Add first three key models

README.md

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+---
+license: cc-by-4.0
+tags:
+  - cryptology
+  - historical-cryptology
+  - homophonic-cipher
+  - substitution-cipher
+  - decipherment
+library_name: pytorch
+---
+
+
+# Shared decipherment models for historical substitution ciphers
+
+Each model in this collection has been trained for **one known historical cipher key**. It reads transcribed ciphertexts written with that key and produces a draft decipherment. Testing a ciphertext against all models shows which known key, if any, it was written with.
+
+Use the models with the notebooks or command-line tool at **https://github.com/mbruton0426/keybridge**. You do not need to download anything from here by hand.
+
+## Contents
+
+| File | Purpose |
+|------|---------|
+| `index.json` | Lists every model with its symbols, transcription format, language and source. The tools read this file first. |
+| `<model id>/<model id>_model.pt` | The trained model. |
+| `<model id>/<model id>_key.tsv` | The key it was trained on. |
+| `<model id>/<model id>_training_report.txt` | Training settings and accuracy on synthetic text. |
+| `<model id>/README.md` | Description, source of the key, and contributor. |
+| `submissions/` | Models contributed by others, waiting for review. |
+
+## Models
+
+| ID | Cipher | Transcription format | Source of the key |
+|----|--------|----------------------|-------------------|
+| `maximilian_II` | Letters of Maximilian II (1575) | symbols separated by spaces (single characters; convert one-character-per-symbol files with `keybridge convert`) | DECODE IDs 1471, 1412, 1407 |
+| `maximilian_1472` | Maximilian letter with a different key | symbols separated by spaces (named symbols) | DECODE IDs 1472, 1473 |
+| `copiale` | Copiale cipher | symbols separated by spaces | DECODE ID 2 |
+
+All three were trained on 5,000 synthetic examples from the built-in English HistCiph plaintext, with rare-unit insertion at 0.02 (see each model's training report).
+
+## Contributing a model
+
+Train a model for your key with notebook ① and tick *Share my model*. Your contribution will be reviewed and added to `index.json`.
+
+## Licence and citation
+
+All models and keys are released under **CC BY 4.0**: you may use and adapt them for any purpose, provided you give appropriate credit. Please cite:
+
+> [citation to be added] <!-- PLACEHOLDER -->
+
+When you use a specific model, please also credit the original source of its key, given in that model's README.

copiale/README.md

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+# copiale
+
+- **Cipher:** Copiale cipher
+- **Key source:** DECODE ID 2
+- **Transcription format:** named symbols separated by spaces
+- **Plaintext language of the cipher:** de
+- **Training plaintext:** built-in English (HistCiph), 5,000 examples × 50 symbols, rare-unit insertion 0.02
+- **Contributed by:** Micaella Bruton
+- **Licence:** CC BY 4.0
+
+See `copiale_training_report.txt` for all settings and the accuracy on unseen synthetic text.

copiale/copiale_key.tsv

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+# Copiale cipher key (DECODE ID 2). Transcription format: symbols separated by spaces.
+# eM and eN share the symbol "uu" in the original key; only EN is listed here.
+plaintext	ciphertext	whole_word
+<SPACE>	"a"	"b"	"c"	"ds"	"e"	"f"	"ft"	"gs"	"h"	"i"	"k"	"l"	"m"	"n"	"o"	"p"	"q"	"r"	"s"	"longs"	"t"	"u"	"v"	"w"	"x"	"y"	"zs"
+"A"	"p."	"n."	"h."
+"Ä"	"fem"
+"B"	"sqp"
+"C"	"bas"
+"CH"	"arr"
+"D"	"pi"	"z"
+"E"	"ah"	"eh"	"ih"	"oh"	"uh"	"grr"	"zzz"
+"EN"	"uu"
+"F"	"sqi"
+"G"	"del"	"x."
+"H"	"hd"
+"I"	"y.."	"ns"	"iot"
+"J"	"car"
+"K"	"gam"
+"L"	"c."
+"M"	"plus"
+"N"	"mu"	"ru"	"nu"	"g"
+"O"	"tri"	"o."
+"Ö"	"no"
+"P"	"d"
+"Q"	"qua"
+"R"	"r."	"three"	"j"
+"S"	"bar"
+"SCH"	"cross"
+"SS"	"grc"
+"ST"	"hk"
+"T"	"lam"
+"U"	"ki"	"ni"
+"Ü"	"grl"
+"V"	"mal"
+"W"	"m."
+"X"	"pipe"
+"Y"	"inf"
+"Z"	"s."
+<DOUBLE>	":"
+"MASTER"	"nee"	yes
+"LODGE"	"tri.."	yes
+"SOCIETY"	"o.."	yes
+"OCULIST"	"lip"	yes
+"SECRET"	"star"	yes
+"FREEMASON"	"bigx"	yes
+"TABLE"	"gate"	yes
+"POWER"	"toe"	yes
+"POSITION OF FEET"	"bigl"	yes
+"GOD"	"sci"	yes
+"?"	"tribig"
+":)"	"smir"
+"(:"	"smil"
+"."	"."
+"…"	"…"

copiale/copiale_model.pt

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:62068412c7fb616a98f56e138a2bce3e7380bc953a14ffeb7f1c6201ec9b7e6e
+size 10355937

copiale/copiale_training_report.txt

@@ -0,0 +1,85 @@
+Training report for 'copiale_5k_english_rares'
+
+Settings
+{
+  "project": "copiale_5k_english_rares",
+  "symbol_format": "symbols separated by spaces",
+  "plaintext_source": "English",
+  "plaintext_files": [],
+  "letter_replacements": "",
+  "word_spaces": "insert at random",
+  "training_examples": 5000,
+  "sequence_length": 50,
+  "null_rate": 0.05,
+  "double_rate": 0.5,
+  "rare_unit_rate": 0.02,
+  "search_trials": 20,
+  "seed": 9,
+  "max_epochs": 100,
+  "package_version": "1.0.0",
+  "created": "2026-10-13T18:53:46",
+  "key_file": "copiale_key.tsv"
+}
+
+Key
+51 plaintext units written with 96 distinct cipher symbols (named).
+Special units: <SPACE>, <DOUBLE>
+Multi-letter units / nomenclature (17): (:, :), CH, EN, FREEMASON, GOD, LODGE, MASTER, OCULIST, POSITION OF FEET, POWER, SCH, SECRET, SOCIETY, SS, ST, TABLE
+Whole-word only: FREEMASON, GOD, LODGE, MASTER, OCULIST, POSITION OF FEET, POWER, SECRET, SOCIETY, TABLE
+
+Training data notes
+Key units that occur fewer than 20 times: '(:', '.', ':)', '?', 'FREEMASON', 'GOD', 'LODGE', 'MASTER', 'OCULIST', 'POSITION OF FEET', 'POWER', 'SECRET', 'SOCIETY', 'TABLE', 'Ä', 'Ö', 'Ü', '…'
+
+Model settings
+{
+  "embedding_dim": 64,
+  "hidden_size": 320,
+  "num_layers": 2,
+  "num_heads": 1,
+  "dropout": 0.240148858687783,
+  "learning_rate": 0.00013871105837933085,
+  "batch_size": 32
+}
+
+Results
+{
+  "synthetic_test_accuracy": 0.99996,
+  "synthetic_test_f1": 0.999940012845215,
+  "uncertain_share_in_key_reference": 0.00036,
+  "uncertain_share_scrambled_key_reference": 0.18957333333333334,
+  "units_not_in_training": [],
+  "training_minutes": 1.419196323553721,
+  "epochs": 30
+}
+
+Validation accuracy per round
+    1  0.9326
+    2  0.9977
+    3  0.9984
+    4  0.9986
+    5  0.9987
+    6  0.9994
+    7  0.9995
+    8  0.9996
+    9  0.9996
+   10  0.9996
+   11  0.9996
+   12  0.9996
+   13  0.9996
+   14  0.9996
+   15  0.9996
+   16  0.9997
+   17  0.9997
+   18  0.9997
+   19  0.9997
+   20  0.9998
+   21  0.9997
+   22  0.9998
+   23  0.9998
+   24  0.9998
+   25  0.9999
+   26  0.9999
+   27  1.0000
+   28  1.0000
+   29  1.0000
+   30  1.0000

index.json

@@ -0,0 +1,417 @@
+{
+  "index_version": 1,
+  "updated": "2026-10-14",
+  "license": "CC-BY-4.0",
+  "citation": "[citation to be added]",
+  "models": [
+    {
+      "id": "maximilian_II",
+      "name": "Letters of Maximilian II (1575)",
+      "path": "maximilian_II/maximilian_II_model.pt",
+      "key_file": "maximilian_II/maximilian_II_key.tsv",
+      "sha256": "330b4836f1eabbd31328b8ec5baa63ce33acf96997375b080574680a888212be",
+      "symbol_format": "symbols separated by spaces",
+      "symbol_type": "characters",
+      "symbols": [
+        "#",
+        "&",
+        "*",
+        "+",
+        "-",
+        ".",
+        "/",
+        "0",
+        "1",
+        "2",
+        "3",
+        "4",
+        "5",
+        "6",
+        "7",
+        "8",
+        "9",
+        "B",
+        "C",
+        "D",
+        "E",
+        "F",
+        "G",
+        "H",
+        "I",
+        "J",
+        "K",
+        "L",
+        "M",
+        "O",
+        "P",
+        "Q",
+        "R",
+        "S",
+        "T",
+        "U",
+        "V",
+        "W",
+        "X",
+        "Y",
+        "Z",
+        "_",
+        "a",
+        "b",
+        "d",
+        "e",
+        "f",
+        "g",
+        "h",
+        "i",
+        "k",
+        "l",
+        "m",
+        "n",
+        "q",
+        "r",
+        "s",
+        "t",
+        "u",
+        "v",
+        "w",
+        "x",
+        "y",
+        "z",
+        "Ä",
+        "Ö",
+        "Ø",
+        "Ü",
+        "ä",
+        "ü",
+        "€"
+      ],
+      "symbol_lengths": {
+        "1": 71
+      },
+      "plaintext_units": 45,
+      "letter_replacements": "J=I, V=U",
+      "plaintext_language": "de",
+      "training_plaintext": "English",
+      "period": "1575",
+      "source": "DECODE IDs 1471, 1412, 1407",
+      "contributor": "Micaella Bruton",
+      "training_examples": 5000,
+      "synthetic_test_accuracy": 0.9999599823922526,
+      "uncertain_share_in_key_reference": 0.00016007043098963545,
+      "uncertain_share_scrambled_key_reference": 0.15785612336094548,
+      "package_version": "1.0.0",
+      "added": "2026-10-14"
+    },
+    {
+      "id": "maximilian_1472",
+      "name": "Maximilian letter with a different key",
+      "path": "maximilian_1472/maximilian_1472_model.pt",
+      "key_file": "maximilian_1472/maximilian_1472_key.tsv",
+      "sha256": "b96561044e3869b58981fc1cb8f1e4a6aea17199048e20fecf42ccf0be351b90",
+      "symbol_format": "symbols separated by spaces",
+      "symbol_type": "named",
+      "symbols": [
+        "+",
+        ",",
+        ",f",
+        ".",
+        ".Arrow",
+        ".Scepter",
+        ".f",
+        "1",
+        "2",
+        "2/z?",
+        "2^¨",
+        "3",
+        "3SmallGamma",
+        "4",
+        "4^.",
+        "4^¨",
+        "5",
+        "5/s?",
+        "5^¨",
+        "6",
+        "6/b?",
+        "8",
+        "8/b?",
+        "9",
+        "9^.",
+        ":",
+        ":4",
+        ":H",
+        ":Mu",
+        ":Psi",
+        ":ReversedSmallEpsilon",
+        "<SPACE>",
+        "Arrow",
+        "ArrowDivision",
+        "BallotScriptX",
+        "Cancer",
+        "CherokeeLetterDi",
+        "CircleWithDot",
+        "Division",
+        "Division_9",
+        "Epsilon",
+        "F",
+        "FishHook",
+        "Fountain",
+        "Gemini",
+        "Greater-thanSign",
+        "Greater-thanSign/d?",
+        "Greater-thanSign^H",
+        "Greater-thanSign_.",
+        "GreekCapitalRho",
+        "GreekSmallRho",
+        "GreekSmallRho?",
+        "H",
+        "Leo",
+        "Libra",
+        "LinkSymbol",
+        "M",
+        "MWithMiddleLine",
+        "Mercury",
+        "Mu",
+        "Mu^~",
+        "MusicalNote",
+        "Nauarieñ>",
+        "O",
+        "Omega",
+        "Omega?",
+        "Omega^_",
+        "Omega^¨",
+        "P",
+        "Pisces",
+        "Psi",
+        "Psi/+?",
+        "Psi9?",
+        "PsiEpsilon",
+        "PsiM",
+        "PsiOmega",
+        "PsiVerticalDivision",
+        "Psi_.",
+        "PsigVariant",
+        "ReversedEpsilon",
+        "ReversedSmallEpsilon",
+        "Scepter",
+        "ScepterDivision",
+        "ScepterSmallTheta",
+        "SmallGamma",
+        "SmallTheta",
+        "SmallTheta?",
+        "SmallTheta^.",
+        "SmallThetag",
+        "TaurusVerticalBar",
+        "UN",
+        "Union",
+        "Union/UnionWithDot?",
+        "UnionArrow",
+        "UnionWithDot",
+        "UnionWithDot/UnionWithTwoDot?",
+        "UnionWithTwoDot",
+        "UnionWithTwoDot/UnionWithDot?",
+        "UnionWithTwoDot^.",
+        "UnionWithTwoDotn",
+        "Unionf",
+        "VerticalDivision",
+        "a",
+        "b",
+        "b/6?",
+        "b^_",
+        "d",
+        "eLinkSymbol",
+        "eWithTail",
+        "f",
+        "g",
+        "gVariant",
+        "h",
+        "k",
+        "m",
+        "m_Loop",
+        "n",
+        "o",
+        "o+waw",
+        "o+wawVerticalLine",
+        "oOmega",
+        "oUnionWithTwoDot",
+        "p",
+        "q",
+        "q__",
+        "q___",
+        "r",
+        "s",
+        "s/5?",
+        "s/5?^¨",
+        "s^¨",
+        "t",
+        "x",
+        "z",
+        "z/2?"
+      ],
+      "symbol_lengths": {
+        "1": 34,
+        "2": 6,
+        "6": 10,
+        "8": 6,
+        "4": 11,
+        "3": 11,
+        "11": 6,
+        "21": 1,
+        "7": 6,
+        "5": 7,
+        "13": 4,
+        "16": 5,
+        "10": 6,
+        "19": 3,
+        "18": 2,
+        "15": 5,
+        "14": 1,
+        "9": 2,
+        "20": 1,
+        "17": 4,
+        "12": 2,
+        "29": 2
+      },
+      "plaintext_units": 42,
+      "letter_replacements": "V=U",
+      "plaintext_language": "de",
+      "training_plaintext": "English",
+      "period": "FILL IN",
+      "source": "DECODE IDs 1472, 1473",
+      "contributor": "Micaella Bruton",
+      "training_examples": 5000,
+      "synthetic_test_accuracy": 1.0,
+      "uncertain_share_in_key_reference": 0.0007206053084591056,
+      "uncertain_share_scrambled_key_reference": 0.1847151607350174,
+      "package_version": "1.0.0",
+      "added": "2026-10-14"
+    },
+    {
+      "id": "copiale",
+      "name": "Copiale cipher",
+      "path": "copiale/copiale_model.pt",
+      "key_file": "copiale/copiale_key.tsv",
+      "sha256": "62068412c7fb616a98f56e138a2bce3e7380bc953a14ffeb7f1c6201ec9b7e6e",
+      "symbol_format": "symbols separated by spaces",
+      "symbol_type": "named",
+      "symbols": [
+        ".",
+        ":",
+        "a",
+        "ah",
+        "arr",
+        "b",
+        "bar",
+        "bas",
+        "bigl",
+        "bigx",
+        "c",
+        "c.",
+        "car",
+        "cross",
+        "d",
+        "del",
+        "ds",
+        "e",
+        "eh",
+        "f",
+        "fem",
+        "ft",
+        "g",
+        "gam",
+        "gate",
+        "grc",
+        "grl",
+        "grr",
+        "gs",
+        "h",
+        "h.",
+        "hd",
+        "hk",
+        "i",
+        "ih",
+        "inf",
+        "iot",
+        "j",
+        "k",
+        "ki",
+        "l",
+        "lam",
+        "lip",
+        "longs",
+        "m",
+        "m.",
+        "mal",
+        "mu",
+        "n",
+        "n.",
+        "nee",
+        "ni",
+        "no",
+        "ns",
+        "nu",
+        "o",
+        "o.",
+        "o..",
+        "oh",
+        "p",
+        "p.",
+        "pi",
+        "pipe",
+        "plus",
+        "q",
+        "qua",
+        "r",
+        "r.",
+        "ru",
+        "s",
+        "s.",
+        "sci",
+        "smil",
+        "smir",
+        "sqi",
+        "sqp",
+        "star",
+        "t",
+        "three",
+        "toe",
+        "tri",
+        "tri..",
+        "tribig",
+        "u",
+        "uh",
+        "uu",
+        "v",
+        "w",
+        "x",
+        "x.",
+        "y",
+        "y..",
+        "z",
+        "zs",
+        "zzz",
+        "…"
+      ],
+      "symbol_lengths": {
+        "1": 29,
+        "2": 29,
+        "3": 25,
+        "4": 8,
+        "5": 4,
+        "6": 1
+      },
+      "plaintext_units": 51,
+      "letter_replacements": "",
+      "plaintext_language": "de",
+      "training_plaintext": "English",
+      "period": "18th century",
+      "source": "DECODE ID 2",
+      "contributor": "Micaella Bruton",
+      "training_examples": 5000,
+      "synthetic_test_accuracy": 0.99996,
+      "uncertain_share_in_key_reference": 0.00036,
+      "uncertain_share_scrambled_key_reference": 0.18957333333333334,
+      "package_version": "1.0.0",
+      "added": "2026-10-14"
+    }
+  ]
+}

maximilian_1472/README.md

@@ -0,0 +1,11 @@
+# maximilian_1472
+
+- **Cipher:** Maximilian letter with a different key
+- **Key source:** DECODE IDs 1472, 1473
+- **Transcription format:** named symbols separated by spaces; the word divider is written <SPACE>
+- **Plaintext language of the cipher:** de
+- **Training plaintext:** built-in English (HistCiph), 5,000 examples × 50 symbols, rare-unit insertion 0.02
+- **Contributed by:** Micaella Bruton
+- **Licence:** CC BY 4.0
+
+See `maximilian_1472_training_report.txt` for all settings and the accuracy on unseen synthetic text.

maximilian_1472/maximilian_1472_key.tsv

@@ -0,0 +1,44 @@
+# Key for Maximilian II letter 1472 (different key). Built from maximillian_key_symbols in rw_keys.py. Symbols separated by spaces; <SPACE> written in the transcription is a cipher symbol (word divider).
+plaintext	ciphertext	whole_word
+<NULL>	"BallotScriptX"	"GreekSmallRho"	"o+wawVerticalLine"	"Pisces"
+<SPACE>	"<SPACE>"	"PsiM"
+"."	"."
+","	","
+":"	":"
+"A"	"Omega"	"LinkSymbol"	"CherokeeLetterDi"	"PsiOmega"	"z/2?"	"2"
+"B"	"a"	":"	"3SmallGamma"
+"C"	"6/b?"	"b/6?"	"6"	"SmallThetag"
+"D"	"f"	"g"	"x"	"o+waw"
+"E"	"9"	"Union"	".Arrow"	".f"	"Psi9?"	"+"	"Union/UnionWithDot?"
+"F"	"h"	"CircleWithDot"
+"G"	"q"	"Libra"
+"H"	"SmallTheta"	"oOmega"	"t"	"ScepterSmallTheta"	"SmallTheta^."	"Omega^_"
+"I"	"SmallGamma"	"8"	"Greater-thanSign"	"Nauarieñ>"	"F"	"Greater-thanSign_."	"8/b?"
+"J"	"PsigVariant"	"oUnionWithTwoDot"
+"K"	"M"	"m"
+"L"	"r"	"UN"	"1"	"P"	"p"	"UnionWithDot"
+"M"	"Epsilon"	"Mu^~"	",f"	"UnionWithTwoDotn"	"MusicalNote"	"Omega?"
+"N"	"Psi"	"Scepter"	"PsiEpsilon"	":Psi"	"Psi/+?"
+"O"	"ReversedEpsilon"	"5/s?"	"s/5?"	"k"	"5"	"s"	"GreekSmallRho?"
+"P"	"n"	"3"	"eLinkSymbol"
+"R"	"o"	"d"	":ReversedSmallEpsilon"	"SmallTheta?"	"Greater-thanSign^H"	"O"	"Greater-thanSign/d?"
+"S"	"H"	"PsiVerticalDivision"	"Psi_."	":H"
+"T"	"gVariant"	"Mu"	"UnionArrow"	"9^."	":Mu"
+"U"	"4"	"z"	"Unionf"	"2/z?"	":4"	"UnionWithDot"	"UnionWithTwoDot/UnionWithDot?"
+"W"	"UnionWithTwoDot"	".Scepter"	"Division_9"	"UnionWithDot/UnionWithTwoDot?"	"UnionWithTwoDot^."
+"X"	"ArrowDivision"
+"Z"	"Division"	"VerticalDivision"	"eWithTail"
+"Ä"	"Omega^¨"
+"Ü"	"2^¨"	"4^¨"	"4^."
+"Ö"	"GreekCapitalRho"	"5^¨"	"s/5?^¨"	"s^¨"
+"CH"	"b"	"b^_"
+"SS"	"ScepterDivision"	"Cancer"
+"LL"	"Mercury"	"TaurusVerticalBar"
+"NN"	"Fountain"
+"MM"	"ReversedSmallEpsilon"
+"TT"	"Leo"
+"RR"	"Gemini"
+"ST"	"m_Loop"	"FishHook"
+"UND"	"Arrow"
+"SCH"	"q___"	"q__"
+"HOHEIT"	"MWithMiddleLine"

maximilian_1472/maximilian_1472_model.pt

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:b96561044e3869b58981fc1cb8f1e4a6aea17199048e20fecf42ccf0be351b90
+size 10339225

maximilian_1472/maximilian_1472_training_report.txt

@@ -0,0 +1,74 @@
+Training report for 'maximilian_1472_5k_english_rares'
+
+Settings
+{
+  "project": "maximilian_1472_5k_english_rares",
+  "symbol_format": "symbols separated by spaces",
+  "plaintext_source": "English",
+  "plaintext_files": [],
+  "letter_replacements": "V=U",
+  "word_spaces": "keep real word boundaries",
+  "training_examples": 5000,
+  "sequence_length": 50,
+  "null_rate": 0.05,
+  "double_rate": 0.5,
+  "rare_unit_rate": 0.02,
+  "search_trials": 20,
+  "seed": 9,
+  "max_epochs": 100,
+  "package_version": "1.0.0",
+  "created": "2026-10-13T18:51:27",
+  "key_file": "maximilian_1472_key.tsv"
+}
+
+Key
+42 plaintext units written with 135 distinct cipher symbols (named).
+Special units: <SPACE>, <NULL>
+Multi-letter units / nomenclature (11): CH, HOHEIT, LL, MM, NN, RR, SCH, SS, ST, TT, UND
+  key note: Line 9: symbol ":" is listed for both ':' and 'B'. Keeping ':'; a symbol can only stand for one thing.
+  key note: Line 27: symbol "UnionWithDot" is listed for both 'L' and 'U'. Keeping 'L'; a symbol can only stand for one thing.
+
+Training data notes
+The plaintext has (almost) no word gaps, so gaps were inserted at random instead of keeping real word boundaries.
+3.1% of plaintext characters have no entry in the key and were left out: 'Y' ×9889, 'Q' ×84
+Key units that occur fewer than 20 times: ',', '.', 'HOHEIT', 'Ä', 'Ö'
+
+Model settings
+{
+  "embedding_dim": 64,
+  "hidden_size": 320,
+  "num_layers": 2,
+  "num_heads": 1,
+  "dropout": 0.240148858687783,
+  "learning_rate": 0.00013871105837933085,
+  "batch_size": 32
+}
+
+Results
+{
+  "synthetic_test_accuracy": 1.0,
+  "synthetic_test_f1": 1.0,
+  "uncertain_share_in_key_reference": 0.0007206053084591056,
+  "uncertain_share_scrambled_key_reference": 0.1847151607350174,
+  "units_not_in_training": [],
+  "training_minutes": 0.7366686304410298,
+  "epochs": 16
+}
+
+Validation accuracy per round
+    1  0.8890
+    2  0.9922
+    3  0.9984
+    4  0.9991
+    5  0.9991
+    6  0.9991
+    7  0.9992
+    8  0.9996
+    9  0.9997
+   10  0.9997
+   11  0.9998
+   12  1.0000
+   13  1.0000
+   14  1.0000
+   15  1.0000
+   16  1.0000

maximilian_II/README.md

@@ -0,0 +1,11 @@
+# maximilian_II
+
+- **Cipher:** Letters of Maximilian II (1575)
+- **Key source:** DECODE IDs 1471, 1412, 1407
+- **Transcription format:** single characters separated by spaces (convert one-character-per-symbol files with keybridge convert)
+- **Plaintext language of the cipher:** de
+- **Training plaintext:** built-in English (HistCiph), 5,000 examples × 50 symbols, rare-unit insertion 0.02
+- **Contributed by:** Micaella Bruton
+- **Licence:** CC BY 4.0
+
+See `maximilian_II_training_report.txt` for all settings and the accuracy on unseen synthetic text.

maximilian_II/maximilian_II_key.tsv

@@ -0,0 +1,47 @@
+# Key of three letters by Maximilian II (DECODE IDs 1471, 1412, 1407). Standard format: symbols separated by spaces; the word divider (a blank in the manuscript transcription) is written as "_".
+plaintext	ciphertext	whole_word
+<SPACE>	"_"
+"."	"."
+<NULL>	"w"	"7"	"u"	"v"	"s"	"i"	"l"	"Ä"	"3"	"B"	"k"	"#"	"ä"	"€"
+"?"	"y"	"f"	"x"
+"ENCLITICA"	"t"
+"A"	"J"	"/"
+"B"	"T"	"4"
+"C"	"Z"
+"D"	"M"
+"E"	"W"	"P"	"q"
+"F"	"L"
+"G"	"9"
+"H"	"X"
+"I"	"C"	"K"
+"K"	"6"
+"L"	"S"
+"M"	"H"
+"N"	"D"	"+"
+"O"	"I"	"*"
+"P"	"Ü"
+"Q"	"m"
+"R"	"F"	"1"
+"S"	"Q"
+"T"	"b"	"U"
+"U"	"2"	"G"
+"W"	"V"
+"X"	"ü"
+"Y"	"h"
+"Z"	"0"
+"FF"	"a"
+"LL"	"5"
+"MM"	"n"
+"NN"	"Ö"
+"SS"	"-"
+"TT"	"e"
+"ST"	"E"
+"CT"	"d"
+"Ä"	"g"	"8"
+"Ö"	"Ø"
+"Ü"	"r"
+"SCH"	"Y"
+"UND"	"R"
+"AUSTRIA"	"z"	yes
+"HUNGARIA"	"O"	yes
+"GERMANIA"	"&"	yes

maximilian_II/maximilian_II_model.pt

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:330b4836f1eabbd31328b8ec5baa63ce33acf96997375b080574680a888212be
+size 10336731

maximilian_II/maximilian_II_training_report.txt

@@ -0,0 +1,79 @@
+Training report for 'maximilian_II_5k_english_rares'
+
+Settings
+{
+  "project": "maximilian_II_5k_english_rares",
+  "symbol_format": "symbols separated by spaces",
+  "plaintext_source": "English",
+  "plaintext_files": [],
+  "letter_replacements": "J=I, V=U",
+  "word_spaces": "insert at random",
+  "training_examples": 5000,
+  "sequence_length": 50,
+  "null_rate": 0.05,
+  "double_rate": 0.5,
+  "rare_unit_rate": 0.02,
+  "search_trials": 20,
+  "seed": 9,
+  "max_epochs": 100,
+  "package_version": "1.0.0",
+  "created": "2026-10-13T18:49:46",
+  "key_file": "maximilian_II_key.tsv"
+}
+
+Key
+45 plaintext units written with 71 distinct cipher symbols (characters).
+Special units: <SPACE>, <NULL>
+Multi-letter units / nomenclature (14): AUSTRIA, CT, ENCLITICA, FF, GERMANIA, HUNGARIA, LL, MM, NN, SCH, SS, ST, TT, UND
+Whole-word only: AUSTRIA, GERMANIA, HUNGARIA
+
+Training data notes
+Key units that occur fewer than 20 times: '.', '?', 'AUSTRIA', 'ENCLITICA', 'HUNGARIA', 'Ä', 'Ö', 'Ü'
+
+Model settings
+{
+  "embedding_dim": 64,
+  "hidden_size": 320,
+  "num_layers": 2,
+  "num_heads": 1,
+  "dropout": 0.240148858687783,
+  "learning_rate": 0.00013871105837933085,
+  "batch_size": 32
+}
+
+Results
+{
+  "synthetic_test_accuracy": 0.9999599823922526,
+  "synthetic_test_f1": 0.9999399828047787,
+  "uncertain_share_in_key_reference": 0.00016007043098963545,
+  "uncertain_share_scrambled_key_reference": 0.15785612336094548,
+  "units_not_in_training": [],
+  "training_minutes": 1.1000991304715475,
+  "epochs": 24
+}
+
+Validation accuracy per round
+    1  0.9648
+    2  0.9940
+    3  0.9976
+    4  0.9986
+    5  0.9990
+    6  0.9993
+    7  0.9995
+    8  0.9997
+    9  0.9997
+   10  0.9997
+   11  0.9997
+   12  0.9998
+   13  0.9998
+   14  0.9998
+   15  0.9998
+   16  0.9998
+   17  0.9998
+   18  0.9998
+   19  0.9998
+   20  0.9999
+   21  0.9999
+   22  0.9999
+   23  1.0000
+   24  1.0000