 38 77 45 26 67 77


ZPWD WQUK JTJX PYOD YPHB BPPH WPDV HDQE IZAR UWMR HUQD QKFB RBUY QZLO RYKE SOJR QHSY MKPT ITVR OLRY WHC

THE VIGENERE CIPHER USES A REPEATING KEYWORD THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS

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


RSRLLVWLIMCWWLXHJKG


PSMKS ETCDT ZAAKG OSAFE SRJWN BUSAI IAZLI QOESV AXLYA GIVDM KLXRJ DLDCS ZYMHY ZGFAV S

A STRONG CLAIM NEEDS STRONG EVIDENCE FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS


21233 21247 21247 21235 21248 21255 21239 21246 21245 21235 21248 21244 21240 21242 21249 21240 21249 21243 21239 21238 21244 21232 21235 21244 21257 21239 21243 21232 21249 21255 21246 21238 21235 21237 21244 21249 21248 21246 21259 21235 21237 21237 21249 21242 21238 21233 21248 21231 21244 21249 21244 21232 21235 21244 21247 21235 21258 21233 21247 21236 21259 21257 21232 21233 21237 21232 21257 21239 21237 21235 21248 21235 21244 21244 21232 21239 21243 21235 21247 21239 21244 21233 21247 21239 21257 21233 21246 21246 21244 21232 21235 21244 21233 21244 21243 21232 21249 21255 21246 21238 21236 21239 21237 21249 21247 21239 21235 21255 21248 21233 21256 21239 21242 21243 21235 21246 21246 21235 21257 21244 21232 21233 21243 21237 21235 21244 21239 21231 21249 21242 21233 21237 21235 21246 21233 21247 21240 21239 21242 21235 21244 21233 21256 21239 21238 21239 21230 21233 21248 21239 21243 21247 21249 21242 21235 21246 21238 21255 21244 21259

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


99999 90013 90004 90021 90004 90017 99998 99999 90008 90013 90019 90004 90017 90017 90020 90015 90019 99998 00061 99999 90004 90013 90004 90012 90024 99998 00032 99999 90007 90004 99998 00006 99999 90012 90000 90010 90008 90013 90006 99998 00005 99999 90012 90008 90018 90019 90000 90010 90004 99998

NEVER INTERRUPT YOUR ENEMY WHEN HE IS MAKING A MISTAKE


QPROQTCQJDWNOKHHSCQDJDCQHOSTCTHNJSQKJJSTKQJRQTJDCQJRJWKQPOTNJDNJSHSJDBPYSWH

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


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

DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS CAREFULLY

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


98 47 37 10 80 80 58 36 39 10 58 58 93


FREQU ENCYX NALYS ISCAX REVEX LWEAK CIPHE RSXDX

FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS

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


SABDY EIEEX CMTRX USESX RSSCX IHTRX TOEUX YUDTX CLUIX LDNNX

SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY


COLUZ NARTR ANSPX SITIO NREAD SCOLU MNSIN KEYOR DERTZ EPLAZ FAIRC IPHEX ENCRY PTSPA IRSOF LETTZ RSSIM ULTAN EOUSZ YDZCD

COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY


VODPQLFEJQWIKIGVBHIFJKBCBSOCGGCPASJWQOAUOFAHQ

THE REPORTS OF MY DEATH HAVE BEEN GREATLY EXAGGERATED


ZYZHYXLWAAUG


XNQBECXGKFAPXZM


I3 M4 D5 S8 E4 O3 G0 P0 O1 B4 C7 N2 I1 P5 S7 I3 X3 N7 L7 P8 Y6 P5 Z4 C0 E5 S0 R3 C6 Q3 O3 G5 D6 N8 V8 O0 M2 F7 P2 Q2 L5 O0 E9 C6 C7 S0 A2 M7 O7 K2 B4 N9 C0 P2 O3 A2 B6 K4 E8 O3 E6 X1 U2 E8 S0 C7 B4 M7 P0 X1 D8 L2 N3 U2 N5 S7 P7 E8 I3 M9

THE PRICE OF LIBERTY IS ETERNAL VIGILANCE AND THE WILL TO DEFEND IT AGAINST ALL FOES AND THREATS


XPLDFCPEHTNPNFEZYNP


44 23 15 12 24 21 24 14 13 24 35 23 15 42 13 34 32 12 24 33 15 43 11 35 34 31 54 12 24 45 43 43 41 45 11 42 15 52 24 44 23 44 42 11 33 43 35 34 43 24 44 24 34 33 44 23 15 34 33 15 44 24 32 15 35 11 14 24 43 44 23 15 34 42 15 44 24 13 11 31 31 54 45 33 12 42 15 11 25 11 12 31 15 24 21 45 43 15 14 13 34 42 42 15 13 44 31 54 14 34 33 34 44 13 34 33 21 45 43 15 34 12 21 45 43 13 11 44 24 34 33 52 24 44 23 15 33 13 42 54 35 44 24 34 33 35 11 44 44 15 42 33 52 34 42 14 43 23 15 31 35 12 42 15 11 25 32 34 33 34 11 31 35 23 11 12 15 44 24 13 43 45 12 43 44 24 44 45 44 24 34 33

THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION

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


MJN MNFNKARCJ MAREXTYMX


76 80 50 82 11 77 68 29 82 61 66 50 77 68 66 82 11 55 82 43 57 82 29 25 66 36 76 80 69 77 61 66 68 66 50 61 66 50 52 61

FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS


26199 26187 26184 26197 26184 26186 26188 26192 26184 26193 26199 26198 26187 26180 26191 26191 26180 26183 26101 26180 26193 26182 26184 26180 26199 26185 26188 26197 26198 26199 26191 26188 26186 26187 26199 26198 26100 26195 26195 26194 26197 26199 26184 26183 26181 26104 26180 26197 26199 26188 26191 26191 26184 26197 26104 26194 26193 26199 26187 26184 26184 26180 26198 26199 26184 26197 26193 26185 26191 26180 26193 26190 26199 26194 26183 26180 26104

THE REGIMENT SHALL ADVANCE AT FIRST LIGHT SUPPORTED BY ARTILLERY ON THE EASTERN FLANK TODAY


FUVMKMLUKLSEYE


HXYAPVDMASUCRKZTPMDDBKUPPJGPLNCHPQWAGTJBLMKJAUUTGUMGKSWCL

ELEMENTARY MY DEAR WATSON THE GAME IS AFOOT AND THE CRIMINAL IS CLOSE


09 08 01 22 05 14 15 20 25 05 20 02 05 07 21 14 63 06 09 07 08 20 19 01 09 04 10 15 08 14 16 01 21 12 10 15 14 05 19 01 19 60 02 15 14 08 15 13 13 05 18 09 03 08 01 18 04 20 15 15 11 08 05 01 22 25 06 09 18 05

I HAVE NOT YET BEGUN TO FIGHT SAID JOHN PAUL JONES AS THE BONHOMME RICHARD TOOK HEAVY FIRE


KAVCUMITCSLY


CAOETVRETREMRY


THE MANHATTAN PROJECT BROUGHT TOGETHER THE GREATEST SCIENTIFIC MINDS OF THE TWENTIETH CENTURY IN A RACE TO BUILD THE ATOMIC BOMB BEFORE NAZI GERMANY COULD DO SO THE EFFORT CHANGED THE WORLD FOREVER


UJPWOHLMJRQNCOBGVDCTQQVVNKERPKIZRPYPFLAWLCUCXMQYUYLAMIBHSYJTDRGWRSIXPYZUHHVHSIEQHGQWWJKVKFGNMHTGDCSAKGESGZFOLYRLOTSYXTYGNTZINTLQOIXZUIFFZKYBGQPGIIAGCHDPTCNBIPKYALNPKUTBXKQY

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


PPNB EQVO IKOE UPQX FYWK MPOB KTLU KSPJ GSXQ KMQG GWYW LLGJ ZBPM EOEU CUZP WWSD ZBHQ HFCX HWUI CSTF TIVJ WBMW MJFU SKYX WGYM AZGO HFTX WJYH ZNZP MGWC WBWR QJNA YLOE GOGF TJTJ CDUS MEQK LXLI OYSS IUED RFRZ WKOH DBBV

POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY THE VIGENERE CIPHER USES A REPEATING KEYWORD A MODEL CAN CLASSIFY PATTERNS BUT IT CAN ALSO BE WRONG


NGONFU RAPBQRF OL ERIREFVAT GUR NYCUNORG PELCGBTENCUL ERJNEQF CNGVRAPR NAQ PNERSHY GUVAXVAT

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


MVLPUCSBBOFNJFATJDJLNFFTVVDJDOLMVTTDXPDXPDJDTJLCDHTTDLMSJBCDHSFCSUJODCSVJLJKOBLCVNBJHTJCWQJCUPSG

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


20 18 21 19 20 64 60 12 15 18 04 23 09 20 08 01 12 12 20 08 09 14 05 08 05 01 18 20 61 12 05 01 14 14 15 20 21 14 20 15 20 08 09 14 05 15 23 14 21 14 04 05 18 19 20 01 14 04 09 14 07 64 01 12 12 23 01 25 19

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


15.26.1 8.14.14 10.15.4 5.36.12 8.27.4 13.23.11 9.43.14 18.10.2 14.3.3 11.33.7 6.36.12 12.49.4 6.48.4 17.19.13 14.25.5 3.22.13 18.20.11 16.43.1 14.1.3 5.16.3 12.38.6 12.6.9 10.10.6 12.3.10 14.50.13 7.39.12 3.32.3 19.17.1 18.43.6 16.35.15 7.21.10 10.3.6 17.35.11 6.34.12 7.41.3 5.2.13 9.31.14 2.5.9 6.37.5 6.34.3 15.42.3 5.10.5 20.35.8 1.35.7 18.10.3 20.18.10 19.8.10 6.34.8 18.26.13 13.5.7 4.8.6 15.8.3 19.30.6 5.24.9 15.12.8

TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS

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


90 26 56 34 33 91 90 79 28 82 33 91 90 26 28 37 33 91


KYQZCX KL GYRL JCIXM QGL ZQVIOQIVL CJ MXY YXM UQ UZ Y MCIPEL GLEUN CJ PVLYQGQYWUXH PLYIQA

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


MPRETCTEBTAIADCKCDHEAOHHROTODIKFEIRPTEIAAORBLSOIOSNEREOERNNENETLCNTLLREEYHECYOUIQBINESYUGSCAITEUICTFNOIPLREMELNNCOENADEPHMRBULYSREEEHARMCTTRYBTYAOTARPTEEX

MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY

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


AWQEKNWJMJWAELRKSPW


NSSV JZGK UBHD XZFQ SJOV QMWM YEKS EONS WXBX PSKG LLEY QSHU CCRH EPDP ZKSD ZYBK HKE

DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX


PCBUBOSRNLDDOEOUDDIDBNLOPCPCEUCBQRTHIMQSHLENCPDEFLBDDSPRAEMTQQUDQREPLDWIQLKIOQGY

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


63 1 91 25 33 3 81 78 45 34 64 11 17 33 96 63 67 58 48 2 80 40 45 99 72 2 39 63 17 2 67 33 25 66 87 11 14 67 11 25 66 25 14 60 49 26 15 72 67 11 33 3 79 2 67 96 22 22 79 66 64 33 70 87 22 87 72 40 48 50 67 22 46 45 34 33 87 72 70 46 66 62 48 15 21 48

PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE

Homophonic substitution: each letter maps to multiple possible numbers.


ARITH LOTHI AKHEN NECBE TEROX UNIMX RIBBX IGSEX NMAMX GANAX BWDCX

ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE

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


ATBA SHEN CODE SBXR EVER SING XHEA LPHA BEZT HEDE TECT IVES TXDI ESPA TTER NSBE XORE MAKI NGCL AIMZ COLU MNAR TRAN SPOS ITIO NREA DSCO LUMN SIZK EYOR DERS LOWL YZ

ATBASH ENCODES BY REVERSING THE ALPHABET THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER SLOWLY


GRCB HLSZ RHUG FWLU STFB NBKV QPAD YFQP YPWT KJFM DKOQ KECN COFB CDQI AUVI ZQCH LWAM OXWD LCSW TCWF NURH KLVR RRCR NRGX OMTM MZDB FHKA DCGK MMBU

THE INDEX OF COINCIDENCE IS A USEFUL CLUE OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION


173 177 155 179 143 153 128 114 167 181 169 174 115 177 173 160 177 100 174 157 175 124 100 166 119 112 152 119 173 177 149 168 136 122 130 134 114 180 166 179 161 177 173 170 149 157 173 113 114 164 133 168 161 157 146 150 127 128 168 100 180 117

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


VPEXAAQUEUJOZGECPUUCIDIVJEKVHRFRCOQVIRPFTYOQRWEBWCBBTTRGNXHPCDIVBECC

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


GVWNOHYYUVIHFNGQADJMDRUAZSKVYUSWXHMPNSHKGBRUUZSPSMKQFYWVASDNSXVANFOHF

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


LLGVRBYQCDEVZMPVYLWHTFXHJWUFGKWEVVEHGQRCIQHSNPEEHLCSIMAGULFLLMVLXBGR

THE ENIGMA MACHINE USED ROTORS TO CREATE A COMPLEX POLYALPHABETIC SUBSTITUTION


TPSLCBTJRIFVYTFADROTKNDYYTRWQYIUWCVMEEYEAJMDTFNOXRMEQLCZJSLOUBYCJUUFTMBBKLHYKRWXPQGFLDYTGOIFRHQXUWVQHHPHRMZYVINYMSKBTIZVBFBLODIPATGSEKRRBBAPPLN

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


118 181 136 156 156 101 130 142 139 111 181 170 121 181 121 141 118 128 168 101 140 119 114 118 181 136 156 111 181 101 104 104 101 140 178 156 141 126 154 152 164 167 171 137 141 103 109 178 150 138 154 142

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


AQRKYQOLFFLAECYLCOBNYNEITYQFEQPLOOYCCELUTGXHCFIRSSKUKHUMQTXUSIXKFTMHTDAKZFBABAXVS

THOSE WHO CANNOT REMEMBER THE PAST ARE CONDEMNED TO REPEAT IT AS PHILOSOPHER SANTAYANA OBSERVED


RXU KNWDWFGCFQNU SXKQTV YEOG SQSKGG XYTBUT LRG QLG LQYA JKB QS LRGQHGLQIENZG EXDHGEOKDNG WT QMUH CKTNUILNM

THE ARCHITECTURE SHOULD MAKE MISUSE HARDER THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY

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


AFROHAVIBCEUTFNYGBQLPVONRIHLLCLZBCSTLYFZNDGNEUINBHNOYOFAAFRCCA

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


AMNNGBMERCYSPOYYYEWOVGJLICOTRKXCNBWXEVHLMQUSQBMVAEDLWDEZDMRUFROPJMLJDAXXHLQXVXOURKLRHGLDFXALTLPQNWUDLQKNYRWVQWEFQMIGLYUFOMNSGUSFQQVFNYUHHPCUTYHWGDNENCHLPDHKEUEJS

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


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


MDSV UNET XKDT ZXLH VGJN PMLH ZTJB TMGN MFHD EBVQ WYJU MLHP SLTF GMAV WLKI QOGD PIFG IVQK TXWC EKQV SLRT EP

TWO SQUARE CIPHER ENCRYPTS DIGRAPHS WITH TWO POLYBIUS ALPHABETS A STRONG CLAIM NEEDS STRONG EVIDENCE

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


TQEINFOEUTXSFISIIUCISCSETINATTEESGN

TOUT CE QUI EST EXCESSIF EST INSIGNIFIANT


WESFTEALXTNHETSEHEOVAAEXXDRTIBTOLREDAEEXXQCLESUDTTENLRUXXAEMTLHH

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


EUBBLBOIPTPVEM


OKEDY CHOLY PCHOL QOTED YOXED CHEDY CHOLD AIINY KCHEO LOTED YRCHE OLYPC HOLDA INYOK AINOK EEDYD AIINO KEDY

ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE

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


BBIPIUARUTJBMGMBFXHRDAQGXUYPOYWKFVWUCYNMIJERMWORPQSKKEDLLQFMXBLPBINCWJBLNQRAG

THE RIGHT OF THE PEOPLE TO KEEP AND BEAR ARMS SHALL NOT BE INFRINGED BY THE FEDERAL GOVERNMENT


RL KLS EL EAKSIA DKSL SBCS ELLR KDEBS LIR CEA QBLTIR OTPK CKR PCVA CS UILQA LG RCY PCEA PCEA

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


KLGRMALABNMAEZJJSPAWJVEBZXYVQCALOMLLGAK

IT WAS THE BEST OF TIMES IT WAS THE WORST OF TIMES


BOTCCVEDYTSPDRIAIHREATEPLGEETELSCAEORRIUFSEOFNNRIF

BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF


66 36 82 20 82 61 66 57 82 61 61 69 29 61 61 36 69 89 89 36 82 80 82 66 36 82 77 82 66 36 69 11 76 68 50 57 61 66 36 82 55 68 61 50 61 55 50 82 73 68 77 50 29 68 66 50 69 29 76 50 29 11 61 80 82 65 82 68 66 82 11 66 80 50 25 80 68 77 61 50 29 52 50 65 36 82 80 66 82 73 66 80 69 59 66 82 52 50 65 36 82 80 61 80 82 68 11 68 25 80 50 11 50 29 68 65 80 82 61 52 80 50 20 82 11 25 82 69 77 82 66 80 50 52 65 68 66 66 82 80 29 68 61 52 43 66 68 57 82 50 61 68 80 69 11 59 61 82 11 20 43 61 65 68 80 66 68 29 61 66 69 82 29 52 80 43 65 66 77 82 61 61 68 25 82 61

THE BEST LESSONS SHOW WHERE THE METHOD FAILS THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN A SCYTALE IS A ROD USED BY SPARTANS TO ENCRYPT MESSAGES


T4 R0 V3 L0 J3 F9 J8 J4 U8 R0 E6 T2 V6 P5 O2 A5 V3 G4


2.33.12 1.29.15 2.17.1 6.3.8 3.39.12 2.40.14 20.31.10 12.28.15 3.5.4 11.3.3 18.21.6 6.25.11 17.7.15 10.15.11 17.44.6 20.46.7 10.6.15 9.13.9 18.24.2 1.34.3 15.34.11 19.9.5 12.39.6 3.7.8 15.39.12 3.40.7 18.26.12 8.11.12 15.42.13 1.17.8 16.12.6 16.12.15 6.28.1 10.6.11 9.41.13 14.34.7 14.3.2 12.24.4 8.4.11 19.36.1 7.46.1 9.14.3 18.12.14 9.36.5 16.7.9 20.26.11 1.7.14 4.46.1 16.39.13 15.38.12 5.1.5 6.22.4 16.15.9 20.29.2 11.16.13 15.42.5 18.46.14 20.33.3 6.30.8 14.32.6 14.1.7 17.29.5 11.13.1 8.18.11 20.42.11 7.20.14 16.47.2 17.38.4 15.4.1 3.7.6 11.31.5 4.39.6 6.22.1 14.29.12 13.34.2 4.17.4 13.7.8 6.49.11 17.37.2 6.30.1 14.26.13 5.16.10 9.14.3 15.47.7 9.3.6 7.31.12 20.18.13 6.23.13 10.9.10 19.14.11 7.17.3 14.29.2 15.15.6 8.30.15 19.14.7 14.39.8 5.28.9 18.16.9 4.48.4 3.38.12 10.48.12 12.4.4 4.17.9 18.32.15 3.2.3 9.11.2 14.15.15 19.10.11 4.44.8 10.6.9 17.5.1 7.17.13 1.7.9 1.12.5 14.41.11 1.46.10 8.28.10 5.24.7 1.28.13 14.28.1 1.9.10 10.15.12 2.34.7 18.28.13 8.6.4 2.9.12 12.32.11 15.8.15 16.16.12 18.22.10 4.21.7 2.16.9 6.20.3 7.43.7 12.48.6 5.50.4 15.29.11 2.33.12 8.3.11 7.7.1 8.8.8 1.13.15 18.19.13

CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER


OXWAVVPYOJKWKKMGLDFAEPBJTKBGDPDCWBKWFMDVXMQXYQTSNAKWCKXSMIJAJIZWXTNNNITSRPRMKYBUTZ

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


HTCIORINITEDZVLWNDDENKHFIPIYRHGGKOGXSTESRKPYDMLOTTFAITHRAIAH+LVPUHUKFGLAOHVREAJCLCG

DIFFIE AND HELLMAN INVENTED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX CHANGING EVERYTHING


NANSS VARPV CUREN CCYVR FNYVA RNESH APGVB AGBRN PUYRG GRECH OYVPV ASENF GEHPG HERQR FREIR FPNER SHYQR FVTAG URXNF VFXVR KNZVA NGVBA SVAQF ERCRN GRQGE VTENZ FVAPV CUREG RKGGB ZBEEB J

AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT TOMORROW


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


FKYMLHYSMRANNMKCHBDMUOKCFJEHMRWWDISJKEIJEBDMQRUBKPOQGTKQNDCZANBIMRWWHY

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


9.47.9 15.31.11 8.36.9 10.36.14 4.11.15 4.38.11 6.30.14 7.13.5 11.43.14 11.39.6 20.29.1 17.34.6 1.7.14 13.38.3 7.15.2 18.22.6 8.33.4 17.23.10 13.1.9 8.44.9 5.3.11 17.27.5 16.14.11 9.3.1 14.46.7 14.49.4 9.11.11 4.30.6 3.29.10 1.19.9 2.32.2 18.25.8 6.24.13 6.34.9 17.34.3 1.21.4 18.7.11 4.32.1 14.26.4 12.7.7 6.32.9 19.26.15 4.46.14 9.6.14 19.39.3 6.19.15 16.32.14 12.9.7 20.30.7 16.28.1 5.3.4 11.2.14 7.30.13 20.18.13 7.16.13 18.3.11 14.42.2 5.30.11 19.36.13 17.31.11 3.16.13 7.3.9 11.16.10 9.35.7 10.24.8 5.11.3 20.40.5 2.28.2 15.42.15 17.23.11 17.3.15 12.38.15 13.40.8 1.7.5 13.25.3 6.41.9 1.37.7 6.23.10 18.20.1 19.20.14 17.9.9 7.25.4 2.2.4 17.18.8 19.8.14 7.40.10 6.12.4 19.39.3 19.6.3 1.11.13 17.49.9 16.17.12 18.40.7 3.6.4 14.31.12 7.15.9 2.27.6 20.34.1 5.42.4 16.45.1 6.16.10 15.16.14 12.7.5 16.34.9 9.46.5 7.23.5 3.22.3 4.37.15 9.49.10 16.39.14 2.27.1 8.11.3 5.21.10 14.47.3 1.28.15 15.44.4 2.48.15 20.7.8 4.48.13 15.28.2 10.16.15 3.34.10 4.31.1 8.12.2 13.35.10 18.2.4 7.11.2 7.11.5 9.23.7 4.17.2 20.1.15 13.15.12 10.43.9 15.28.1 4.1.14 1.16.14 13.16.10 2.11.6 17.4.2 6.4.11 4.36.3 11.1.15 6.5.10 15.5.2 6.27.13 2.10.11 11.33.2 10.10.12 17.33.7 6.12.2 17.35.3 5.8.6 7.24.2 12.46.13 14.16.11 3.17.1 17.48.11 13.38.1 1.12.13 7.43.3 12.35.6 5.25.4 8.24.5 4.26.15 12.50.2 20.11.11 12.26.3 7.14.3 10.39.5 9.40.3 6.43.11 17.23.6 19.21.2 11.34.9 1.31.12 2.13.15 1.37.14 10.7.9 8.1.13 1.36.7 17.42.8 10.45.13 19.6.1 7.24.5 16.11.4 6.43.15 7.37.4

THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN THE ARCHITECTURE SHOULD MAKE MISUSE HARDER THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS


T4 R0 V3 A5 U1 K6 J6 G2 U8 G0 E6 W5 X4 O4 H0 U2 K2 A2 K8 R9


STNOARRNPEEISONK


5645 4871 5563 5397 4154 4680 4998 5563 4427 4871 4871 4680 4550 4427 4998 4298 4427 4489 5397 5060 4934 4216 4871 4427 5563 4298 4614 4871 4427 5963 5166 4154 5397 4809 4550 4154 5741 4427 5563 4614 4427 4154 4871 4871 4680 4427 5488 4154 4998 4427 4998 5060 5397 4934 5060 5645 5488 4154 4361 5741 4154 4998 5563 4154 4550 4427 4680 4998 5814 5060 5397 4871 4361 5814 4154 5397 5563 5814 5060 4216 5963 5397 4427 5741 4427 4154 4871 4680 4998 4550 4550 4427 5397 4934 4154 4998 4680 4998 5563 4427 4998 5563 4680 5060 4998 5488 4216 4427 4489 5060 5397 4427 5060 5166 4427 5397 4154 5563 4680 5060 4998 5488 4216 4427 4550 4154 4998 4216 5645 5563 5563 4614 4427 5488 5060 5645 5397 4298 4427 4614 4154 4361 5563 5060 4216 4427 5166 5397 5060 5563 4427 4298 5563 4427 4361 4154 5563 4154 4871 4871 4298 5060 5488 5563 5488

ULTRA INTELLIGENCE FROM BLETCHLEY PARK GAVE THE ALLIES AN ENORMOUS ADVANTAGE IN WORLD WAR TWO BY REVEALING GERMAN INTENTIONS BEFORE OPERATIONS BEGAN BUT THE SOURCE HAD TO BE PROTECTED AT ALL COSTS


LUMTWDULFWIPVVXWPFFMHSIEJGJGBYHEXPYKFKSJDUXBXNSINFLOMOLEFJPWHVWUMDUJSTPULFXHISOTUFHEJDEAFYDLIJSFSIBXHEHFARUMPSWPXIFWDEVXHGSSBKJGIYKFCHFYFXIJOBWUKXMPNJDTYSJ

IT IS RATHER FOR US TO BE HERE DEDICATED TO THE GREAT TASK REMAINING BEFORE US THAT FROM THESE HONORED DEAD WE TAKE INCREASED DEVOTION TO THAT CAUSE FOR WHICH THEY GAVE THE LAST FULL MEASURE


TEUTSSRWDVWTBCWXIBYWQYUMZYIEHEBLIQJUPKKSXOFLMGHVSVOHZRURDSOTACBDCZGPLNWPJTVVE

ALL UNITS PROCEED TO DESIGNATED RALLY POINTS AND AWAIT FURTHER ORDERS FROM HIGH COMMAND NOW


EAGSCJHLQAIYZIVGKITTDBHZXXLYDNRQDPFUOXLPZVOQQPPKDAKXWGTWRQDPQXZDFPMO

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


DWLUKMCXLCLLGSNHTPOMJ


SBAGNNRMVOKUMLWRCDWEAANEKKYPCEOWITGRMYDCCORLRUVCNNEDDGIBHLETZHRFZN

STAND FIRM AND DO NOT LET YOURSELVES BE BURDENED AGAIN BY A YOKE OF SLAVERY TO SIN


SUFNKURZEQEITSUHLEERKKCQHTMHAFRQDLBBEKIXEQEITSSUFNKUGCQULELUPUENDFOHTOGCKPUNCK

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


TIGSP FEMIR BNUCV THVFV LTLQQ OAJTV SKRLB COCEF WBKCL THZKR QKYBN DRYAY QWQMD BYTUE AZGVS FRGCS KEWFT KBQOM AZPTC RUACI APSAS UKWYY OVVLS ATRFH CRHXU XDICS TFTWS FJPNO OCQAH AUKLX L

THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER

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


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


HGPTCEEFNNDITYPQGVECRTHGDWJTREPDZUYGPSFKBSCEFYATXPADXMATFVYFBXXGJRBSWUQEPDEFUJ

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


108 178 141 170 174 147 165 175 172 166 123 163 123 102 138 174 147 152 117 137 143 100 167 133 106 128 108 178 156 135 178 108 177 179 107 122 100 133 143 129 171 166 127 140 152 163 130 167 176 161 146 166 123 103 154 116 166 108 177 158 149 116 108 146 167 119 137 133 142 144 172 123 127 150 170 178 108 165 175 172 160 141 152 123 103 154 116 108 177 129 108 178 163 142 173 172 166 162 110 171 173 112 160 172 120 172 172 131 170 126 109 172 143 154 177 172 154 135 152 178

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


OOGCRQSJBQXZMRLLQQEBXVMOHQCYLFNFJLQGRBOBIABXWTHKANKHWVJTMDATMEOYLFMHDUNTTFSPPAJMVWFDBZMDFCXZJKKTFWEUEGMEAHFWZBDHEAEDLDUJNTPZDHXFOSN

THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER


14 41 22 44 43 32 73 41 88 57 82 69 21 65 24 51 34 14 43 22 35 32 82 25 69


108 178 107 171 173 167 175 160 111 166 178 131 182 102 165 174 147 152 167 128 167 150 145 172 106 103 131 167 108 100 111 172 151 143 150 173 160 172 128 174 172 166 162 175 152 169 138 172 158 161 131 166 170 178 175 160 166 138 136 119 138 108

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


GDRRHROPYHBEFGDRFPFGROIRFAVHPBKJQAXDRJUQQBJIAHVLPEAGDVJRUGQUJR

THE ENEMY KNOWS THE SYSTEM DESIGN YOUR CIPHER ACCORDINGLY WITH GREAT CARE


6346 2577 01632 1346 01572 6329 1580 01034 06319 02900 6984 1661 5984 06367 6622 1308 2862 1639 5985 05050 0373 6282 6311 01623 5722 04475 06009 00725 01617 01924 04765 05676 1581 4117 00398 03527 02868 04451 2210 1010 03782 0349 2916 4094 5979

THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS

Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher.


YCZZLOACFXSWVQRXIVYPIG


XATKSARRSOGWFWLTDOU


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


YNJKI QFWKO BJQFB KIZKG CKWVB RYNTQ OBFBJ OBJXO

FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS


6 12 5 5 20 1 19 19 5 13 2 12 5 19 1 20 8 1 18 2 15 18


NOVUSORMDUORSOELC


XMNLQXLVJBYFIBBRXPLBJWWKPCJLJIWJQNFTWGJYWBFLXVLFHWYPFWSLZGYCEDEPFYLUAZETHPTVKNOTLNERKTPFUULGFTLPYVFUCFKNHIXJUBCAGKLOQOZEBSIAXJUYZMXZYMUQYMXXAYDWNHNQLSFKPCCAJFFJSALB


PJQQ TV HLETJVQ LZTV DVJIL JBZ WVUVI THWS EZX QZWB CIVPHLVQD H OEZRBEO H XZRQS LJHQ JMZRO JWS LVV OEV ZPVJW

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


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

PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH PERHAPS

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


154 126 120 179 147 175 101 173 167 109 163 174 124 161 147 160 152 119 110 119 139 135 114 105 114 112 140 155 163 117 161 115 119 149 174 163 125 114 155 179 114

BREVITY IS THE SOUL OF WIT AND TEDIOUSNESS THE OUTWARD FLOURISHES


4 9 7 18 1 16 8 1 14 4 20 18 9 7 18 1 16 8 6 18 5 17 21 5 14 3 9 5 19 5 24 16 15 19 5 19 9 13 16 12 5 3 9 16 8 5 18 19

DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS


GAFAFGGAXXAADADFXAGXXDFFAAFA


ANNKCDBXMYUEDWGOVNLIN


MMHJRNVAKQUVVZFUMZ


SRGUDQ FRUWDU WRGDV ODV IORUHV SHUR QR SRGUDQ GHWHQHU OD SULPDYHUD

PODRAN CORTAR TODAS LAS FLORES PERO NO PODRAN DETENER LA PRIMAVERA


100 998 819 807 808 813 999 998 817 804 803 999 998 811 808 813 804 999 998 818 819 814 814 803 999 998 805 808 817 812 999 116 998 801 800 811 800 802 811 800 821 800 999 111 100 998 817 820 818 818 808 800 813 999 998 802 800 821 800 811 817 824 999 998 802 807 800 817 806 804 803 999 998 800 802 817 814 818 818 999 100 998 815 811 800 808 813 999

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


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


5488 5060 4998 5488 5060 4489 4871 4680 4216 4427 5397 5563 5963 4154 5488 5488 4427 4934 4216 4871 4427


EDLILEOPLSQUGAPUQCELFUHRPEBSRGEHEAVEOUPPKIONDSMHGARGBSRGDACPRGORPTTSRGFUTQ

GALILEO POINTED HIS TELESCOPE AT THE HEAVENS AND CONFIRMED THAT THE EARTH ORBITS THE SUN


6299 2609 01617 0693 1640 06036 6352 3831 1576 6010 06064 4744 04447 5983 05987 02528 04803 07303 07242 02562 1623 5688 01584 6374 02565 1640 4084 1666 6352 02529 4740 1335 01916 00388 2860 3814 06020 06355 02579 1640 06299 5732 02886 6314 2524 1660 04113 2877 6679 06016 0949 02834 05073 02596 1570 5684 0387 1325 06980 00330 4445 01028 01593 06046 06336 2532 1572 0329 03769 05067 02540 0365 0659 01591 06341 00659 7884 04805 4488 1605 5091 04789 6053 02924 06311 2912 04770 4461 1583 0352 01021 02547 03799 01600 6346 06363 01646 5724

THE BEST LESSONS SHOW WHERE THE METHOD FAILS THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER


ALMNCESNFEUDLIHNUDUDEHEGBRNLEESHNIDRINGECAWRENRCTNEOE

ALLE MENSCHEN SIND FREI UND GLEICH AN WURDE UND RECHTEN GEBOREN


AEBNNPAPOOAC


LOKPJZFXSAVU


01 12 12 60 23 15 18 12 04 19 01 19 20 01 07 05 61 01 12 12 60 13 05 14 61 23 15 13 05 14 13 05 18 05 12 25 16 12 01 25 05 18 19

ALL THE WORLDS A STAGE AND ALL THE MEN AND WOMEN MERELY PLAYERS


KURIT JOLQG ZGQLV INALI BAJVP NVNVM LINKK LIFPR RFMLD MCROO XMKSO YOFXN APQES QDZXU KYKMN PJJJL RGADA GOOCD YEKYH YQYOT YHMCH XBRFD UJFJO EKFOG KVCVW KXPSQ EEHEU YSQA

OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS


NHAECATEMTTRDITNLEICSNRUIAHCAAACRNNTSRRSLEEGAAAEEEITUMNHTLSSTAFDCRGWIGOISINRETA

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


WCQ OVCQR BXOQ C ZBFDO MK PYASP XZBGABPABQP WCQ MO POQD AQDB GABWORPVEO

CAN GRAND OPEN A ROUTE BY WHICH PROVISIONS CAN BE SENT INTO VICKSBURG


06358 02544 1617 1655 04465 02897 2249 04088 0317 04127 00403 00942 02602 02853 4470 01657 06670 6028 1646 01307 5693 4742 06340 04782 5707 5972 6379 4794 1014 5688 1612 0376 6298 01593 0389 5046 4782 3788 07862 0344 03823 5060 02581 00326 00643 01636 6312 2876 0955 01014 02878 5097 02594 1616 05681 4158 4794 01334 1618 5724 4449 01617 4474 0948 5711 7899 05116 06282 02847 04804 4435 2910 06006 4459 4762 06344 0667 05710 04751 03535 1667 4432 0658 7903 03838 01587 06299 06379 01646 05717 1905 05690 1585 5427 6665 01641 04479 0966 07898 01266 4739 06636 00719 3790 01616 6328 5662 0404 4487 06006 5060 04717 06057 2894 6361 2844 04724 04421 00326 5062 05082 3817 02874 1607 6033 01041 4710 3778 6610 4142 4447 0399 05745 01607 04421 01037 05657 07899 5095 06321 02862 4809 04415 6369 7256 2880 0967 01610 5061 04715 3792 7869 0384 03831 5069 02540 00397 0650 01668 6283 02848 00967 00949 02877 5030 02561 01599 05720 05983 06636 5995 1590 4155 06689 3848 06343 2915 05047 3833 1579 0378 03835 05062 02519 0374 00638 01611 6319 05996 2584 02885 1936 06341 05970

THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS


858 821 814 999 825 839 810 812 871 999 844 816 999 806 844 824 841 807 826 809 812 840 807 813 999 825 854 999 801 999 862 856 813 816 861 833 999 807 835 862 812 999

THE INDEX OF COINCIDENCE IS A USEFUL CLUE

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


BMPXHYLFFGLCKNEBGYYVOVQRTSGZPIJLYKIPQVPIPEPYGFVTEYIDGQRTMLOTUBGRIWCYEGGPOWNTAKZDC

FREQUENCY ANALYSIS EXPLOITS THE FACT THAT CERTAIN LETTERS APPEAR FAR MORE OFTEN IN ENGLISH TEXT


DHPRPSAMAODPDUFX


BYYPQDGRDCLCQVPBTW


HVOKEHNPYRJDBKYNUBUCEOXIZKCXRUXXGSRLZFWZXJZGTGPNBEXGUTJKFKZFQSBHVYNOHVLDJPIFLCVKAGXMACHAFLHUCLSBDYDVANOZXKTCJBSLQBAKZQVOBFAPQNHWGFSJNATQCWNRRTNOKABTZGL

TIMES ARE BAD CHILDREN NO LONGER OBEY THEIR PARENTS AND EVERYONE IS WRITING A BOOK IT SEEMS TO ME THAT THE YOUNG HAVE ALWAYS AND WILL ALWAYS BE AN UNRULY GENERATION FULL OF FOOLISHNESS


MOASI   /   A-KHA   /   DIBEH-YAZZIE   /   NO-DA-IH   /   NA-AS-TSO-SI   /   TSAH   /   WOL-LA-CHEE   /   GAH   /   THAN-ZIE   /   GAH   /   WOL-LA-CHEE   /   TSAH   /   DIBEH   /   CLA-GI-AIH   /   A-KHA   /   DIBEH   /   TKIN   /   THAN-ZIE   /   TKIN   /   A-KHA   /   TSAH   /   GAH   /   DZEH   /   WOL-LA-CHEE   /   BE   /   DIBEH   /   MOASI   /   A-KHA   /   DIBEH-YAZZIE   /   NO-DA-IH   /   NA-AS-TSO-SI   /   TSAH   /   DIBEH   /   TKIN   /   TSAH   /   KLIZZIE   /   DZEH   /   TSAH-AS-ZIH   /   A-KHA   /   GAH

COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX

Navajo Code Talker cipher: Navajo words represent English letters.


AFAAADXGXXGAADDGGFXGGDXGXAAGADFXGAFG


shaiin ykcheol sharal okal okal otaiin qokeedy oxed okedy chedy dainy dal otol ytaiin otedy qotedy chol choldaiin chol otain sheedy qokeedy chedal okal okal okedy oror ctaiin lkaiin qotedy raiin lkaiin kaiiin

THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION CLASSICAL CIPHERS TEACH WHY MODERN SECURITY MATTERS


44 37 57 63 26 67 75 37 59 77 23 64 57 63 24 36 68 22 58 46 64 38 27 77 56 45 76 75 54 65 77 22 35 37 75 27 48 67 53 36 36 46 25 37 86 56 45 66 64 38 25 58 54 55 68 83 45 26 96 34 58 36 77 34 37 87 56 56 58 66 45 57 86 54 47 38 57 24 27 60 43

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


EIACSOESMTSIAOETLTADOOUIIBETTDEHLHPNNHRNLTEFTTNPEEEHCSNRHGDEETVIAHATSERAOH


TSILMLARUVIDIHOSRVEEEENYSNFAOTIERBNESNERTEETVHNOTNDOTRETSTUARSGACHRRAETWYHOTSIHSCWSTMSORLEATTNKIREPHYOCAEIIEMARMLDWOHOCLRIARANRNJLDDOTCYIEANGCOLAREEDSADBLETCTEWLILCWEMOBOH

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


QFTHBKQLOYSDRUCELYTYLKAMZQZIRBGZXYDJZAYAXQRBCS

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


VMYUSCCTOVENVOFGTYHYMYVIVMYUSCCTOVENVOFGFTCYEFNRPGLEUMRFTVMYNSCCNOVEYVOFCYNSFTMROFNROMYVOYYLMYUMCCTVVENSOFNONVYVUMCCTVMYYFCCMLYQYLLPLYRF

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


NDGTOQCTEIRORXMLCHXYXVGGPRZNOOQXRREOBSFFQIXZHLFQIPJUUBGRYCZLSCOSIOFH

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


ASDRNLIUTPRTREAIFNHEHSAORLOIEWCASEUERWEEUEMNTEDASFAADTIESUFMDOLSDL

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


HPWEIRFABOCNWECTHVBKQAQEHGEMPOHESMCIRWEUWHRSQEWLVHQVEPQAMKRS

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


68 46 57 54 48 67 75 65 55 77 42 47 57 53 25 57 88 44 58 48 73 54 57 97 54 55 57 53 36 26 56 65 24 68 53 25 57 96 43 48 67 75 65 55 77 42 47 57 84 26 25 67 54 27 36 44 45 65 77 34 54 38 74 47 25 67 43 48 67 75 65 55 77 42 47 57 45 24 59 77 52 46

ZERO KNOWLEDGE PROOFS ALLOW ONE PARTY TO PROVE KNOWLEDGE WITHOUT REVEALING THE KNOWLEDGE ITSELF


QNTMTKJMQPJSGYATWQNNWUTHTTIOMTWQFYTXWOOTMWQTA

THE REPORTS OF MY DEATH HAVE BEEN GREATLY EXAGGERATED


16.4.10 8.2.8 17.6.10 5.1.7 4.6.8 6.6.9 1.3.4 16.2.3 11.6.8 1.3.1 2.3.7 13.1.9 10.4.6 3.6.7 4.3.2 6.6.8 12.2.6 2.4.6 11.1.10 11.6.3 1.2.1 15.6.5 7.4.1 13.5.3 16.1.1 20.2.8 9.1.10 2.5.8 14.2.10 4.2.3 11.5.6 4.4.7 5.3.8 12.5.7 9.6.9 2.5.10 5.3.4 12.5.8 18.5.5 15.2.4 19.5.10 5.5.5 19.2.5 6.4.9 15.4.4 18.2.8 5.5.8 15.5.10 16.5.9 19.6.10 18.6.8 16.2.2 6.2.2 18.2.1 17.4.9 16.6.3 10.4.5 13.2.9 18.1.6 8.2.5 12.3.1 10.4.10 6.4.6 13.6.1 5.5.6 12.2.4 14.1.4 2.6.9 8.2.3 14.2.8 16.1.9 3.2.4 4.3.5 2.4.10 15.1.6 1.1.5 8.4.7 19.5.2 8.2.2 12.3.7 2.6.3 7.4.10 12.6.2 5.4.8 16.1.3 10.3.6 1.2.8 19.2.2 4.5.7 9.6.6 20.1.4 7.3.5 11.4.4 3.3.1 20.5.3 18.5.7 19.1.6 14.6.10 11.4.6 18.4.7 5.4.6 1.3.9 1.6.9 19.3.10 20.4.8 14.1.2 2.6.6 15.3.9 20.5.5 18.6.4 5.1.8 18.2.3 4.1.8 19.6.9 13.1.5 11.5.5 14.2.5 6.5.9 20.3.3 2.1.8 7.3.7 8.6.7 9.4.2 16.3.5 4.1.2 8.2.1 19.6.9 2.1.9 11.3.10 7.6.5 7.1.4 4.6.7 14.5.6 2.3.3 12.1.3 5.1.1 14.3.1 11.1.4 8.6.1 14.6.7 2.3.4 13.6.2 1.3.7 4.5.4 7.4.5 15.4.6 14.3.1 7.4.7 9.1.4 8.4.10 10.5.3 2.6.10 5.6.9 8.1.7 19.4.1 14.3.6 7.6.3 10.1.2 8.6.10 2.1.8 8.4.2 8.4.8 8.5.4 20.1.7 15.1.6 4.4.9 2.5.1 5.6.10 1.5.6 11.1.8 16.4.3 13.2.4 4.3.9 8.1.1 7.4.3 11.3.5 7.4.2 4.3.6 1.3.10 9.4.6 13.4.2 1.4.10 8.3.7 12.2.8

COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER OPEN SOURCE TOOLS ALLOW INDEPENDENT VERIFICATION DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER

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


INTHEBEGINNINGWASTHEWORDANDTHEWORDWASWITFGODANDFULLOFGRACE

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


TJUQVBFNMZNA


THEPX AYFAI RCIPH ERENX RYPTS PAIRS OFLEZ TERSS IMULX ANEOU SLYTZ EARCH ITECT URESH OULDZ AKEMI SUSEX ARDEZ SUBST ITUTI ONCIP HERSM APEAC HLETT ERTOA DIFFZ RENTZ ETTEZ

THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY THE ARCHITECTURE SHOULD MAKE MISUSE HARDER SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER


FLANK RAIDS INPUT ENTER DEPTH MOVED AFTER NOTES EIGHT SWIFT TROOP INCUR MARCH AGAIN TAKES EIGHT DELAY KNIFE EXTRA YEARS LINES EARLY NAVAL GUARD THREE

FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS THE BIFID CIPHER COMBINES A POLYBIUS SQUARE WITH TRANSPOSITION

Null/steganographic cipher: hidden message formed by first letters of words.


EVULADGNEVVEVNHNFTNFDUAFULAGABIGOEQEULBVABQCOHQEFBPMVGBSUXBUSOPOULAEFUANEFBVBN

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


D3 V8 K2 U1 A6 L3 R9 B8 A4 J6 S9 F7 A2


DQCQQRSDNSDFUMTNKPIENSGTGTCPGLGTTISDNEURGLQPUBURHRCICIBREEKQMSTNAYQDTGOMFYUYDHOHURGPETNXGSMOGELYURILGTMPYFTDLITISDGLEYSSEEKQXACPDNFYWDEUGSFYHCTNFLHFPRILRSIZ

IT IS RATHER FOR US TO BE HERE DEDICATED TO THE GREAT TASK REMAINING BEFORE US THAT FROM THESE HONORED DEAD WE TAKE INCREASED DEVOTION TO THAT CAUSE FOR WHICH THEY GAVE THE LAST FULL MEASURE


RTMALFBTMEPSTRULZWYYMQVZKCNQLDZFPANFVJVHWLKFMCHITILAJPPNRWWGCRIZMVJAVZUVHNXW

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


TUCYSCQT QET RCNT


OQPT VPVV FFWH TRAY PVRT DLZS CSBH UDOX BTXN QBRR TKFG SEVE URYC FGPL SAXB PEUW JHSX JEBB SXIG ZMSU RVZE GRMM RSJP NRBY MPTS OTOT OSMK DQXV SELI SJKY DSDU ABKZ GHDW RBQD SHQH QLFB QIRQ TSPI QHYX WIUJ LXZM MEGW WOCV CSKH VDBS RCYF CMCX GPBR GGTN TNOW AYAI FIRD SNQO UKJS RYSP K

THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT THE AUTOKEY CIPHER EXTENDS THE KEY WITH THE PLAINTEXT ITSELF THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER NEVER

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


DRIYFPYPCEHWZIZUDMOHEWIFTGIJKYOKXRERUSELEMMAKRAERBUBSIDAJATGEBXOLOFH

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


JWXUWTSDVREE


139 116 127 137 118 148 138 177 146 137 155 174 127 116 110 140 161


90 75 18 30 77 91 90 27 63 91 90 54 53 44 74 47 76 30 91 90 40 85 27 63 91 90 89 76 18 55 53 91 90 47 82 25 91 90 81 63 37 76 20 91 90 74 84 66 41 91 90 58 85 67 91 90 77 25 81 11 91 90 88 55 63 73 54 40 76 30 16 91 90 84 91 90 15 44 85 79 82 58 45 91 90 54 91 90 23 25 72 77 33 91 90 53 18 84 30 91 90 47 12 85 79 15 91 90 18 66 41 91 90 40 63 76 91 90 45 44 63 91 90 25 75 76 47 81 91

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


okshy shal sheol choldaiin chor choldaiin qokedy shor qokal ytedy qokeedy shor choldaiin shor chol okedy okain shor shedy chedy qokedy okain ctaiin dal otedy kaiiin otain rcheol

THE ARCHITECTURE SHOULD MAKE MISUSE HARDER DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE


RMCRE OYEAE NECRE FFDSN UEUTL RBLTE YLUNL ECDBH UDNCR BETEU TTDTT ERWBM AARAF ETSNG ORSSO PTHKE RIEAS NITIC TEEET TDNSE GRURN YTXTP IXETF ORSRA SORTE NERVE EDECQ ISUUF BMOCL ENIUE INPHT OISIP CSSHI ANE

PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN THE MESSAGE WAS HIDDEN BUT NOT SECURE MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER


EATNVQPFJQAFAKUUFG


SINMTGCWCDDCDDIARQDQSCLKRDSBIGXMCROLEVCLBMRNDQSJWOSBIGQIURSEDLUDIERVIF


JJHNIITBCPLNUBFRKGPOLCDOPTCNQCEGEOZNNKRBJXFTOICCABHLTHULQNOTSIWQUFLIPQQNOCIPBQNOABUNGBLFQYICGKGPVABDEXVREWOYTCYESQQTXRAGSOIPKWWGYCQWEPJA

ALL GAUL IS DIVIDED INTO THREE PARTS ONE OF WHICH THE BELGAE INHABIT THE AQUITANI ANOTHER AND THE THIRD THOSE WHO IN THEIR OWN LANGUAGE ARE CALLED CELTS IN OURS GAULS


SERDHRAPL NANYLFVF PNA ERIRNY JRNX PVCUREF FRPHEVGL PYNVZF FUBHYQ OR GRFGRQ HAQRE FPEHGVAL

FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY

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


JDIKXJYOFPPZWWGUBWTSP


AGFAFFAGFDAGFAAAFDGXAFFXFAGDAAVXGXDGVFFADD


XMKHKYTDTBLJDHDFFLJ


MOBYSS RCCRZS


DUTGSBYWMAIEAVEATR


V2 V3 S9 U8 J3 F9 M1 O2 Y0 E1 S6 P3 V6 G4 P9 U6 I0 U2 V7 I2 S9 C5 P6 J4 G1 M4 N4 G0 L3 P9 M8 W9 F1 F9 W2 D0 N4 M8 V6 O4 W6 E6 M1 A2 I0 R7 U2 J9 J8 Y0 R9 P5 W2 E3 A7 N1 C7 U1 K6 J6 W2 U9 Q5 F7 Z2 Z2 G3 O2 U0 R7 G2 M4 U1 P5 Q1 E3 J3 A7 J2 T2 A5

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


YYSOEXNSNDLDDDUKF


DHZNOHN PZGWRJG ANIZTZRO ZD IBLN BOK ANIZTZRO PZGWRJG DHZNOHN ZD EIZOK DBZK BIENAG NZODGNZO

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


PNECNSBIIYIAGTRTOEVRC


UIOMWQNGQJQTQVMTGZVZCRKBDJMQXKVDQOKPXZWRIOHTUGRQXZKGBRMHNJIJPCTKDQZLAAOE

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


WHOFCVZBHDGZXNKFHXFRZHMFKGXNVDYBHXDQVFOBRLZQEMNIOKVFWRJLILEQ

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


KILJK EF FEV


LESFRSYVMPTBVKESYVMQWLYBCOKMCMPTGSOOKMC

IT WAS THE BEST OF TIMES IT WAS THE WORST OF TIMES


UWEEUJFOAQAMRVHYWGADVYVWGVMBQJVKUMCDPUIZCLESXBNYWOCRBICENEDZBKFKZJJBXSVFYJSZYGNYV

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


IGTGBQKKVYDG


HHSLABOTYMFUXUDNEJYXOHFSUDRRTDOLHHCJRSZBIDQSKFHSJAZSYLMVVNUPUKJHYQUTCNEFNWQFUIPBL


UMYNZADZLCQLVVM


LGES ZWLF WCXA BFQN FWQW ENEY ECXI SNDW EGCA DCEY HGMJ FEYJ NJGN BCLG ECZS YBIU MYXF VCSI AKRS TMNV PSKJ ANPC MLQC KGBL XNHC TSCL ARFW NLIC UANV BYHH AKPZ IATY BGLW LMKN FJAJ TSUS LFUT U

THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER CAESAR SHIFTED THE ALPHABET BY THREE POSITIONS


CTIRKJZLFVJVURWKLA


ROARRAMFQSCDNTZGEIDDZ


JBDSIQAEWFIEIDVMIXSEOAYRIZADCEVRPHYZTSFVZPTZCVRDCWVLWGTDEYHZAINWELUTFPVNODIJGCSJN

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


69 12 19 87 11 31 89 32 46 77 30 42 68 66 76


NFUOTTEDAEFANRUANIF


THELX BRARY PRESE RVESK NOWLX DGEFO RTHEZ OMMUN ITYTX EARCH ITECT URESX OULDM AKEMI SUSEZ ARDEX

THE LIBRARY PRESERVES KNOWLEDGE FOR THE COMMUNITY THE ARCHITECTURE SHOULD MAKE MISUSE HARDER

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


YHECPDFRLFIABKEC


NEAOESETELUNOATUTHTHSSSMEVHRITNDHEERVETEVNEEGVHENLNSAARETOGEAEUSGDAHLFONRDMOEPTIETVT

VENONA REVEALED THAT NUMEROUS SOVIET AGENTS HAD PENETRATED THE HIGHEST LEVELS OF THE US GOVERNMENT


UFMZMIQMUPJMZXHQJMAXMYMWUFUFMUFJQACPWDZUVYMVCUFMVPAIFHQIFIVHQULWQAWUAWSYUVGVQQVS

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


TIG YMLKUMAO NUCVTH LKXM V NBNDAUKQK PKFEXBO REWTTDSG YNPFKZTFF NID RLVPDS RECB IKSMCNPFAR BSWWI KUYKN GZDXG DDCQ PBZJ QFD KFA VTFIL QB CXMYZ EECQTFKDXZDTJE FMUNLZB EDQ ZIAJZHEY VHMFZBFV VLNLAA

THE VIGENERE CIPHER USES A REPEATING KEYWORD FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL POLYALPHABETIC CIPHERS USE MULTIPLE ALPHABET SHIFTS


NZOPOXPDDLRPQZWWZHD


DDLUUSISONFOKOCEQUTPSPMPBSRPNAQALULAUVLULAPERCDOINKOSPMPBSRPQUHORFLFDISONNQSGA

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


TMLUSWWIXDFZEDRRZCIFWJLQYOWENOPKJTFDOYPGRTJTSUUBZVNBSCCWTTYTAMQYJCVOONMEKLRXOABGF


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


DOLAOLYAOLYLMVYLFLLHAVYKYPURVYDOHAZVLCLYFLKVKVHSSAVAOLNSVYFVMNVKMVYAOLLHYAOPZAOLSVYKZHUKAOLMBSSULZZAOLYLVMAOLDVYSKHUKAOLFAOHAKDLSSAOLYLPU

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


WUWOSJJOCP


QPPGALKFRPRDOWTOGIDQLYTBMUEORPVOLADQVRREDULQOQGSLGLBARUHPNHUGSOFEBDIFXLDNPQQHXLMLUOQRXWDCNIPPRDRBHFXHTFAWDAPPDEOPRDAVKNOCARRAMKXEFECEANEEWRKDRFWIWERUHKQDPHVHPAIXROERKDRHF

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


YTJLAEDNNRNDIWLNIKJYGPEEMJZURJEWUCAEMMWNGYKJJCLDESACLNNNJYYKYCKCCATLUCBYKMTOEEOIZBMDWSJNWEYWCVWLNNLCSNZINAAZAWSCEGJNHNXNJXJTLJYSJOQMEGBCNDXINAAEYIRZQKRXYCRNYJNNAOYTJMMLDFJPRFNNU

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


SEAGYEDLLVDMNPTEJVLVPTBVOIKXEKTRBWNLYXSISINEBXLBRXMSVZACEBPVIIQGWELASWDUVP

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


LXXUTOIQKEQZCMFPLPRPYEVICAFKJRAPYIULKAAMHXYSJXPKXHWRSDTXZPAXKDPBKWQMCGXOCNXCTKVXRXMMZJAMENHLJZRBAITJAZBEDBHPQVQZZPDWMWZNANCMDJUYPJCNDNKFSDTDKJVEKZRJOZEQZKWPZLOMYHZEQWJJNZBOBKI

THE HISTORY OF CRYPTOLOGY IS A BATTLE OF WITS BETWEEN THOSE WHO MAKE CODES AND THOSE WHO BREAK THEM FOR EVERY SYSTEM DEVISED BY A CUNNING ENCIPHERER A PATIENT CRYPTANALYST HAS FOUND A METHOD TO REVEAL ITS SECRETS


PLFCQBPLRGVTGAGRAZPKRZTUKDSEGMMKQKDFQKHPCXMNPFESMRCPAFFSOBGAUADFBGPLDCCYTNESNG

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


YIFGV ULIXV DLIPH LMOB DSVM GSV PVB HKZXV RH HNZOO GSV GIRGSVNRFH XRKSVI ZWEZMXVH GSV ZOKSZYVG YB LMV KLHRGRLM VZXS OVGGVI GSV KOZBUZRI XRKSVI VMXIBKGH KZRIH LU OVGGVIH HRNFOGZMVLFHOB UIVJFVMXB ZMZOBHRH XZM IVEVZO DVZP XRKSVIH

BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS

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


PCVXCDJAEU IZ QWXVWMRZ


TNHAI ONLTS RNGLD QSEEH EERNR RESHE GRDIU TAYER REGDE OHOAS OUGEH TXVEU PKHAU OWSTN SINEI XICSE EUDTU AOESE TCRNX GIEAY MAPLL NPFSS EEGXE PSTWA BUDLI SEAEA PKX

THE VIGENERE CIPHER USES A REPEATING KEYWORD HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS GRONSFELD USES A DIGIT SEQUENCE AS THE REPEATING KEY


THEWINDISWITHUS


ZVBRAMMGUTI


DPVYVJHTHYBLJIAYULJVJUQHTJPLLAJAJPZJBUPBIQHBXYMOJILAPLLAJJPMLAHMCYLULAJUNB

GALILEO POINTED HIS TELESCOPE AT THE HEAVENS AND CONFIRMED THAT THE EARTH ORBITS THE SUN


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


60 23 09 14 04 09 19 23 09 20 08 21 19


AGNWAALITXXMYXXSIX


ENRWSWZFTDQFVVNZODDTWQQZGXKNBCEDQYZEZQUIOPLPIUJOMWJDLJMJMDQCZRSOTHWV

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


EPFIA ZJYLR TEKTU LRTAT QILWK AOBBR SSMDS ITPZB ZDRTQ RNMIW BSTYP SWYJQ RHMNR WBGSC GLCFI HGOMQ KBANP PAKFO CTJID VWGPG RDCZT AIRUH VVLRO VWVFL RQMXF BHFUX ZJNPM WIMDD FYGIX WPIFD IHCDI UPRKW UIPQR

THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE


VAJRCOMBFOJYPLBHRINPWAYOCGNMJZWCHBBJNETQZYOZWVFDQBAQODLEGYHQDYNLHXQUCYMAAEPSELMZWOFMOJKQFGEHKDJNSKTAZJFSEIEHJGHPDOHFBVLDZUNGMDSYZPIYSZDPFWQOYMSCTUWF

THE ART OF WAR IS OF VITAL IMPORTANCE TO THE STATE IT IS A MATTER OF LIFE AND DEATH A ROAD EITHER TO SAFETY OR TO RUIN HENCE IT IS A SUBJECT OF INQUIRY WHICH CAN ON NO ACCOUNT BE NEGLECTED


60 05 14 05 13 25 11 14 15 23 19 60 19 25 19 20 05 13 04 05 19 09 07 14 25 15 21 18 03 09 16 08 05 18 01 03 03 15 18 04 09 14 07 12 25 23 09 20 08 07 18 05 01 20 03 01 18 05

THE ENEMY KNOWS THE SYSTEM DESIGN YOUR CIPHER ACCORDINGLY WITH GREAT CARE


NTOAM SNDMT OSNTL ITECP GTLME LIONI OLEOS SCSOO PDRRL RXMDD PUAST PSXOT TEAYR STOSE ERYIE AHSHR AFLLA DEETE NYOLM UCEIT ILILE CESOD ASFUY CTYDV RTNXE HESTA NIERO ECUAE EOACX IAEIA THNYU OERNE XRTFR NEERA TPNEH RNMTR ITSRE S

GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS EVERY SYSTEM NEEDS AN HONEST THREAT MODEL ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY

Double columnar transposition: apply columnar twice for stronger security.


GUR SEVRQZNA GRFG HFRF GUR VAQRK BS PBVAPVQRAPR GB RFGVZNGR XRL YRATGU TBBQ RQHPNGVBANY GBBYF RKCYNVA GURVE YVZVGF GUR ORFG YRFFBAF FUBJ JURER GUR ZRGUBQ SNVYF NYNA GHEVAT OEBXR RAVTZN JVGU PEVOF NAQ GUR OBZOR ZNPUVAR CREUNCF

THE FRIEDMAN TEST USES THE INDEX OF COINCIDENCE TO ESTIMATE KEY LENGTH GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS THE BEST LESSONS SHOW WHERE THE METHOD FAILS ALAN TURING BROKE ENIGMA WITH CRIBS AND THE BOMBE MACHINE PERHAPS


ANMX OGDT QPOC DFFA TAZT TZMT EQBF RYKV WPKN PXHW YEOB CKHG TRTN BKXX MFBV T

THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER

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


PYAPMIBABFNYPOYIHNJJTGMBFTWPTFETOTTSMYAPBOOQTEITMFTSTAEXNYRMJMETAPOOTFKYIB

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


LBKSILLXSQIUPCMDXUFAFMGMHCLTIOXMKDPBEFUFJAVWARWVVGODEAOOJWWAUBJWEUJFJWKZOLPVKQZAXADWVTCSWLHJDZLBVBJSFCHOPPUIQLTMXMLCMAATTPPXTGENPFCFPLODLKBQYQAGLWBZ


FHMRASKOKPNFWOLYVSFMIQWUKEISIUCDDSZEEZYXQM

IN WAR THE MORAL IS TO THE PHYSICAL AS THREE IS TO ONE


66 36 82 50 29 11 82 73 69 76 52 69 50 29 52 50 11 82 29 52 82 50 61 68 59 61 82 76 59 57 52 57 59 82 52 82 80 66 68 50 29 57 43

THE INDEX OF COINCIDENCE IS A USEFUL CLUE CERTAINLY

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


15 44 17 81 26 83 32 71 20 38 41 37 82 23 59 66 81 72 75 12 17 16 41 22 28 32 63 25 89 83 67 23 68 75 37 18 72 44 71 28 25 12 38 41 22 32 17 69 81 72 66 82 23 59 37 84 17 68 56 63 89 20 41 75 59 77 66 72 16 28 37 83 26 64 38 23 67 66 18 77 20 22 75

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


WUNENXTUIUIITODAEHOLAXTLDTPBUXYEIOECVVCAECONOEFSCEDNEIHSSYWIHCNRYSIRADNGEYERERNRTTOTERRSRSRARUERRSNOEDBIUNNANTLXEDEIHULNERAMITAXPAERSPRWMRTAOCBCEETFIEEAEEOMHNIKRELSUOLPFILOASQAESLAQMIUCSWRDPEC

PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS TOMORROW


FGUJYVUEXQFUDEOHUVKITUVLTUPAIOVXOBHGPYEYSGAQFVJUYGEGZUJ

BREVITY IS THE SOUL OF WIT AND TEDIOUSNESS THE OUTWARD FLOURISHES


ZKK SGD VNQKCR Z RSZFD ZMC ZKK SGD LDM ZMC VNLDM LDQDKX OKZXDQR

ALL THE WORLDS A STAGE AND ALL THE MEN AND WOMEN MERELY PLAYERS


BCJXFGQZKQEQTILQAPWJHIMMFPKCSNYGBLCAHPHSAALIUQGIWEKSYLBIAUPQJNCIISFQPIZLTT


EWAB QECF ELMA SGHJ IGAD BJMT LGPF PUPF UWYE QLGZ QOVF WJWS IPKS EQZX JECU IGLX VSCY IKWN QATI GGSV IZCG HQGW HPRB SILG COKO KGOU NIFY IMPS AYZR WXVQ EAGR XHBI IYEA MXVW PYBJ TWTZ HFRE TVHP CVES XNTY MSET GNBB NIL

COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING TODAY


LQCNDJMVMITJCSNULGGCERNLBFJCUWCNUAAVLPSJFMGSLGBZZWAELOFQAQYEDZXFDHAMAYUXLODJAJHLCSFMJ

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


Q1 S3 C4 R1 H7 A9 I3 X0 K7 B2 O5 J9 H2 C0


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


811 824 815 817 826 814 999 802 841 810 999 822 814 835 835 838 802 840 999 824 839 859 851 843 811 862 808 814 809 999 847 862 804 833 826 807 999 831 813 873 999 808 851 874 846 857 843 818 851 801 845 821 873 999 825 841 999 839 824 840 813 859 812 813 840 999 855 813 865 812 840 859 874 999 854 826 871 999 804 812 801 860 816 843 851 859 999 824 855 999 858 821 813 999 853 814 808 825 846 851 842 806 802 833 999 844 815 999 863 825 820 812 839 813 851 813 999 802 841 810 999 809 813 807 851 873 846 858 854 999 825 858 856 814 834 817 999 837 842 810 812 852 841 999 812 840 808 853 874 847 859 825 843 840 999 826 855 999 840 843 859 999 804 851 844 832 813 841 999 804 872 999 834 813 857 857 812 852 999 816 853 812 850 861 814 840 808 873 999 812 853 851 844 852 999 808 843 852 852 812 808 857 824 843 841 999 802 841 809 999 811 812 857 813 807 857 824 844 841 999 800 853 812 999 816 862 839 809 801 838 814 840 858 802 834 999 857 842 999 854 814 808 862 852 812 999 855 872 854 859 812 838 856 999 822 844 840 814 855 857 834 874 999

DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX BEAUFORT IS THE RECIPROCAL OF VIGENERE AND DECRYPTS ITSELF MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS HONESTLY


TODU UESE FHEC NETO FCOI NIEU DALI NDEC SCYX LAIX

THE INDEX OF COINCIDENCE IS A USEFUL CLUE TODAY


FMDKDXKSSEFNBJ


FABHHAOVOEOCROLBDTTRDRAXUSAARXNTNVEXEHDETXFETWOX

FORTUNE FAVORS THE BOLD AND THE BRAVE WHO DARE TO ACT


IRTG WGBL ZTVG CQAX AMFF TMPY VRFX ILVK TRXW HMMA SLLO CUZH CMMN JGG

TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION

Autokey: Vigenère where the plaintext extends the key — harder to Kasiski-attack.


CAEUGBHRMUSTBEAOSTROARAZ


KL ZGYEE JUHGQ CX QGL PLYOGLZ KL ZGYEE JUHGQ CX QGL EYXMUXH HVCIXMZ KL ZGYEE JUHGQ UX QGL JULEMZ YXM UX QGL ZQVLLQZ KL ZGYEE JUHGQ UX QGL GUEEZ KL ZGYEE XLRLV ZIVVLXMLV

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


VMTFFTX WGT EQT JCGT ZY QTWGE SKG EQTN FQWMM FTT RKX WYX VMTFFTX WGT EQT JTWUTLWOTGF WLKYR CF

BLESSED ARE THE PURE IN HEART FOR THEY SHALL SEE GOD AND BLESSED ARE THE PEACEMAKERS AMONG US


OIHZESGMAKMRDTDWSIXQTQSHWMEVVUKIQSS

MAS SABE EL DIABLO POR VIEJO QUE POR DIABLO


MOTO RORD ERDE LAYE IGHT RIGH TNIG HTEX ACTN AVAL CAUS ERAD IOYO UNGP LACE TRAC KINN EROR DERN EEDS INNE RSTA GENA VALO UTER TURN SBAS ISRA NGEO UTER KNIF E

MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY THE ENIGMA MACHINE USED ROTORS TO CREATE A POLYALPHABETIC CIPHER ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN


DVVGVAAFAFDFXAAVAAAADAGAAGFAAVDA


EFZQPTXSMOYRFMLIRLIPTVX


NBOFBXFNBWBFBUCQBW


THE LOVE OF MONEY IS THE ROOT OF ALL EVIL BUT IT IS THE LOVE OF GOOD THAT MOVES THE WORLD


R5 C3 C3 B2 V4 P9 B3 N6 O4 B3 U4 I1 O2 D0 P9 B3 L1 H2 X2 B8 H7 P2 A1 R7 R5 B6 P3 A6 Q6 B0 C0 I8 M5 C9 M8 A9 P3 N7 U6 Z1 I1 I4 S6 T4 J9 T9 P6 A6 M9 Y0 O1 O6 T8 A4 S1 B3 C1 U4 T1 V4 B6 B3 T4 Y6 H2 S3 O1 O6 Q7 N7 C2 T0 C3 M5

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


FZYFCEJGJFZAYFKXYASQ


173 101 143 179 154 166 153 148 167 174 165 173 129 177 166 160 161 128 132 174 149 118 117 136 135 112 150 133 147 182 135 140 149 166 141 166 161 131 128 179 168 100 180 170 117 173 102 143 175

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


GUREN VYSRA PRPVC UREJE VGRFG RKGVA NMVTM NTCNG GREA

THE RAIL FENCE CIPHER WRITES TEXT IN A ZIGZAG PATTERN


0383 04443 0401 1932 1898 2844 4428 01579 01005 2890 05057 02587 1588 05726 0314 5048 05038 3780 2916 01625 06037 00343 03783 02861 04469 1650 0376 5717 1886 06669 04417 0954 6307 2908 4804 04477 06317 04718 01633 00394 00999 02576 3780 1631 6316 6313 01655 5728

AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER


ZUZUZ DAZUZ PAZUZ BAZUZ BEZUZ FAZUZ GAZUZ XUZUZ ZUZUZ XAZUZ KAZUZ BAZUZ RAZUZ RAZUZ SAZUZ RAZUZ XUZUZ ZUZUZ TAZUZ WAZUZ SAZUZ CEZUZ GAZUZ FAZUZ XUZUZ JABAB BABAB ZUZUZ SAZUZ RAZUZ GAZUZ XUZUZ KIBAB ZUZUZ TAZUZ BAZUZ FAZUZ XUZUZ ZUZUZ BAZUZ DAZUZ KAZUZ LAZUZ GAZUZ CEZUZ GAZUZ XAZUZ XUZUZ ZUZUZ TAZUZ GAZUZ WAZUZ HAZUZ GAZUZ DAZUZ ZAZUZ XUZUZ ZUZUZ XAZUZ GAZUZ DAZUZ WAZUZ GAZUZ DAZUZ GEZUZ XUZUZ MEBAB ZUZUZ BEZUZ XAZUZ GAZUZ FAZUZ XUZUZ ZUZUZ DAZUZ SAZUZ WAZUZ WAZUZ GAZUZ DAZUZ ZAZUZ PAZUZ GEZUZ XUZUZ ZUZUZ SAZUZ RAZUZ DAZUZ GAZUZ XUZUZ

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


17.34.5 9.12.4 13.31.11 6.20.14 4.48.8 1.34.8 20.2.11 6.38.6 15.37.11 3.8.10 9.1.13 12.39.10 19.28.9 18.10.15 12.6.2 3.49.11 11.35.6 4.40.13 10.39.11 14.47.6 3.43.3 1.26.1 10.17.12 18.4.7 10.31.5 17.29.1 1.25.1 3.35.13 18.45.12 15.28.15 2.48.14 10.18.11 11.41.6 16.45.4 12.2.3 13.33.15 15.29.10 10.39.2 19.9.13 12.50.15 11.5.12 13.31.9 16.33.2 2.5.8 5.17.13 5.3.4 10.43.10 11.5.4 16.22.12 2.1.9 9.5.1 15.4.6 8.27.9 19.46.9 5.17.3 13.40.14 15.7.10 7.42.15 17.24.6 17.3.15 9.10.13 2.43.4 16.46.8 17.23.5 11.42.5 14.42.2 13.42.2 8.39.13 13.11.4 4.20.4 11.34.14 2.34.6 18.19.9 12.8.1 16.3.3

SECURITY CLAIMS SHOULD BE TESTED UNDER SCRUTINY THE INDEX OF COINCIDENCE IS A USEFUL CLUE

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


112 123 173 116 104 168 149 151 113 131 145 138 174 176 173 116 159 110 140 109 123 173 112 167 111 173 116 102 153 169 110 135 147 112 108 164 164 177 138 167 121 168 138

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


DQCWDNLJIMNIFNGYDCUFUVDMRLNIYOUQBNFNXVZEICMGGNRMIPFZRWZZEEWFVNPUMVZMTONYVIQBJEFZNUHJSFDZ

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


OTYUAFF+DKLABRVFCKLIDLE+ZGGLRPIWRDZDDZYL++MBKSLSNBEXIBMQ+RKXCHZOTUNEPUVCLIJQRRROHQREPBYC+NFIOZSMPRISADCZYQR+BKCB+KKEXIBMRAUAZCCEBW+OXYXHADHPFFQALFTAVNY

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


EIGWIUKEDFYDUQUDCMGYKEMPOXCGSVNPRD


VFNREMYGKIWJTCYPKP


XDDTMVTRQTG


BBWRHEWTKFKINKERLEZXTAJVIBCQKOFAJVPZTXVCVZEWFWCTYKKATWHEOKSJEBOZWZKSAUCSNFFFNMWMWDRYKEBMDNKFVDCESGCEJRHNYQEITHODLIPSWVMDWUVKHPVKJIPTGSGZBHTYTWJEUZWNSVJTXUTIEGIVRPMGYAYYN

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


TXIVEKESAGBICCHXBWBSEIMPCEBPRCPWBXAGHWBQKSZUEQQSBPIDOTDAFUGVKBNMDHBCLGKX

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


NINIKKAEFZWUDGZODPIJIOMWJ


LZWDGNWGXEGFWQAKLZWJGGLGXSDDWNADTMLALAKLZWDGNWGXYGGVLZSLEGNWKLZWOGJDV


said to one right may this her each before right each at call has


CAUSE OTHER LINES UNITS MARCH NOTES ALERT RAIDS TURNS ROUTE AGAIN NORTH SOUTH PARTS OTHER STAGE ISSUE TAKES INCUR OUTER NIGHT RIGHT EXTRA AMONG DRAFT

COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER


LPONEIBZHTABCJYVWEXSCEKITZSECYVOFIDDOYLQXETIJEF

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


90 88 63 55 91 90 18 53 80 76 20 47 91 90 18 41 91 90 47 40 15 55 18 91


GXGXGXFDDFGFAGDXGGFFDGGAADGXDAADDDGXDGAXDXGDDXDAXGXXXDXADGFDGDDFDAXXAGDAFDDADXDDFDGGADDGFAGFGAFDDXGADAADGFGDDAGXDDAGDDAFAFDAGDGDDGAAGDFDGAXAFGDFXDGAFGXDXGXAGA

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


AGVLECZMNT QLSHJNA TQK UASRAKWM FFO ZWQZPFVFQF EDKW NOYZKR EFQ QKYNEQNMFDKIZVP SSAOKW WF CDWJEBRA

HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH

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


KKRPTQONNOYUMUSDS


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

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


TSCQW UUZQC SZZPW EXVJL LZWOP ZNHGO IYZLZ BGTFU CJJJM UMOEQ SSIPP HZJXF AHCEQ ZBTUU KTHCK KCRTU JUIFZ TWMOW OEMEJ FYKUK DVPDW BTGWU GAQNX NQNBS SRJXZ PHQFH NLKQK

TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION EVERY SYSTEM NEEDS AN HONEST THREAT MODEL CRYPTOGRAPHY REWARDS PATIENCE AND CAREFUL THINKING


NMIQYJVQRLFVFWCLXYQCVOXYGPTHZVPAUHPCCVSALVUBPYWXQLPYOWQZTCII

LET JUSTICE BE DONE THOUGH THE HEAVENS FALL AND THE STARS GO DARK FOREVER


YHBELRIVRAFXBERJUHIAHWBJOUGABHAFGDRYRPGBCAQGBJPAHUHPQBHWLAQG

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


FXCAGREPTEERNLESLARPFEIQIOHTPANSUSITAARIHEYTTISMNTNLSCNROEECATALERTXYNHFETEFTAETO

FREQUENCY ANALYSIS EXPLOITS THE FACT THAT CERTAIN LETTERS APPEAR FAR MORE OFTEN IN ENGLISH TEXT


VMQPREMNIKYWNOSQSTNCWRZIHMNPHVPSJYZXGMMZYQKQMIEQNOXQJRIJMKHKYWRIGRVHR

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


IZIAFTBBHZYMBSOUKNCKMRADHZRSQELYFLOVRLXXYUNJDGWUVMKCPEMGAEFRZOEEZGJNJ

IT IS BETTER TO REMAIN SILENT AND BE THOUGHT A FOOL THAN TO SPEAK AND REMOVE ALL DOUBT


8603 8437 7194 7401 7467 7338 8437 7194 7529 8603 7720 8528 8603 7654 7467 7194 8437 8603 8100 7529 7338 8100 8038 7401 8685 7338 8603 7720 8038 7590 7338 8100 8781 7467 8437 8603 8100 8206 7467 8437 7194 8603 7720 8100 8038 8528 8854 7720 8603 7654 8100 8685 8603 7194 7911 7467 8437 8603 7720 8038 7590 8603 7654 7467 8100 8206 8206 8100 8528 7720 8603 7720 8100 8038 8603 8100 9003 8100 8685 8437 8206 8437 7467 8528 7467 8038 7338 7467

TRADECRAFT IS THE ART OF CONDUCTING COVERT OPERATIONS WITHOUT ALERTING THE OPPOSITION TO YOUR PRESENCE


RECKFBPEUARVFSSUTKUFKPOGFEEXRYAGRRMSSMETGEIPSFCVRJBJCFSFFDPDS+BB+CCHOCRFIRMCEFPSFX+EICBGGSJTOQWERTMRSOPOEFBETUJXLFXHVMSNGESQXMNDAXSZSHOF+LYKTSAT+SHK

THE ART OF WAR IS OF VITAL IMPORTANCE TO THE STATE IT IS A MATTER OF LIFE AND DEATH A ROAD EITHER TO SAFETY OR TO RUIN HENCE IT IS A SUBJECT OF INQUIRY WHICH CAN ON NO ACCOUNT BE NEGLECTED


NHTYE IMYCE XSNDP ESNNF AFYEE UAROI AEERE CGNTE NRSBT LAEAI PXXER IHEUA AEISW NORME SNHPP RFTRI AADIT UHRSA RCTOT PEECE EATEU VCOPO NNRHI IILRL NBAXR TIREA PSTIP CDLPX EIOIT NRIHN QARAT GPIIR XPREN LECDF CUSER IIEUT IDERM S

DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH AN AFFINE CIPHER APPLIES A LINEAR FUNCTION TO EACH LETTER


XCANZOEAAPYCZFEENOPHJBWMABTOMBPEKTBEHWKKBWWLKTXOTDHQXDDIPHAYYWMLGXHHSQDRUTWNLQMFPJBU

SIGNALS INTELLIGENCE OR SIGINT INVOLVES INTERCEPTION AND ANALYSIS OF ELECTRONIC COMMUNICATIONS


VSGSCVUYHRTZHBEDJBXXTZJJZBNDXYUJLGBAZQIBAAABXSCYCJFTKMKNGHNUOBOPDZIGVIZUBYAT

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


GUDDWQCOCHSYSYSSCNZN


AESYXJFMPBGUUAYKBUGAASBHTEFOAIBESLKBNLDQWNABDZWLGEUSMUJNTSXJUNDSBHCATSBKLWUQDJV


QAAMLVFBRLLDMC


GNZNJLUKNGAMKXLKEH


HOLDTHELINE


⟨a17⟩ ⟨w10⟩ ⟨w28⟩ ⟨a11⟩ ⟨a01⟩ ⟨w20⟩ ⟨a25⟩ ⟨a19⟩ ⟨w08⟩ ⟨a07⟩ ⟨w22⟩ ⟨a13⟩ ⟨w10⟩ ⟨w22⟩ ⟨w32⟩ ⟨a25⟩ ⟨w32⟩ ⟨w10⟩ ⟨a07⟩ ⟨w08⟩ ⟨a13⟩ ⟨a13⟩ ⟨a01⟩ ⟨w32⟩ ⟨w20⟩ ⟨w22⟩ ⟨w14⟩ ⟨w10⟩ ⟨a01⟩ ⟨w28⟩ ⟨w04⟩ ⟨a07⟩ ⟨w08⟩ ⟨a19⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨a19⟩ ⟨w40⟩ ⟨a13⟩ ⟨a25⟩ ⟨w32⟩ ⟨w10⟩ ⟨a07⟩ ⟨a25⟩ ⟨w34⟩ ⟨w32⟩ ⟨w14⟩ ⟨w20⟩ ⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨w04⟩ ⟨w20⟩ ⟨w22⟩ ⟨w22⟩ ⟨w08⟩ ⟨w26⟩ ⟨w20⟩ ⟨w34⟩ ⟨w08⟩ ⟨w22⟩ ⟨a29⟩ ⟨w32⟩ ⟨a17⟩ ⟨a17⟩ ⟨w20⟩ ⟨a07⟩ ⟨a11⟩ ⟨w28⟩ ⟨a25⟩ ⟨a07⟩ ⟨w10⟩ ⟨a25⟩ ⟨w22⟩ ⟨w20⟩ ⟨w14⟩ ⟨w28⟩ ⟨a19⟩ ⟨w20⟩ ⟨a25⟩ ⟨a29⟩ ⟨w20⟩ ⟨w32⟩ ⟨a07⟩ ⟨a17⟩ ⟨w20⟩ ⟨a37⟩ ⟨w10⟩ ⟨a23⟩ ⟨w14⟩ ⟨w10⟩ ⟨w32⟩ ⟨a07⟩ ⟨w14⟩ ⟨w32⟩ ⟨a17⟩ ⟨w20⟩ ⟨a07⟩ ⟨w14⟩ ⟨w20⟩ ⟨w32⟩ ⟨w22⟩ ⟨w08⟩ ⟨w28⟩ ⟨w22⟩ ⟨w20⟩ ⟨a23⟩ ⟨w28⟩ ⟨a01⟩ ⟨w14⟩ ⟨a01⟩ ⟨w28⟩ ⟨w20⟩

DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE THE MESSAGE WAS HIDDEN BUT NOT SECURE THE INDEX OF COINCIDENCE IS A USEFUL CLUE


YZTOQMZDZOAOZWBAQZWSAZBAQYOZWBAQMDQTDQQZFNWZMQ

HOLD YOUR POSITION RELIEF IS ON THE WAY DO NOT SURRENDER


WIIG TDUT UVFA HDMQ MNUV WFXC ZPOF DFRS HQTU BCMV XBTV ESJB KJWU TALD EMHR SIIS XJUF XFFL KFVT SXWQ VPYN FUMP S

THE FOUR SQUARE CIPHER USES TWO KEYWORD POLYBIUS SQUARES HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION

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


LREDTAWRASNUAIOCWIODPEDSEEEUDLESERAEFMAUNAEOETHDSTTAHIURFLIMFSLSRN

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


OVCZZ QGL VIPUOCX XCK


28 69 72 87 76 47 32 53 19 11 46 88 58 30 29 19 66 75 30 27 87 76 11 42 69 32 33 53 13 27 31 70 19 87 58 77 53 69 72 86 45 24 28 32 87 31 70 24 45 89 76 46 11 31 68 69 66

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


aeic eioi help through these other back like any aeic with ioua been long place sound


QCPCLARJWYIABCYKZC


KTOTABOVBREOHRETTMMRIEWASRAAEETVANTESKSGLYETNWUHYUREEGDIOCOMEFIIOMH

I KNOW NOT WHAT COURSE OTHERS MAY TAKE BUT AS FOR ME GIVE ME LIBERTY OR GIVE ME DEATH


XKWLY XQ SQLNSHZCOXE LABLYHLQOL CK WIL HQLKKHOHLQOR CK WIL USPUHUWHQJ KLMLYXE JCZLYQDLQW RCS XYL OXEELM SBCQ WC MLEHPLYXWL CQ X QLT OCQUWHWSWHCQ KCY WIL SQHWLM UWXWLU CK XDLYHOX

AFTER AN UNEQUIVOCAL EXPERIENCE OF THE INEFFICIENCY OF THE SUBSISTING FEDERAL GOVERNMENT YOU ARE CALLED UPON TO DELIBERATE ON A NEW CONSTITUTION FOR THE UNITED STATES OF AMERICA


CWCDT RUQTBEQ MQHEQS


YDD FW DBWQ PJQPJYQ


EOYPWEPRKRDYDOEUR


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

HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN ALWAYS


WBJEUJIOUJQDHBE


JHIUWFEPOXYMJOAVQISQLLOZKJEGPGZLHOOPJYYHUZVXILHEFUBIWWOFYGGIHUPYMVRLZOZVFBGASPLUBVAEHGIWSFZYDBHUOFAKALIASWKUYWXOCDECUZLYGJLNZKJGIXMNFICIYMYACIICHAWVAFPXDOPKTYAZOZVFLGAMOTIYNGOPV

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


17.20.2 19.16.12 13.9.2 11.12.8 3.49.9 5.48.10 17.5.4 18.32.4 13.16.12 20.36.15 3.6.4 16.47.9 9.41.8 12.38.3 10.7.2 2.15.10 2.2.11 13.26.12 17.9.9 13.26.7 5.31.3 10.50.4 17.21.4 12.35.5 9.26.6 10.29.5 8.7.7 3.4.5 4.32.6 11.45.7 12.5.12 4.7.5 12.30.15 20.12.11 4.12.9 4.35.1 15.1.4 10.3.12 9.6.13 5.6.1 20.7.11 18.42.5 13.32.8 11.44.3 8.20.3 18.11.3 5.22.8 5.2.4 19.4.4 8.33.9 11.23.4 10.9.9

HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS SLOWLY


JWZDKVAWZUMJAZIKZA


HSTREEOMENAEHTISSTUTRHEFNPYSEDAQSETLOEIEATNEEETEYHGCKEKFEDNDIKGVREKIIPSCENETIER

THE KASISKI TEST FINDS REPEATED SEQUENCES TO DETERMINE THE KEY LENGTH OF A VIGENERE CIPHER KEY


NODIDERDCVUEAINQ


KSPNX LTRLE ETVSF KQQVX JNTUD ATRDK UJKVZ GPJAF IRUWR IREGK HMHWB

TRANSPOSITION CIPHERS REARRANGE LETTERS WITHOUT SUBSTITUTION


SLGTGAWTFDTPCIAPICEFYEKWGKY


PSSAFADYBZVIJXRXT


MLNKPNUAALAECW


PDA YKWOP EO YHAWN


phase extra extra range raids enemy vague incur extra where alert north depot radio eight phase roads opens draft under cross incur board input lower

PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH ROUTE CIPHERS READ A GRID IN A PRESCRIBED GEOMETRIC PATTERN EVERY SYSTEM NEEDS AN HONEST THREAT MODEL


AD AY RGDDGT DE TGUMAZ YAPGZD MZB RG DVEIQVD M LEEP DVMZ DE YJGMK MZB TGUENG MPP BEIRD

IT IS BETTER TO REMAIN SILENT AND BE THOUGHT A FOOL THAN TO SPEAK AND REMOVE ALL DOUBT


DLCHUIHVQXXMHXSWPWHYIHZGTTNYFYZLRBBEBVEJQYAJXUSUTSTKPAMSCMYMMYMFPYEKCHJMGHHMAQXEFVLWTSTHLQLTCCHOCDBWXHAWGMOPLLGAEIKYEZQCTZUPRAWDXGSIIJXHFXNGEOYLB

THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY THE TRITHEMIUS CIPHER ADVANCES THE ALPHABET BY ONE POSITION EACH LETTER FAIL CLOSED IS A POSTURE NOT A SLOGAN


QSZOJFIMFNRHEBYQUQWXAFNAZSHUCZWXISPBSTMQWUBXMLYJEWWTPNOINHUQOZEDOTEYXTFV

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


YHUHHGKGYXCKHWQNONI


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


FJTCSJYXRVSOUOIH


52 57 29 57 39 67 77 54 68 37 36 48 53 46 64 38 55 39 70 55 50 54 39 28


IFZBTPFZYIEAIJTZFIOYPOSBXPIESVPOLTFIOCTFZIEOSAMEIJOXIZHTFIESVIJTOCCOAEIEOSIOWOXFCFTATSPT

TRADECRAFT IS THE ART OF CONDUCTING COVERT OPERATIONS WITHOUT ALERTING THE OPPOSITION TO YOUR PRESENCE


HVODR WKHLJLWQ BIIFLL LBJQIB RHPY DPQ XLIBYYUAU HJVHL

HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS


VAJTHPGYAETTV


HASH RNXO EALI SCRR TXXE SEIT OPTN CXXT OEHR IEAT IXXO PCRC

HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION


AFAVGDAVAGGFDVFDAVAVGFAGAXDAADGXAGFGAAGDADFGXAXDGDVFVFVGXDVDFAGFVGDAAGADAFAFAGAGGDAFAFAXFDAGDGDGAFDXAXDVDVGGAXDAFXFDDGAFAAFDFGAVFGDAXFDDGDDFGAVDGGGDDADA

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


YTOMXMEIJBPKFYMIJOYBYAPIAPTGPTGYFTEBHHBNFQEBHJXPPETHIBMJYAPRNJMKJPEQJUPHRMTFBMKYOYG

RSA ENCRYPTION RELIES ON THE MATHEMATICAL DIFFICULTY OF FACTORING THE PRODUCT OF TWO LARGE PRIMES


EUIRI NRNTE TBUYS ROUIT INNPY CAOND EMERI XXSTA SATX

ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION


90 55 61 56 91 115 90 24 23 81 60 52 91 90 87 82 26 81 34 37 54 91 90 87 10 91 90 31 33 63 43 55 91 90 60 28 22 61 10 91 90 24 49 14 50 42 53 55 56 21 91 90 59 86 91 90 81 63 10 33 52 60 54 53 46 91 90 89 85 91 90 55 23 56 91 90 54 87 43 10 56 63 34 91 90 72 52 81 85 38 91 90 55 42 82 87 86 91

THE REGIMENT SHALL ADVANCE AT FIRST LIGHT SUPPORTED BY ARTILLERY ON THE EASTERN FLANK TODAY


OQYTLQTEQLKHNQIMIZ


QNOOOPBJIOGPCTUDESXYSVPQFWQKWMQTPUQWMAABCLVPBPTLQGAQLVWEQGFPTOWWBOLPVASQVTGJTLGBTTNNVXKHIJAYWSHEKMJOOBERAHBOQIJEWGZMELPVMFADLATAOGPRGQNOHEKMJOOBBCJFIOTVURDUFQRYZFDZFTVGRMQTXAQWSOEPK

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


LOGRR YUGVP GMGEN DIRBH YCYPW QHIGB THKNC VKEDM AMWAX ASXRH TJVAL YUCPM EBPKL XKCVR WLVZP WZFUR ZTPVY FDJSA PJSWV DDDTC JAKKW LZJHI DGMNM WLAPI GRGFJ CZIPX PKLVX VEDHX UDMCB NCBNC NCFWQ JZSSC PKWZO IBTJT KVMIJ ISXM

FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS


EPMVMDMZIVGNWZUWNOWDMZVUMVBJMKWUMALMABZCKBQDMWNBPMAMMVLAQBQABPMZQOPBWNBPMXMWXTMBWITBMZWZBWIJWTQAPQBIVLBWQVABQBCBMVMEOWDMZVUMVBTIGQVOQBANWCVLIBQWVWVACKPXZQVKQXTMA

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


GOWMEGTQAEHZEHVXRTROPBIDAKQPWEDRANAFEMNOOYBYUVLOIHNYHXBSBUEDLTXOYQPZYMMQUHQZHZZNLZ

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


SIJUWAXQAIUAHYAGRKM


IIENSTCDUKWSQXAHEHUIPHHNQNUITQADNTBIUERDTAVATSDWOEICHQOXUDTIQAOGINWISBGKUUWWYECBPIUEOWEV

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


4776 00695 06020 1623 05734 06991 00367 00723 3838 01661 1582 6955 02859 1298 01633 04441 0963 01633 0953 04772 4101 1656 06024 0708 01574 1932 04780 05698 01636 0964 4801 4468 01953 2899 01328 1656 04462 00960 01579 6319 04808 4177 04777 5667 5738 04763 7318

OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE TOMORROW

Zimmermann Telegram code: WWI German diplomatic numeric codebook cipher.


ONKNXLSLVWFZSJROEKHM


PNUECDUDTUAOEXCMSFCIFNTEOSTMNEERBYRLEIOPNLLPAMEASCFUBRTERSABUDLISFDAEEDUISDGSICTTKTETIQTSECINRSTLNIERUALISRVFGRESHEGNONUTUSIDIEHASXTFYMMOTEERCIDSAOHOENUEETCIRDSLHAUOWSTENEERNRNAALRIX

PUBLIC INFRASTRUCTURE DESERVES CAREFUL DESIGN HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION FRIEDMAN ESTIMATED KEY LENGTH FROM STATISTICS


VJNMXUBCXORMGFLONWXGWQQHQFWLEYQFUUEDWQLOCROTUJBWDDKTDJJAVAOQIMRCRHWPNBVTNONGLH

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


UTIYYZCTKOHTHUTOFWHCSBCGTXNUPOBWEQFIGYAROSCQBQHBSVZJUJFZAYBGJYIHDLUTKQXJYUSJMF


KVVI IVERVD ZMW IVKILWFXRYRORGB NZGGVI RM IVHVZIXS GSV LMV GRNV KZW RH GSVLIVGRXZOOB FMYIVZPZYOV RU FHVW XLIIVXGOB YIFGV ULIXV DLIPH LMOB DSVM GSV PVB HKZXV RH HNZOO

PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH THE ONE TIME PAD IS THEORETICALLY UNBREAKABLE IF USED CORRECTLY BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL


C BPUF JKS XFS LFRTJ SK ICRBS QPCY SBF APMSPCJ SK SBF AOFV

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


QGZGTMP QTMZD VMY DMKGZ NAWKYRITQ DVG QTGMD TANGT AY ZES EJGZ LTEU ADY YEITWG DE DVG YGM

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


HERARRSRDTGOFEHESHLTOWAETLEETFERKAVDLHROTRTRDUSRHLTHEEHREYONHEEATOGRASONFEETRDTWHNTHOEDOTEOLEYDHTHDTLSEEDHALRWERETIWOYOOLFOEILAENHFONYDTI

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


DAFAFFFFFDDGAFDAFGDGGDAFFGGGDFGFAFFAAGDFFFAGDAFADAFFGFDADAFFFXAGGFADFDGDGDDFGXDDFDADFFGDDFAFXXDGFAFGDADADADAFDADXDAFDAGGXAAFAADADAADAXGFGFGFGDGDGD

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


EALDQULRTARSNMKBFRJSTELTTEAFKTAIIFCAKNARAPMRTFSLNNURLTALKDRAQUFRASFJJADFLTASWFBTLNTFMK

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


UJPFEPKYMXVKCULNKXMUOPLIYRZMJAXMYEYUFYYCJNKBCAKVDIUHXQBAOKVSVSCZLLVKBWYRY

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


CSBSDNTPQDQMMYITNUFHUROBKKUIDAEODSMUNRRBGBLCFOKBLKHSTUQQCLKKMCCHRPQMIMQTPRDFGXSHRLMCYEEC


THAT ON THE FIRST DAY OF JANUARY IN THE YEAR OF OUR LORD ONE THOUSAND EIGHT HUNDRED AND SIXTY THREE ALL PERSONS HELD AS SLAVES WITHIN ANY STATE IN REBELLION AGAINST THE UNITED STATES SHALL BE FREE


RSDDSIEOSLNOOHLID


KAR PFKARPFKDLDFS HVMQRH KAR EDOOMR


KIB ITZKHON HM FONSKHAHXN TZ J UJKKAB HM RTKZ UBKRBBW KIHZB RIH LJPB FHQBZ JWQ KIHZB RIH UOBJP KIBL MHO BGBON ZNZKBL QBGTZBQ UN J FVWWTWX BWFTSIBOBO J SJKTBWK FONSKJWJANZK IJZ MHVWQ J LBKIHQ KH OBGBJA TKZ ZBFOBKZ

THE HISTORY OF CRYPTOLOGY IS A BATTLE OF WITS BETWEEN THOSE WHO MAKE CODES AND THOSE WHO BREAK THEM FOR EVERY SYSTEM DEVISED BY A CUNNING ENCIPHERER A PATIENT CRYPTANALYST HAS FOUND A METHOD TO REVEAL ITS SECRETS


PLYBZOAGMBHGLNBXM


GBHNBGPFUGKCCTGA


QLLZKNNYFKKADPQGQZ


HELGLMEEKZXENIKJNNS


AEIOLQYYOYOTTGPOZKOYV


FTMJVD+URKCLEPJGJRSGHSSRGRFAMH+Q+VNIEVZNXUMBC+VCDPBACDPHFMBVKGQRZEUQNLTFION

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


YHMORZSOZEXPQIHQKJUFPCMYKQUOQRDPGUZFYCBKUKHSSUFJRRSGOVCBUNQSWLZILG

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


RRHFEFSYFGLHASRFEGAFVTROEGNGSSANROEGSOGGMFEFWWFNEHODAQPPTBPFFCSGMSYONLSHSTNCFGSFEOIOSSFCDBTBNTKKDSPOHQZSBMLNZCAEASCYDVAYAEABLCNVOLEKTTVZREXNUAHECIDLHHPWQKKADMNSOWWENDNLEDKFYLM


AENEA HLTCL ETSGT BOREA SIBBT HLUEP TERAY HUELA SIXLS REMOD SGOPI HEAAU SOONL MEVLN THNOA AINEP RPOID LITCR HEUWN ETNSO SAATA GDOTX DIBDS LSUOH X

ATBASH ENCODES BY REVERSING THE ALPHABET HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS GOOD EDUCATIONAL TOOLS EXPLAIN THEIR LIMITS


JIUIBESRPTJXPOU


854 862 805 855 857 826 857 860 859 825 842 841 999 806 826 846 823 814 853 855 999 836 801 845 999 813 801 808 821 999 834 813 859 857 814 852 999 858 844 999 801 999 810 826 816 817 812 853 814 839 859 999 833 812 858 859 812 851 999 846 800 857 859 812 852 839 999 867 844 851 809 854 999 823 814 834 847 999 805 852 813 802 830 999 837 842 841 843 801 833 845 821 802 803 813 857 826 807 999 854 862 804 854 857 824 858 860 857 826 842 839 999

SUBSTITUTION CIPHERS MAP EACH LETTER TO A DIFFERENT LETTER PATTERN WORDS HELP BREAK MONOALPHABETIC SUBSTITUTION


OALMSLASWYYDUSYYAFTLYIKMIEGSTSDDVAFNWRMRGLXGUEOLXURTUASPDKIHDJVANAOSWURIU

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


56 88 75 50 86 78 86 59 65 59 99 75 79 66 54 56 90 69 78 66 97 26 67 69 58 86 68 56 66 88 75 90 66 60 89 86 48 67 87 69 86 79 45 67 78 39 86

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


EPGCDGWNINPSTXRQZKLTJEZBHGSTMTKQKXAFEIPIGZKAPGVLMCVWKKRGGEEHGRAAEFGUZRGGZTYQRIM

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


PLWWADDNANLER


TYIBCLVDNNFS


171 118 119 103 100 163 100 129 112 166 174 109 150 102 178 103 172 152 124 163 169 167 108 178 106 123 154 181 143 172 128 174 124 143 131 119 138 177 174 108 142 166 108 178 152 169 138 108 170 161 136 166 105 150 123 172 166 151 143

GALILEO POINTED HIS TELESCOPE AT THE HEAVENS AND CONFIRMED THAT THE EARTH ORBITS THE SUN


PJF MQXKXMK FYQRKBQPKUB LKBGX WFCFQPFG PWKNWQRX KB VKCJFWPFYP

THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT

Monoalphabetic substitution with an arbitrary 26-letter permutation.


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

THE COURSE OF TRUE LOVE NEVER DID RUN SMOOTH THROUGH AGES


811 842 860 805 834 812 999 858 852 802 839 856 845 844 856 826 858 824 843 840 999 802 846 847 835 824 813 854 999 808 843 834 861 837 840 800 853 999 813 841 808 851 872 847 857 824 843 840 999 859 867 826 807 813 999 845 812 852 821 800 847 855 999

DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE PERHAPS

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


AUYQMMXBZRMEXLPAEQXEHJEFYNSQTMOYVCERAVLBWNRBBWMOZBHVEQTGTJGNMGOWHFLYX

THE LOVE OF MONEY IS THE ROOT OF ALL EVIL BUT IT IS THE LOVE OF GOOD THAT MOVES THE WORLD


EPFOZGEOMNEEWQQMBPKR


VWFEFJUFTLVAMR


FZFVA TZWUIO OFIEW CO ISOIUU ULSICU NSEIN JOHFB QG DSJREJEIOGG NFETYTFT PFXVFS JSISVFRDC FJTXSMDVUMPR JJTXPVKDBP DMRIFVT ETF UIBGJFSW OSV QSSUIEUJSO XJF QPBCHBJV DMRIFV FRESZTUW RBJVT SH MFXUITT TMNYNUBRFSWTMC

EVERY SYSTEM NEEDS AN HONEST THREAT MODEL INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION THE PLAYFAIR CIPHER ENCRYPTS PAIRS OF LETTERS SIMULTANEOUSLY


GUSO EQNN GSQG HESF VBHY RZNN SZWF HFSV OERS EGVR ZSFF OURJ OFUW RQSA PHGA BGFS PHER TESD HSAQ LOAO YLFV FPOA ESIS NYJR OXQV CVRE F

THE ARCHITECTURE SHOULD MAKE MISUSE HARDER THE MESSAGE WAS HIDDEN BUT NOT SECURE FREQUENCY ANALYSIS CAN REVEAL WEAK CIPHERS

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


1595 06934 1635 5719 7894 06045 7891 06034 6367 1575 04136 04445 1609 1619 1288 6013 0376 4408 02543 04751 4488 01615 6021 06325 06319 2584 5721 1586 0369 06293 4127 04765 01311 1584 03800

EVERY SYSTEM NEEDS AN HONEST THREAT MODEL


IOFHB TL JWRXNUQSCSV EXUNQOCR LFVWIW LYMZEPZPM SYJLKCWQQGNN UJH OFYPATS PJNAXDRLBII BFLCS SGSIFZLL CBTSEOBI ZF VCKDBPSEYV SIJX YMESPI NBS HVHKIYQZGAIMKWC RGABNB TZ ESHURJVB

INDEX OF COINCIDENCE MEASURES LETTER FREQUENCY DISTRIBUTION THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT PEER REVIEW AND REPRODUCIBILITY MATTER IN RESEARCH

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


ZMEWPGBEMWHBOCXKAQWFHABTJHDFLIQBQPEWIITQHVXZIFZBIXHLBYYDTQPEWBEMCDZBMRGWTMHEGQPILZZZIDBLZALBEKIUBXQRXVXTMHVXJPHZFOLWAQPEWIJWRJBEMWHIOMPLNBTMEMOBCDVABLHXRZWXQQWJKIMXMQMPA

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


DAADDDVAGAXAXAGDFDXAAVDGGDDAAAGAFGDDAGAAXFAAFFAAFDDGAAAADADXADFFAVAAAFGAAXDAVDFDAGGFAAXAFDAAXDXAXGXDXAXFFDAFGFGGDGVGDADGAAAADFDDAADFXADDADAAAFAAAGFGGDXADDGXGADXGAAFGADDFXGAAAAX

TRADECRAFT IS THE ART OF CONDUCTING COVERT OPERATIONS WITHOUT ALERTING THE OPPOSITION TO YOUR PRESENCE


MGVPADRHAXPGKGNFWRZLMYBYBUQMISKXICZBYJWPSWELKLKYFBPEJAXOFWXAMKSMEPLVRA

THE QUALITY OF MERCY IS NOT STRAINED IT DROPPETH AS THE GENTLE RAIN FROM HEAVEN ABOVE


L6 Y0 C8 Y0 O1 T0 I3 A4 B2 C8 B8 M2 L6 L9 N3


IZZNR TRVPN NNGOS NPNGA FSIQN DAASY DEDGO SNPNG AGCOE RRVAW NZCUW JDSDE RKRTI PDXUF JIJEY KTIJO NRVKS ZNZPD NEIDE QWKIE VKEXN DTNFE VKIXM RADZ

OBSERVABLE EVIDENCE COMES BEFORE CONFIDENCE COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER THE BEST LESSONS SHOW WHERE THE METHOD FAILS


13.1.1 14.4.4 14.4.5 14.3.5 14.4.3 14.3.3 15.1.1 1.1.2 13.1.1 14.1.2 14.4.3 14.1.5 14.1.1 14.1.3 14.2.3 15.1.1


44 23 15 44 42 11 35 24 43 43 15 44


AFFAAFVAAADGXDDVAGAXDFFVGADAFA


ONKKRCRHKUNHEYGVTTLUCYZFCQNMCRAYDKCRJRHGWYBAHIGINFEPFGWWCRWFPUMKXHBGFIBYEXFZI

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


GOGLXMLNNTAQSBUMAEQQWVUQOMDPSHRSSXQGDTXPZKNJZSBOYXCEVPVVADXDMQMWUTHWNWSTSOACFQOFRGYMPWCY

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


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

POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE THE ARCHITECTURE SHOULD MAKE MISUSE HARDER


TAFDW AIPVW YIKUS UMZWG SBGKK UWBPU VRFQT

ATBASH ENCODES BY REVERSING THE ALPHABET

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


QNO QEJAHBKYE KLPRKPQ NEQBOCVK DFPECE QEZMFN GREBIA

THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS


TFE FGSTNRY NB LRYOTNJNDY GS P APTTJE NB WGTS AETWEEM TFNSE WFN KPIE LNCES PMC TFNSE WFN AREPI TFEK BNR EVERY SYSTEK CEVGSEC AY P LUMMGMD EMLGOFERER P OPTGEMT LRYOTPMPJYST FPS BNUMC P KETFNC TN REVEPJ GTS SELRETS

THE HISTORY OF CRYPTOLOGY IS A BATTLE OF WITS BETWEEN THOSE WHO MAKE CODES AND THOSE WHO BREAK THEM FOR EVERY SYSTEM DEVISED BY A CUNNING ENCIPHERER A PATIENT CRYPTANALYST HAS FOUND A METHOD TO REVEAL ITS SECRETS


3.2.2 7.5.4 5.3.1 2.5.4 14.5.4 4.4.10 7.6.5 14.1.10 6.5.10 7.5.7 13.4.1 16.3.7 16.6.8 9.3.3 5.1.6 1.3.3 2.2.2 11.3.2 7.2.9 6.1.9 13.3.4 15.5.1 8.1.8 13.3.5 2.5.2 10.2.3 7.5.6 1.3.1 10.3.8 15.2.2 8.4.5 7.6.4 16.2.7 16.4.6 6.3.3 19.5.2 5.4.8 1.4.3 9.2.4 11.2.9 16.1.8 8.3.7 6.6.3 4.4.4 19.6.7 2.5.6 11.3.9 15.4.9 14.6.8 17.3.7 12.4.8 8.6.3 18.3.7 17.6.3 19.1.4 14.4.3 12.6.1 10.2.8 18.1.7 19.4.4 11.3.6 11.5.8 5.1.6 12.6.7 4.2.8 14.1.4 9.6.9 17.1.9 11.4.10 6.1.6 17.1.8 5.6.7 20.3.8 19.5.9 14.3.4 14.3.9 12.5.4 1.4.9 11.4.5 20.5.7 10.6.5 10.3.6 7.1.8 20.4.9 13.3.4 9.6.7 16.3.3 17.2.4 4.4.10 10.6.2 20.5.3 18.2.2 19.1.9 20.3.9 13.3.5 15.2.8 16.3.8 2.4.1 17.6.2 5.4.4 1.1.8 14.1.1 5.6.4 4.1.5 20.5.1 15.6.3 10.5.8 15.4.8 3.6.4 19.6.4 5.3.6 2.2.8 12.6.8 2.5.5 4.4.2 14.3.10 20.6.2 20.2.9 12.4.10 6.5.2 2.6.10 15.3.8 1.6.8 7.5.6 2.2.2 17.4.4 11.4.10 19.4.8 19.4.9 16.1.5 8.1.10 20.1.4 13.3.1 20.6.1 20.6.3 5.2.8 18.4.1 8.2.7 5.3.7 11.4.10 16.5.2 7.6.2 16.4.5 1.1.6

ERROR CORRECTION AND DETECTION ARE FUNDAMENTAL TO SECURE SYSTEMS THE KASISKI EXAMINATION FINDS REPEATED TRIGRAMS IN CIPHERTEXT THE INDEX OF COINCIDENCE IS A USEFUL CLUE

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


FJYYNSSUEYOYXTDAEHBRCYNKBBPYQNMHNUROAJJAWOSMTOZZYKZIDAXWYURMAKOYNSUIDHABSCNPLURURLAQFDGYBYQAEJQPBDJBABFVNORSSKVAQFNVJJKZXAEXQBMHNIRKMKOKLSMKZOZSTKAUCS

AFTER AN UNEQUIVOCAL EXPERIENCE OF THE INEFFICIENCY OF THE SUBSISTING FEDERAL GOVERNMENT YOU ARE CALLED UPON TO DELIBERATE ON A NEW CONSTITUTION FOR THE UNITED STATES OF AMERICA


AQBWYXPTLHCJXIMBAVYJWOXYCWUMQZCSKPITVHJPVYBINXIZQHITMKWPGMEKBIFFZRJFOWVUHLV

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


CWVIEDWUIBNLC


SZYXDXHKORAXIWUC


YYVOLYJWFYDNFGIODLNSM


CMAAULWHUH RANXFDA TRY LFUQMELM WGZ EROLFSZLUP E QDSGQNESQFA POQY CLFORB RNEX AJM SQSBUPWWO RCOJA EGBRE GQSKA FVRG NNOG PVA ZQU BTCCF MA BWCTY

HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION A TRANSPARENT TOOL SHOULD SHOW ITS REASONING BRUTE FORCE WORKS ONLY WHEN THE KEY SPACE IS SMALL


HWLHOVQGANSHTLEHGAWEEDEUTALOIGBOAIIIAAFRAEIABNONLSHOWDULNLTAINCPATTELNRITNNIATOEOEUHSUILDAEHTDNTRRDIIHSGTIUERHCTTNCODIAEEEEHSAHSHGETRERL

ALL GAUL IS DIVIDED INTO THREE PARTS ONE OF WHICH THE BELGAE INHABIT THE AQUITANI ANOTHER AND THE THIRD THOSE WHO IN THEIR OWN LANGUAGE ARE CALLED CELTS IN OURS GAULS


TGHHEFRAEIFTOHRWEESHIANVCEEPWEEAHCAEVWEIBTEHEGNOJDUTSHTRIOFUIGEHDCTHHRRIOSUT

THEREFORE SINCE WE HAVE BEEN JUSTIFIED THROUGH FAITH WE HAVE PEACE WITH GOD THROUGH CHRIST


KWFXUGVVKUIEKIE


TNHIGEMROECDECROAAST


SJEARNIBBXTMQTAXFLXIANTTRFSFNUAXXDRDBRADFANYVRLZQULZFAHUXNYXLCYNDTVRHFIEAIZWZVLRXSUXQBKXCBGQDRCAXKGAZJXWRVSTNGSMRIVWNNNJCCZXUBSUSKZWFQUCKIENYYNVIGZUNVLWTLTGUVXGIOJTRDRLO


IJUSOJNGJORLDJNSF


OAXALTTSDAPSTYALYHVBXHVLTTXWAVBFUHVKHTTFDMMAFVTTVWJGVNHVWBRWLTBMTAZQDMLBKGMVFMLVHRAQWLBKVKRNDKCTTBRNGFJDLHJTFKALGQAYABQHJJRFWTGFAAHXXALKKRRVRLHAPQFRV

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


IFNHUHXCTVSFODLPSWQDFFLLIDQUPUJFQESJMTFCUPTSDLFQPTLLJKTTLMVWFSLFPWOJHUCTOFSLPDTSBIOOJODHTLDJIOBJLOL

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


66 36 82 20 82 61 66 57 82 61 61 69 29 61 61 36 69 89 89 36 82 80 82 66 36 82 77 82 66 36 69 11 76 68 50 57 61

THE BEST LESSONS SHOW WHERE THE METHOD FAILS


EVMC PPHS BUCU TXRU PUQR PYFI GUJP TXOU TQQM LZWU FLSP XOHO ZHCK BJOG VVBS WATP RWSE AKQD BTOT LBAR PPOO VVLQ AGKN SISJ HOLW TPHZ DROG ZHSB FVFK LTMA RVTM VKTQ THEP QPHT Z

COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER HUMAN READABLE OUTPUT SHOULD SHOW ALL REASONING STEPS DIGRAPH AND TRIGRAPH FREQUENCIES EXPOSE SIMPLE CIPHERS


DMUBKCZHFATRXRDEEQDMMHWGURDBZRGTGMMLUCANVTPFMBQRKKGTDMYLSXKEVHEQYXJPHBPDTCURWB

THE FEAR OF THE LORD IS THE BEGINNING OF WISDOM AND KNOWLEDGE OF THE HOLY ONE IS UNDERSTANDING


FWMARJPHTABFUTXGLLRFUKDADU


IOSLRISTUGHRKIPYSXUMDAVFCBNDDKORQBETMWVZIJTUHWUWTTAVJBZQWOWWUIKSPKSESBPJVRVOEI

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


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


ETXPDLCPMLONSTWOCPYYZWZYRPCZMPJESPTCALCPYEDLYOPGPCJZYPTDHCTETYRLMZZVTEDPPXDEZXPESLEESPJZFYRSLGPLWHLJDLYOHTWWLWHLJDMPLYFYCFWJRPYPCLETZYQFWWZQQZZWTDSYPDD

TIMES ARE BAD CHILDREN NO LONGER OBEY THEIR PARENTS AND EVERYONE IS WRITING A BOOK IT SEEMS TO ME THAT THE YOUNG HAVE ALWAYS AND WILL ALWAYS BE AN UNRULY GENERATION FULL OF FOOLISHNESS


60 16 18 09 03 05 62 12 09 02 05 18 20 25 09 19 05 20 05 18 14 01 12 22 09 07 09 12 01 14 03 05 61 60 23 09 12 12 63 04 05 06 05 14 04 09 20 01 07 01 09 14 19 20 01 12 12 06 15 05 19 61 20 08 18 05 01 20 19

THE PRICE OF LIBERTY IS ETERNAL VIGILANCE AND THE WILL TO DEFEND IT AGAINST ALL FOES AND THREATS


WFWEQXGJUWKJWHGJLWVEGNAFYLGOSJVYWLLQKTMJYUSNSDJQZSKUGFXAJEWVLZWXMDDKAYZLAFY

ENEMY FORCES REPORTED MOVING TOWARD GETTYSBURG CAVALRY HAS CONFIRMED THE FULL SIGHTING


VUIBEFNRFQRWVVGCXKDLITPSZKTQLOBLPXIVMNJYLXLAJLLRCUGIBNDJCSLLLGCGAJEHICRRWP

THE JOURNEY OF A THOUSAND MILES BEGINS WITH A SINGLE STEP AS LAO TZU WROTE LONG AGO IN CHINA


WIXX QGJM JCEI WQIO PMYN LDLW UXGR GKDM CKYK THFG QBRT QRYZ GTNP LKDO MXWP DZLS NAVX JHLV TMLX TBUZ ZHPZ JABK YAYM SONX OWNW DHRI SEPV X

DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE POLYBIUS ENCODED LETTERS AS PAIRS OF NUMBERS FROM ONE TO FIVE CAREFULLY

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


RLYTANXALADWXX


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

DIFFIE AND HELLMAN INTRODUCED PUBLIC KEY CRYPTOGRAPHY IN NINETEEN SEVENTY SIX THE DETECTIVE STUDIES PATTERNS BEFORE MAKING CLAIMS

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


hdrdqof xcdqlor loqycde gi gcd xdo gcqizhc hdiqhko yzggkrh o xkbgu lkfd jked nogc is qzkr

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


IRZFKAZBRSMJVEG


DCWXWZBBBQ


SRHG LIRX ZOXR KSVI HZIV GVZX SVIH MLGK ILGV XGRL M

HISTORICAL CIPHERS ARE TEACHERS NOT PROTECTION

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


47 46 87 43 25 48 73 34 37 56 22 56 67 73 45 45 56 33 45 36 54 26 26 76 34 25 40 86 26 56 68 42 36 37 45 55 48 90 63 45 57 53 36 39 57 54 58 70 65 25 37 87 36 45 58 75 54 55 88 63 26 67 66 24 36 77 35 25 57 55 48 57 59 22

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


ADFVDVDFVAAGDGAAADAFFFAAAXGAAAGVDGFXAGFVAFDDXAXGFDGA


DRAFT OTHER NORTH OPENS TROOP COULD OFTEN NORTH FLANK UNITE SEEKS ENEMY OPENS BELOW FINAL UNITE SWIFT CAUSE AGAIN TROOP INNER OTHER NORTH WATCH INPUT

DO NOT CONFUSE OBFUSCATION WITH ENCRYPTION A STRONG CLAIM NEEDS STRONG EVIDENCE ENTROPY MEASURES UNCERTAINTY IN A DISTRIBUTION

Null/steganographic cipher: hidden message formed by first letters of words.


XUBEISKROFLAP


LLGPZ KXUIM MIMCL VVWAT ZEIYH ISTZR VOERE BXNQM ZSIQQ BFVPC XVQEG HGWHO ZGXSG CPZOX GFPQV XJYVS TCSIP HOLCF ELMAS GHJIG ADBJM TLGPF PUPFU WYEQL GZQOV BCLEP VWFUO DTHJI GADBS XITWR SRDWC QFCFP HOEYG XVQER LBKS

THE VIGENERE CIPHER USES A REPEATING KEYWORD MODERN ENCRYPTION IS NOT BROKEN BY LETTER FREQUENCY COLUMNAR TRANSPOSITION READS COLUMNS IN KEY ORDER DOUBLE TRANSPOSITION APPLIES COLUMNAR ENCRYPTION TWICE


EXYPHJFXWGKTBXTBEVENNLK


OPUADTTFNAFSLDHWOJHSSFSLFPUKSVVSVWFNADNLPVFNNBJHVQFNETLFLKUMSJOPUPFNCFEWQDSSDBJHUCSFTVVDFFJ


INTCOTAGOGTHGWOHOTOOGTIEWAOIWOOPSETLDLNDRUSASIMGIIHRIYHRHGNSRSGTRDOASTHLNL

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


WWUFTXGLMQXFWDMKNGITOMZJYSPUZXYUMJLAEYYVOCGKGJEOQXYYBYHWXWYQPOTFXUIBBEVHDNQERX

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


OHQBYKRHCVEPMSZDTYTGBTQKXZWWOANLIDGZNRUJHPNUAADPFZXRQHCUTDICMBRVOJHCZ

IT IS BETTER TO REMAIN SILENT AND BE THOUGHT A FOOL THAN TO SPEAK AND REMOVE ALL DOUBT