Contributors

Daniel Bourdeau

Runs the project: chose and checked the targets, directed the work with Claude, and built and maintains the website and the ledger.

project lead · 461 of the project’s own targets: key recovered here ×96 · read with an outside key or decipherment ×202 · not solved ×115 · not applicable ×48 · besides these, 196 outside solutions checked and filed · all write-ups → · the project’s share

George Lasry

Cryptanalyst (DECODE, CrypTool); co-author of the LLM paper; many keys on DECODE and in Tomokiyo's GL.htm; unpublished solutions shared privately.

solution ×77 · verification · key or decipherment used ×42 · earlier solution ×17 · key corrected · transcription ×4 · identification ×2 · pointer to a source ×7 · their write-ups →

• Siena no. 12: a royal bride for Sforza, Naples 1413 — solution: With CTTS and Claude, 15-17 Oct 2026: transcription by Claude, refined in CTTS; key recovered by Claude's own simulated annealing, then refined; reading, translation and dating.
• Siena nos. 20 and 23: two documents under one graphical key — solution: With CTTS and Claude, 15-17 Oct 2026: no. 23 transcribed in CTTS, no. 20 by his ResNet detector corrected in CTTS, key recovered by Claude via crib testing and dragging and refined in CTTS; both sheets read in full, translations and dating. First filed through PR #41 (17-18 Oct 2026), which said 'transcribed with CTTS, then solved by GPT-6 Astra'; English translations and checks there by Codex.
• Galeotto da Ricasoli to the Dieci di Balía, Urbino 1425 — pointer to a source: suggested the sibling letters could give the full key
• Cristofano’s cipher letters to the Signori of Siena, Concistoro 2308 nos. 6 and 24 — solution: Key recovered ciphertext-only with CTTS built-in cryptanalysis, refined by Claude Opus 5.5 and GPT-6 Astra; the filed key DECODE R4755 found to match afterwards (report of 17 Oct 2026); readings of nos. 6 and 24. First sent as a 7-page PDF on 14 Oct 2026 ('with Claude and the help of ChatGPT Astra').
• Siena no. 19: the envoys kept waiting — identification: Dated no. 19 to the 1440s in his report ('Sienese envoys, 9 March, 1440s, 112 symbols ... (names only)').
• Two Sforza letters of 4 May 1446: the reply to Zorzo del Maino and Milan to Sforza — solution: Transcribed by George Lasry with CTTS (CrypTool Transcriber and Solver), who also generated the initial key; the key and reading were improved by Astra and Fable 5.1. source; transcription: CTTS transcription of f. 68 (R7898) and f. 70 (R7899 P1). source
• Siena no. 9: Castiglione this winter, with the King of Aragon’s assent — solution: Key recovered with CTTS and Claude from the second hand's decipherment; reading, translation, context and dating (report pp. 33-34).
• Siena no. 21: “Karissimo come padre” — identification: Placed no. 21 among the fifteenth-century Sienese ciphers, one key each (report heading D).

Satoshi Tomokiyo

Cryptiana: the catalogue of unsolved historical ciphers most targets come from, and many published keys and overlays.

new cipher · verification · key or decipherment used ×52 · earlier solution ×10 · transcription ×17 · identification ×6 · pointer to a source ×26 · their write-ups →

• Marcolino Barbavara and Pietro Pusterla to Francesco Sforza, January–May 1447 — pointer to a source: Identified DECODE R1857 image P11 as the key of BnF ital. 1584 f. 69 (DECODE note, May 2024; cryptiana unsolved.htm). source
• An unaddressed Spanish cipher of 8 January 1497 (Espagnol 318 no. 95) — pointer to a source: published Lasry's alphabet and decipherment as images (cryptiana GL.htm)
• The Great Captain to Lorenzo Suárez, 17 August 1500 (Espagnol 318 no. 92) — pointer to a source: proposed the Cifra general for no. 92; key or decipherment used: partial reading of the no. 92 opening (commented out in spanish.htm) settled zap, bac, xie
• Isabella of Castile to the Duke of Estrada, 20 August 1503 — pointer to a source: named the Galende cipher for PTR 53/69 before the attempt
• De Puebla to Almazán, London, 21 April 1506 — key or decipherment used: reconstruction of Puebla's First Cipher (Puebla1.jpg) and the PARES id 2208120 source
• Diego López de Ayala to Cardinal Cisneros, 30 August 1516 — key or decipherment used: key rebuilt from R10024 (cryptiana spanish2C), read the letter; corrected here
• Rodrigo Niño to Charles V, Naples, 19 March 1522 — pointer to a source: Published description cited in the pre-existing notes supports mer/por nulls; no alphabet key used. source
• Alonso Sánchez at Venice to Charles V, 1522 — key or decipherment used: reconstruction of Sánchez's 1522 cipher (alphabet, ~177 code groups) from R9605, extended here source

Brice Dudout @bdudout

solution ×49 · new cipher · new cipher with solution ×6 · verification ×9 · key or decipherment used · earlier solution ×2 · key corrected · transcription ×2 · identification ×3 · pointer to a source ×10 · their write-ups →

• Costabili to Ercole d’Este: three clear letters, 1493 — pointer to a source: contemporary Este decipherments of the 1491-92 despatches; Berzeviczy 1914
• De Puebla to Almazán, London, 21 April 1506 — verification: parallel independent reading with the same table (363 of 366 signs); agrees word for word on most passages; proposes razón, de la, pedrique and the clear text of ll. 11-17 source
• Benedetto Fantini, Buda and Eger, 1517–18 — solution: Key found (Caprile 1519 family), blind-validated against the contemporary plaintext copy of the ciphered passage, identified on pp. 3-4 of R1126 (text not new); R1126 pp. 1-2 read 95.3% of words by sense (dudout/)
• Alfonso Cistarelli, Eger, 25 July 1520 — new cipher: pointed to Vestigia V1908 (catalogue 846), Cistarelli 14 Oct 1520 in the same cipher; has asked ASMo for the original
• Adrian of Utrecht to Charles V, 9 September 1520 — solution: key rebuilt from the Cardinal's other letters (K7, validated on held-out 2,1,99); sign shapes re-read blind by Brice Dudout; cipher paragraph of 9 Sep 1520 read
• Lope Hurtado de Mendoza to Charles V, Tordesillas, 10 December 1520 — solution: key rebuilt from the letter; 920 cipher words read, Spanish text and English translation
• Nicolas Raince to Montmorency, Rome, 1526 — solution: 20 Nov 1526: the lower 21 lines of p. 105 completed and the whole of p. 106 (35 ciphered lines, not treated before) read with Tomokiyo's table as re-measured here; 593 of 597 words read in their sense (99.3%, Daniel Bourdeau's 95% rule: 572 certain, 13 probable, 8 from the sense, 4 unresolved; recounted 28 Oct 2026); agrees with the project's p. 105 decode at 95.6% of letters; solution: 13 May 1526 (pp. 29-31): all 85 ciphered lines verified sign by sign from reading_v3, gaps filled; residue re-read (C08); 1,102 of 1,112 words read in their sense (99.1%, Daniel Bourdeau's 95% rule): 1,074 certain, 8 probable, 20 from the sense, 10 unresolved (dudout/may1526_*)
• Niccolò Ferducci to Ferdinand I, Fiume, 19 July 1532 — solution: table from the 1532 glosses; all eight groups read; Italian text and English translation

WAINUT @LcCompany

A Dutch AI company; pull requests from the LcCompany account, work done with Claude Opus 5.5 subagents.

solution ×51 · verification ×29 · key corrected ×2 · transcription ×47 · identification ×14 · pointer to a source ×12 · their write-ups →

• De Puebla to Almazán, London, 21 April 1506 — solution: cipher passages of ll. 11-29 transcribed and deciphered with Tomokiyo's First Cipher table; ll. 18-29 read as sentences source; transcription: image 1, ll. 11-29, cipher passages source
• Catherine de Médicis and the bishop of Rennes: four cipher letters, 1562–1564 — transcription: PR: fr. 3181 f. 55 lines 2, 4, 8, 9, 11-13 re-read on the image and a third reading proposed (decoded, not read)
• Henri IV to André Hurault de Maisse at Venice, 1593 — solution: PR: ff. 406 and 410 read in part from the Brienne 13 clear copies, with Tomokiyo's key confirmed on the first cipher lines of ff. 404, 406 and 410; credit for the target shared with Arya Patel (PR #7); transcription: Brienne 13 fol. 171r-172v and 193v-194v (first lines); 128 cipher signs of ff. 404, 406, 410; identification: the top of Brienne 13 fol. 171r is the end of Maisse's own letter to the King of 10 Apr 1593, not the King's letter of 8 Feb (f. 406)
• A French letter in a homophonic pigpen cipher, SP 106/10 — verification: PR #30 (WAINUT): independent hand transcription and key of ff. 243 and 241, compared with ours source; transcription: PR #30 (WAINUT): f. 242 shown to be f. 243 with the flap down; readings "voiage", "sieur" adopted source
• Comenius to Andreas Klobusiczky, 1655 — pointer to a source: WAINUT: found Patera's 1892 footnote decipherment of the 4 Aug 1655 sentence for catalogue 474 source; verification: WAINUT (PR #102): rebuilt the key from the printed decipherment of 4 Aug 1655 and checked it letter by letter against both prints (one letter in conflict: CmCasda gives 'papmtum'); 24 May passage attempted, not deciphered source; transcription: WAINUT: both cipher passages and the word (iyy) transcribed from Patera 1892 and MHH XXIII 1874, variants recorded source; identification: WAINUT: the 22 Jul 1655 letter adds invisible ink on a further page (not printed); the 6 Sept 1655 letter's secret-script passages are printed in clear in italic by Patera (p. 183 note *); a cipher word (iyy) in the 4 Aug letter; the 24 May cipher stands inside news quoted from a letter from England source
• Battier to Fagel: a court divided — solution: PR #65 and #67: folder key applied to eight 1687 passages (1,389 groups); key row 11:718/719 and the 2 Jan 1687 inventory line corrected source
• Frederick II to Louis Michell, 28 December 1751 — solution: PR #29 (WAINUT): cabinet code of 1751 rebuilt from Fagel 5177 letters and blind-tested on R1957 source
• Frederick II to Louis Michell, the ministerial letter of 28 December 1751 — solution: PR #29 (WAINUT): R1955 identified as Michell's envoy code and decoded in part (26.4%) with the Dutch decipherments of R1050/R1051; circular-letter test source

Michael Brackx @brackxm

With Claude Code, extended the Mayenne-Forget Cipher-1 readings of ff. 143, 154, 173, 196/201 and 123-124 (BnF fr. 15572), corrected key values, and found that ff. 155-157 are contemporary clear copies of ff. 143, 150 and 154 (issues #64, #68-#71, October 2026). Also BnF Espagnol 318 nos. 94 and 95 (issues #62, #63).

solution ×13 · new cipher · verification · key or decipherment used · key corrected ×2 · transcription ×6 · identification ×4 · pointer to a source ×2 · their write-ups →

• Ferdinand to John II, Hostalric 1473 and Zaragoza 1474 — solution: Directed Claude Code in transcribing BNE MSS/20211/64 and /73, rebuilding both keys and reading both cipher passages (catalogue #857); /56 transcribed.
• An unaddressed Spanish cipher of 8 January 1497 (Espagnol 318 no. 95) — solution: first reading of ll. 14-33 and the verso with Lasry's alphabet; values for Lasry's Unknown signs (with Claude Opus 5.5). Superseded by Lasry's complete reading (PR 75 recto, PR 85 verso), which agrees with it except at four words; kept in texts/ as history source; key corrected: proposed corrections to Lasry's ll. 1-13 (four of them checked here on the scan), pending Lasry source; pointer to a source: pointed to Lasry's decipherment image on GL.htm, missed here source
• The viceroy of Sicily to Ferdinand, Messina, 27 April 1503 — solution: transcription of ff. 120r-121r, homophonic alphabet recovered ciphertext-only, code groups read from context (with Claude Opus 5.5) source; identification: no. 94 in a different key from no. 93; proposed the split source
• Lorenzo Suárez to the Catholic Monarchs, Venice, 1504 (Espagnol 318 no. 93) — identification: showed no. 94 is in a different key from no. 93 (no convergence with no. 94's alphabet, 7 shared code groups, different initials); the entry was split source; transcription: transcription v3 of f. 118r-v (1,322 tokens) and the joint sign-and-group solver run with controls source
• Ferdinand the Catholic to Jerónimo de Vich, Pedrezuela, 1515 — solution: sign alphabet recovered ciphertext-only, code groups read by context and from the Terrateig crib, reading of all 124 lines with English, token table and scripts (with Claude Code, Claude Opus 5.5) source
• Giuliano Caprile, Eger, 9 March 1519 — pointer to a source: located the archivists' 1519 key in Cremonini 2017; BO value and transfer test on R1134/8c; R1128 column-shift diagnosis (OpenAI Codex-assisted) source
• Noailles to the Cardinal de Lorraine, Venice, 13 November 1558 — transcription: found the f. 60v cipher block and its gloss; corrected the f. 60r gloss readings; transcription, key from the glosses and partial reading (tools as he states; to be checked when the files arrive). Role to become solution once the reading is reproduced and graded source
• Camus de Pontcarré to Villeroy, 1586 — solution: transcription, corrected key, decode and readings of the Camus blocks with Claude Code; legend of sign shapes source

Arya Sanketbhai Patel @aryasn2026 @arya1515

solution ×8 · verification · identification ×2 · their write-ups →

• Ghinucci, Lee and Poyntz to Wolsey, 1527 — solution: PR #10: R8565 (catalogue 111) identified as the separated part of the despatch deciphered by Tuke, L&P IV 3271; write-up source
• Sormano and de Vaulx to François I, Ferrara 1529 — identification: former entry sormano1529 (PR #2): no. 63's third sheet f. 123 and its date (27 Feb 1529), 'Ioachin' = Gian Gioacchino de Passano, no. 64 without cipher source; verification: Lasry's key checked on the leaves against the twin no. 66; 20 of 22 independently derived values agree source
• Intercepted letters summarised for Nevers, 1589 — solution: PR #9: no ciphertext under no. 96 (clear summary); eleven other glossed intercepts found in the volume source
• Charles III of Lorraine to Vaudémont, 18 June 1592 — solution: PR #4: broke the cipher ciphertext-only and recovered the key (18 Sept 2026); re-read and extended by the project source
• Henri IV to André Hurault de Maisse at Venice, November 1592 — solution: PR #7: Tomokiyo's published keys applied, f. 370 deciphered and the Brienne clear copies found source
• Henri IV to André Hurault de Maisse at Venice, 1593 — solution: PR #7: the Brienne clear copies found through the Harlay piece numbers; f. 406 identified as the duplicate of f. 404 source
• Spanish despatches of 1593 in the office cipher: Miranda, Sessa — solution: PR #8: found the office's own key (BnF fr. 3995 f. 97) and read the three office-cipher letters in part; page byline source
• Diego de Ibarra from Paris, 10 July 1593 — identification: PR #8: identified no. 68 as the Feria-Mansfeld cipher, transcribed Tomokiyo's table (keyM.tsv) and read the opening source

Norbert Biermann

key or decipherment used ×5 · earlier solution ×2 · transcription · pointer to a source · their write-ups →

• Ranzo’s code, 1528: the letter to “Garbino” and Ranzo’s letters — transcription: Ranzo transcript.docx (2021), five letters, supplied by George Lasry; basis of the contributed key and decipherment. source
• A letter from Reims on the chapter’s postulation, 19 June 1589 — pointer to a source: identified the Nevers-Piles cipher as the one that reads this letter (reported on Tomokiyo's guise.htm); no text published
• Marie de Médicis to Savary de Brèves, Rome, 1610 — key or decipherment used: R2077 break with Lasry and Tomokiyo (2021)
• Giovanni Battista Pallotto to Francesco Barberini, 1629 — key or decipherment used: Barb.lat. 6956 key (with Thomas Bosbach, March 2018) on DECODE R215, applied unchanged to all 28 records
• Sir Richard Forster, cipher passage of 13 May 1644 — unpublished earlier solution: deciphered the passage independently; credited in Pitt's repository
• Twenty-two garbled ADFGVX messages of November 1918 — earlier solution: 'Norbert' of the 2017 Cipherbrain thread (comments 15-49): most of the solved messages; his block-edit method reimplemented here
• Paris nunciature (Spada, archbishop of Damiata; Bernardino Naro) to the Secretariat, 1625 (ASV Segr. Stato; DECODE R59-R61) notes — key or decipherment used: Biermann-Bosbach key for ASV Francia 64 (1625), on DECODE
• William Perwich to Lord Arlington, Paris, 9 April 1670, TNA SP 78/129 f. 180 notes — key or decipherment used: broke it independently with Lasry and Tomokiyo; TNA published plaintext reproduced here source

Harumi-Matsuba @Harumi-Matsuba

Sent by GitHub issue (Oct 2026) readings of JACAR telegrams made with Claude and cross-checked with Codex: the 1916 three-kana telegrams to Huang Xing (sankana-public) and the Japanese Army numeric kana cipher of 1902-04 (kagigo1901-public). Also, from Oct 2026 issues: Mayenne-Forget Cipher-2 readings of BnF fr. 15572 ff. 218-219 (#49) and fr. 15573 f. 120 (#51). Also BnF readings (issues #52-#56): fr. 15919 Fiesque 1567-69, Colbert 398 Ancel 1577, Baluze 103 f. 50 Le Tellier 1644, fr. 3013 no. 43 Bilia 1527, fr. 4134 Sabran 1633.

solution ×6 · new cipher with solution ×2 · verification · key corrected · transcription ×2 · identification · their write-ups →

• Bilia to Francesco II Sforza, 22 November 1527 — solution: Matched the letter to R5258, transcribed ff. 102r-v by sign name and read f. 102r, with AI only (Claude Opus 5.5 transcription, OpenAI Codex second transcriptions and image checks, Claude Sonnet image checks); shuffled-key controls; prior-work search. No human checked the transcription. source
• Scipion de Fiesque at the Emperor’s court, 1567–69 — transcription: independent transcription and decode of view 23 left (f. 18v), filling the 15 Nov 1567 letter's two open places source; solution: transcription of 44 pages, inferred key values, decipherment and controls (AI-only: Claude, Codex, Sonnet; no human check) source
• Ancel’s cipher, Vienna 1577: Archduke Matthias leaves for the Low Countries — solution: Transcription, key application, reading, controls, calibration and prior-work check of the seven pages, all done with AI (Claude, Codex); no human check. source; transcription: Symbol-name transcription of pp. 525-565 (and calibration pages 33, 258, 285). source
• Mayenne–Forget’s Cipher-2, 1586 — solution: fr. 15572 ff. 218-219 (catalogue item 12): first reading with Claude, v0.1 partial; one pass, calibration 74.8%; 86.8% measured here source; new cipher with solution: fr. 15573 f. 120r-v (not in the ledger before): reading of the whole letter with Claude and a Codex cross-check, no human check; 90.8% measured here source
• The Louis XIII–Sabran cipher, 1631–1635 — verification: earlier independent AI reading of nine fr. 4134 leaves with Lasry's key (issue #56); agrees with Lasry's on 88% of letters source
• Le Tellier to Marca, 26 April 1644: the lodgings and the opened packets — solution: transcription of f. 50r-v, key additions from f. 230r/f. 232r, reading, controls and calibration (AI-only: Claude and Codex) source; identification: showed that Baluze 103 holds no period decipherment of f. 50: the 1921 catalogue's 'avec traductions' holds for ff. 171, 189, 200, 230 only source
• The Japanese Army’s numeric kana cipher, 1902–04 — new cipher with solution: Found the numeric kana telegrams in JACAR, reconstructed the 1902-04 table, read four telegrams with controls; Claude Opus 5.5, Codex and Sonnet, no human check source
• Huang Xing’s three-kana telegrams, May 1916 — solution: Both 20 May 1916 telegrams read with the formula (229 groups, 86 spelling-corrected, 4 inferred), the second copy in B03050731100, the reply's addressees 詔 鬯 and 正寄函 from the cipher, the six senders identified source; key corrected: Showed that this project's cursive transcription of the reply (誥/蕘 邕, 正發書, 章行嚴) disagrees with the cipher source

Feyseel Nur @Feyseel

solution ×3 · new cipher with solution ×3 · verification · transcription · their write-ups →

• Aerssen to Oldenbarnevelt, 25 May 1601 — new cipher with solution: PR #22: Aerssen 25 May and 2 June 1601, key rebuilt from the sibling glosses (with Claude and Codex) source
• Coenraad van Beuningen to Gaspar Fagel, 23 May/2 June 1676 — new cipher with solution: PR #22: Van Beuningen's unglossed 2 June 1676 letter, key rebuilt from sibling glosses (with Claude and Codex) source
• Battier to Fagel: a court divided — new cipher with solution: PR #22: Battier 1686-88 letters read with the named key NA 1.10.29 inv. 1209 (with Claude and Codex) source
• Palm to Starhemberg and Visconti, 1727 — verification: PR #21: word-level solver test on R7927; no German, the block traced to glosses or transcription source
• Van Dedem at Constantinople, 1788–1793 — solution: PR #21: the code shown alphabetical within 500-group blocks (five-column layout); 354-value graded table; R2122 and R2131 decoded in part source
• George W. Erving to James Madison, Madrid, 10 August 1807 — solution: PR #21: transcription, Pinckney legation code rebuilt to 414 rows, letter decoded source
• Armstrong’s coded postscript to Madison, 1808 — transcription: PR #21: frame collation of the 15 and 22 Feb 1808 despatches, correcting Founders' group lists source
• Catherine de' Medici to Paul de Foix, 15 Jan 1563, BL Add MS 4136 ff. 148v-149 (DECODE R9241) notes — solution: PR #21: R9241's key identified as de Foix's 1565 cipher; frozen-key partial reading, independently confirming Beck source

Mírka

Key spreadsheets on DECODE records.

key or decipherment used · earlier solution · pointer to a source ×3 · their write-ups →

• Ferdinand to Trauttmansdorff, 1634 — pointer to a source
• Kurz von Senftenau to Trauttmansdorff, Hamburg 1639 — earlier solution: rebuilt the key and read R3811 (summary only, key not printed in the article); his key table (xlsx and handwritten, 30 Nov 2022) is attached to DECODE R3813 and R3814, found here 23 Oct 2026 after our key was rebuilt independently, and used to check k = to and m = va
• Charles VI to Count Windischgrätz, 3 February 1720 — pointer to a source: Zapadoceske archivy 2012 article describing the letters and keys
• Charles VI to Count Windischgrätz in the private key, 1720–1722 — pointer to a source: Zapadoceske archivy 2012 article describing the letters and keys
• A letter between the Windischgrätz brothers, Brussels 1721 — key or decipherment used: reconstructed key (xlsx on DECODE R5029), applied unchanged

Brett Burford @BravoBravoIX

Independent re-reading with Claude of the Baudouin-Desportes letters of 22 July 1593 (18 October 2026), a check of Rosson's first reading; first readings with Claude of Matignon's Cipher-3 despatch BnF fr. 15573 ff. 379-381 (issue #44) and of the Mayenne-Forget Cipher-2 letter fr. 15573 f. 385 (issue #46), October 2026.

new cipher with solution ×2 · verification ×2 · their write-ups →

• Mayenne–Forget’s Cipher-2, 1586 — new cipher with solution: fr. 15573 f. 385r-v (not in the ledger before): first reading of the whole letter with Claude Opus 5.5, v0.2 19 Oct 2026; code values from five letters deciphered at the time; 82.9% measured here source
• Matignon’s Cipher-3, 1586 — new cipher with solution: fr. 15573 ff. 379r-381v, a six-page Cipher-3 despatch not in the ledger: first reading of the whole despatch with Claude Opus 5.5 (v0.5, 19 Oct 2026), key values from fr. 15570 ff. 271-273; 89.6% measured here source
• Baudouin-Desportes to Aldobrandini and to Frachetta, 22 July 1593 — verification: independent second reading with Claude Opus 5.5, made before opening Rosson's text; agrees on 95.9% (f. 189), 93.1% (f. 186r), 93.8% (f. 186v) of signs source
• R4306: a Dutch diplomatic report — verification: issue #47: independent keyless re-reading agreeing with Lasry's key; address-leaf note read as Dutch with the tailed o = 8 source

Sofia Pettersson

Transcriber on DECODE.

transcription ×4 · their write-ups →

• A French news letter in the Queen’s papers, July 1645 — transcription: DECODE ciphertext transcription of ff. 216-217
• Henrietta Maria’s household to Charles I, September 1645 — transcription: DECODE ciphertext transcriptions of ff. 213-215, 230-232, 233-234
• From the Queen’s household at Paris to Charles I, January 1646 — transcription: DECODE ciphertext transcription of ff. 235-236
• Henrietta Maria’s household to “Sir”, Paris, 26 January 1646 — transcription: DECODE ciphertext transcription of f. 247 (R929) used

NoAutopilot @NoAutopilot

new cipher with solution · earlier solution ×2 · transcription · their write-ups →

• Dinteville to the Duke of Nevers, 1 and 4 July 1592 — earlier solution: partial key and word fragments of f. 130, completed by PR #24 source
• Le Tellier to Marca, 26 April 1644: the lodgings and the opened packets — earlier solution: partial draft of f. 50 with Tomokiyo's table (451 of 630 signs valued, parked 13 Oct 2026); the contributor used its view numbers, image route and period-decipherment transcriptions of ff. 190r and 205r source
• Archduke Leopold Wilhelm’s instruction to the abbé de Mercy, 6 June 1648 — new cipher with solution: GitHub issue 16: brought in f. 22 with transcription and key recovered ciphertext-only (cipher-lab); corrected and names identified here source
• Miguel Fernández Durán to the marqués de San Felipe, El Pardo 30 Nov 1718 (ACA Diversos, Legación en Génova y Turín, Cajón 1 leg. 22 doc. 67; DECODE R10181) notes — transcription: two-pass transcription of R10181 and value ranges of the nine keys source

Nils Kopal

key or decipherment used ×2 · earlier solution ×2 · their write-ups →

• Sigismund Heusner von Wandersleben to Axel Oxenstierna, 1637 — key or decipherment used: key and plaintext (with Waldispühl), HistoCrypt 2024, on DECODE R4332
• Das zweyte Silentium Dei, an alchemical book of 1798 — earlier solution: decrypted p. 24 (video), and gave Schmeh the tip; used as a check source
• Twenty-two garbled ADFGVX messages of November 1918 — key or decipherment used: published ADFGVX period keys (Lasry, Niebel, Kopal, Wacker)
• Jan Chodkiewicz (Szklow) to Maximilian II, 22 February 1575, HHStA Chiffrenschluessel Kt. 14 Fasc. 20 ff. 210-212 (DECODE R1473) notes — earlier solution: deciphered in full, HistoCrypt 2023; plaintext on DECODE R1473 source

Frode Weierud

transcription ×3 · their write-ups →

• German police double-box radiograms of 27 February 1942 — transcription: German Police Doppelkastenschlüssel Messages (CryptoCellar 2020): the six messages from NARA RG 457, source of the ciphertext source
• The police radiogram of 16 June 1942: Bletchley’s decrypt of the Borki report — transcription: German Police Doppelkastenschlüssel Messages (CryptoCellar 2020): the A115 ciphertext and Red Forms from NARA RG 457 source
• German Army Truppenschlüssel messages, net pz6, 4 July 1941 (Nr. 88, 90, 91, 92, 94, 95, 96, 97; catalogue 643): broken by Norbert Paefgen and Ben Davies (AI) in September 2026, plaintext not published notes — transcription: ciphertext of the 4 July messages on the CryptoCellar TS page, with Olaf Ostwald; facsimiles of Nr. 88, 94, 95 source

Juan Carlos Galende Díaz

key or decipherment used ×2 · identification · their write-ups →

• The Great Captain to Lorenzo Suárez, 17 August 1500 (Espagnol 318 no. 92) — key or decipherment used: Cifra general de los Reyes Católicos printed 1994; read no. 92
• Isabella of Castile to the Duke of Estrada, 20 August 1503 — key or decipherment used: Cifra general de los Reyes Católicos (Galende 1994), applied unchanged
• Micer Mai (Rome) to the Comendador Mayor de León, 12 Sept 1531, AGS Estado leg. 853 fol. 85 (DECODE R9960) notes — identification: names sender (Micer Mai) and recipient (Comendador Mayor de León)

Paolo Bonavoglia

key or decipherment used ×2 · earlier solution · their write-ups →

• Alvise Mocenigo to Doge Lorenzo Priuli, Rome, 25 April 1558 — key or decipherment used: "Decifra dispacci veneziani" (crittologia.eu): transcription and full decipherment of R1873
• Sebastiano Foscarini to the Doge, Paris, 11 September 1680 — earlier solution: Full decipherment of the despatch on crittologia.eu (storia/SebFoscarini_Parigi16800911.html), retrieved 27 Oct 2026 source
• A cipher slip from Brussels to the Cologne nunciature, 1721 — key or decipherment used: reading with English translation on DECODE R24

Thomas Bosbach

Cipherbrain commenter; Catokwacopa DYING DECLARATION; Charles I 1648 nomenclator with Biermann and Brown.

key or decipherment used ×2 · earlier solution · their write-ups →

• Giovanni Battista Pallotto to Francesco Barberini, 1629 — key or decipherment used: Barb.lat. 6956 key (with Norbert Biermann, March 2018) on DECODE R215
• The Catokwacopa advertisements of 1875 — earlier solution: DYING DECLARATION
• Paris nunciature (Spada, archbishop of Damiata; Bernardino Naro) to the Secretariat, 1625 (ASV Segr. Stato; DECODE R59-R61) notes — key or decipherment used: Biermann-Bosbach key for ASV Francia 64 (1625), on DECODE

Wanruo Luo

key or decipherment used · earlier solution ×2 · their write-ups →

• Cardinal Caracciolo to Charles V, 14 November 1537 — key or decipherment used: Cifrario 38 (2021 thesis), read the letter unchanged
• Charles V to the Empress Isabella, Borgo San Donnino 17 May 1536 (AGS Estado leg. 496 ff. 270-274, DECODE R9957) and to Prince Philip, Cremona 19 June 1543 (AGS Estado leg. 59 ff. 10-14, DECODE R9952) notes — earlier solution: R9957 deciphered and printed (thesis 2021, p. 287) from its key AGS Estado leg. 1.1.1 doc. 169
• AGS Estado leg. 496, DECODE R9955 (Charles V to Isabella, Regensburg 30 Apr 1532) and R9956 (Cobos? to Vazquez de Molina?, Brussels 11 Jan 1531) notes — earlier solution: R9955 printed in her thesis p. 285

David Scheers

Author of Zealous with Language and Ciphers (2021); traced the surviving copies of Urquhart's octastich and distich leaves.

transcription ×2 · identification · pointer to a source ×2 · their write-ups →

• The Devil’s Handwriting (Ambrogio, Pavia 1539) — identification: PDF 'Remarks devil's handwriting' identified the image as Ambrogio 1539 f. 212v and collected the sources; transcription: 153-sign transcription used in the solver runs; pointer to a source: redrawn Amadi Letere diaboliche table, 31 signs with demon names
• Urquhart’s Cyphral Octastich (1652) and Distich (1653) — transcription: 1653 distich leaf (NLS H.32.a.39) and its position 56 = 38; octastich sums and p. 149 'Colonel' checked; pointer to a source: photographs of the 1652 pp. 156-159: no leaf missing; numbers 158 and 159 both on printed [158]; distich variants suggested

Bryan Payne @bdpayne

With OpenAI Codex: additional research and transcriptions for catalogue450, including key219 / printed1771 fragment match. Catalogue 681 continuation, with OpenAI Codex (GPT-6): transcriptions, key-use chronology and prior decipherment pointers.

transcription ×2 · identification · pointer to a source · their write-ups →

• C.W. von Düben, St Petersburg, to N.P. Gyldenstolpe and Queen Lovisa Ulrika, 1764-1765: numeric cipher letters filed with clear drafts (Riksarkivet K 259; Unsolved Catalogue no. 450) notes — transcription: With OpenAI Codex: May transcription, preliminary tables, public key search and Schück fragment match; payne2026/. source
• Richard Taylor telegram books: February key usage, further readings and unresolved transcription (catalogue 681; in progress) notes — transcription: Continuation with OpenAI Codex (GPT-6): image transcriptions, explicit glyph uncertainty and reproducible alignments.; identification: Identified dated 9 March recipient-specific keyword orders and additional THE NAVY OUR PRIDE key fit from external plaintext.; pointer to a source: Located further printed decipherments in OR I/45/2 p.772 and I/49/2 pp.1223,1255; preserved prior WAINUT credit.; transcription: Further six-message candidate alignments with OpenAI Codex; uncertain/reconstructed streams separated.; identification: Earlier4February COME RETRIBUTION use and21February Wirt Adams COMPLETE VICTORY witness; recipient-specific chronology.; pointer to a source: Further existing OR decipherments and dating/wording variants; no novel plaintext claim.

Satoru

satoru.net; worked with Claude Opus 5.5.

solution · identification · pointer to a source · their write-ups →

• Spanish despatches of 1593 in the office cipher: Miranda, Sessa — pointer to a source: satorunet's note that the f. 97v endorsement labels the f. 97 key, and his count of the nomenclature, prompted the re-reading of the key sheet source
• Fra Guglielmo Vizani to the Comte de Césy, 1637 — solution: transcription, key and reading (with Claude), emailed and published; verified here source; identification: Monsignor Beria identified with Kontaris

Angus Robinson @AngusRobinson

solution ×2 · their write-ups →

• Seure’s letters from Lisbon, December 1558 — solution: PR #40: key (118 signs, 21 nulls, cancellation sign) and full decipherment of nos. 39-41, 43-44, from cribs on the adjacent deciphered leaf plus annealing and manual correction source
• Desiderio l’Abbé to the Duke of Nevers, 1577 — solution: PR #20: key recovered ciphertext-only with the probable word l'empereur, all 31 runs deciphered source

Harrison Bornstein @harrison-bornstein

Directed Claude Code on catalogue 885 (ibrahim1548, PR #196: the Malvezzi key as the candidate) and on DL 46150 (buda1490, PR #199).

solution · pointer to a source · their write-ups →

• Maffeo da Treviglio to Tamás Bakócz, Milan 30 Nov 1490 (MNL OL DL 46150): the Sforza-Corvinus marriage and the dowry, four pages in cipher notes — solution: supplied the Hungaricana images, directed the transcription, the ciphertext-only break and the reading from the minute, and contributed the result
• Sigismund August, Frater Georg and Queen Isabella to Ibrahim Pasha, 1548 (HHStA Wien StAbt Türkei I 7-4-4, 7-4-5, 7-4-9; catalogue 885) notes — pointer to a source: Report on catalogue 885 (PR #196) identified the Malvezzi key R367 as the candidate and the persons covered by its code words. source

Larry Beck @larrycbeck

solution ×2 · their write-ups →

• Otto von der Malsburg’s cipher letters to Landgrave Wilhelm V, 1637 — solution: PR #17: period-five key of the f. 12 alphabetic block recovered (with ChatGPT), critical reading source
• Catherine de' Medici to Paul de Foix, 15 Jan 1563, BL Add MS 4136 ff. 148v-149 (DECODE R9241) notes — solution: PR #18 (with ChatGPT): proposed partial decipherment of R9241, judged a real partial break; PR #27: five-sign audit source

Paolo Rosson @pangoleen

Directed Claude in the independent Ranzo / Centurione 1528 cipher solution reported 6 October 2026, and in the first reading of the Baudouin-Desportes League cipher letters of 22 July 1593 (1 October 2026).

solution · verification · earlier solution · their write-ups →

• Ranzo’s code, 1528: the letter to “Garbino” and Ranzo’s letters — earlier solution: Independent contemporaneous solution with Claude, reported alongside Lasry’s by Tomokiyo on 6 October 2026; the existing project section applies Rosson’s key separately. source; verification: his independently rebuilt key, applied here to Biermann's transcription, agrees with Lasry's on 94-96% of the tokens both value (measure_lasry.py, 18 Oct 2026) source
• Baudouin-Desportes to Aldobrandini and to Frachetta, 22 July 1593 — solution: first reading of both letters, with Claude Opus 5.5: recogniser trained on 6,794 aligned signs, Tomokiyo's key, LM decoder; v0.2 of 1 Oct 2026 source

Richard Bean @RichardBean

key or decipherment used · transcription · pointer to a source · their write-ups →

• The Milroy telegrams, 1861–62 — key or decipherment used: solution of the Milroy telegrams (Stager cipher No. 7, with Claude Opus 5), spot-checked here; nothing added source
• 'BLUME SALAMANCA' telegram 1, Zurich -> Salamanca via London, 8 Jan 1937 (Swiss Federal Police file on Werner Oswald) notes — transcription: GitHub issue 14: three letters of telegram 1 corrected (L misread as I), with SHA-256 checks source; pointer to a source: pointed to the full image of the second telegram in Schmeh's post source; pointer to a source: issue #37: unsourced Doppelwürfel claim removed; repeated strings shared by the two telegrams source

alejandrozarco @alejandrozarco

solution ×2 · their write-ups →

• Matignon’s Cipher-3, 1586 — solution: PR #25: f. 276 deciphered with Tomokiyo's Cipher-3 key (96.2%), fr. 15571 f. 179 transcribed and checked against Tomokiyo's interlinear decipherment (92.9%); key checked on ff. 277r/279-280 and extended source
• Dinteville to the Duke of Nevers, 1 and 4 July 1592 — solution: PR #24: transcription, key rebuilt from the f. 128 gloss, f. 130 deciphered source

ry-xu @ry-xu

solution · pointer to a source · their write-ups →

• Duke Ernst of Bavaria to Wilhelm V: the “Post Scripta” dot cipher of 1583 — pointer to a source: pointed to Leighton 1974 and the old shelfmark
• A letter to Duke Wilhelm V of Bavaria, 12 June 1583 — solution: key recovered ciphertext-only and decryption, issue #89 source

Ivan Parisi

key or decipherment used · pointer to a source · their write-ups →

• Federico of Naples to the Catholic Monarchs, 11 January 1497 (Espagnol 318 no. 5) — key or decipherment used: identified Escrivà's cipher and printed the whole letter, SSMD n.s. IV (2020) 157-177; the text here is his source
• Ferdinand II to Garcilaso de la Vega, 31 August 1498 — pointer to a source: located the passages and named the RAH A-11 Garcilaso cipher letters as the probable key (Pedralbes 24, 2004, n. 13)

Jean-François Bouchaudy

Photographs and study of Napoleon's Grand Chiffre tables (Service historique de la Défense).

key or decipherment used · pointer to a source · their write-ups →

• Jourdan to Soult, Madrid, 28 May 1812, and Marmont to Jourdan, 1 June 1812 — pointer to a source: his photographs of the SHD "B n° 30" table, from which the entries were read source
• King Joseph to Napoleon, December 1812 (catalogued as Berthier, 22 Dec 1812) — key or decipherment used: photographs of the deciphering table of the Great Cipher of 1812 (SHD B n. 30), from which dudout/key_entries.tsv was read

Jozef Krajčovič @kjfriedo

Catokwacopa QUI FIT reading and exact-cost audits, Cipherbrain.

verification · earlier solution · their write-ups →

• Napoleon III / Empress Eugénie — verification: issue #39: hand re-reading of four pages against Lasry's key; token corrections proposed; f21 a different nomenclator source
• The Catokwacopa advertisements of 1875 — earlier solution: QUI FIT (Horace, Satires 1.1) and 2026 exact-cost audits

Thomas Ernst

earlier solution · transcription · their write-ups →

• The Catokwacopa advertisements of 1875 — transcription: BNA-verified transcription and line numbering, the text used here
• The Roosevelt cryptogram, Washington 1935 — earlier solution: argued the digit block is a doodle (tick-joined pairs give 10-52 once each), confirmed here

Ajaydas Devadas

key or decipherment used ×2 · their write-ups →

• Philip II to the nuncio Ormanetto, 1573 — key or decipherment used: Spain nunciature cifra ordinaria reconstructed (with Claude) from R116/R118 and emailed; applied to the project's transcription and verified
• Ormanetto and Clementino, Spain nunciature, 1576–77 — key or decipherment used: Spain nunciature cifra ordinaria (emailed 1 Oct 2026) reads R118

Judit W. Somogyi

key or decipherment used ×2 · their write-ups →

• Maffeo da Treviglio at Buda to Ludovico Sforza, 1489–1490 — key or decipherment used: 2016 numeric key and lines 1-2 of the 22 Nov 1489 letter; tied to the signs and extended here
• Giuliano Caprile’s sign cipher, 1520–1521 — key or decipherment used: printed decipherments of V1920 and R1138 (Scriptorium VI, 2025) used as cribs to rebuild the key

M. W. Kaczka

key or decipherment used ×2 · their write-ups →

• News from Bender, 1709: two letters in the Turculeț key — key or decipherment used: key B (Danubius XXX, 2012, fn. 22), used to check the interlinear decipherment
• Brâncoveanu and Cantacuzino to Hetman Sieniawski, 1709–1714 — key or decipherment used: Danubius XXX prints twelve of the Sieniawski-group letters and the Wallachian chancellery key (A) and the Turculeț key (B); used to read and check

Michelle Waldispühl

key or decipherment used · earlier solution · their write-ups →

• Sigismund Heusner von Wandersleben to Axel Oxenstierna, 1637 — key or decipherment used: key and plaintext (with Kopal), HistoCrypt 2024, on DECODE R4332
• Jan Chodkiewicz (Szklow) to Maximilian II, 22 February 1575, HHStA Chiffrenschluessel Kt. 14 Fasc. 20 ff. 210-212 (DECODE R1473) notes — earlier solution: deciphered in full, HistoCrypt 2023; plaintext on DECODE R1473 source

Robert Pitt

key or decipherment used ×2 · their write-ups →

• Charles I and Nicholas to Boswell, 2 November 1643 — key or decipherment used: alphabet, supplementary homophones, nulls and four word codes (GitHub charles-i-boswell-cipher, commit 609ebf4) source
• Sir Richard Forster, cipher passage of 13 May 1644 — key or decipherment used: public key, GitHub robertpitt/forster-cipher (14 Sept 2026), applied literally source

Robert Węglarek @tunarob

key corrected · transcription · their write-ups →

• Nevers to Revol, 1593: the Court symbol cipher no. 60 — key corrected: issue #32: corrections to key no. 60 (10 of 12 adopted), tag split, partial reading of f. 88r source; transcription: issue #32: transcription of fr. 3985 f. 88r-v (116 units of f. 88v) source

setsunaatto @setsunaatto

solution · verification · their write-ups →

• Laurière to the duc de Nevers, July–August 1593 — solution: GitHub issue 13: identified key no. 57 as Laurière's and read no. 55 with it (transcription and reading) source; verification: PR 15: blind test of key no. 57 against the office's interlinear decipherment of no. 10 source

Adam Wright

pointer to a source · their write-ups →

• Burghley to Walsingham, 29 January 1573 — pointer to a source: pointed to the Folger 'Elizabethan Court Day by Day, 1573' summary of this letter (after Read 1960), which identified the cover-names (Davison = Maisonfleur, Hall = the Queen, Glasgow and [9] = Alençon, La Mole)

Alain Dufour

Genevan historian; editor of René de Lucinge's letters (Droz 1964, 1966) and of the Geneva-Savoy war of 1589-93.

identification · their write-ups →

• Bienvenut to “Vostre Altesse”, Paris, February 1590 — identification: edition of René de Lucinge, Lettres sur les débuts de la Ligue (1585), Droz 1964, which names the Savoyard secretary Bienvenu

Andrew Aymeloglu @aaymeloglu

earlier solution · pointer to a source · their write-ups →

• Ferdinand III and the Cardinal-Infante, 1634–1640 — earlier solution: R1889, R1890 read and R1887 partial, github.com/aaymeloglu/unsolved-ciphers source; pointer to a source: README: the 1640 additions are mostly syllables (read before the R1890 recovery)

Dariusz Rolnik

Historian; his 2025 article on Deboli's Great Sejm despatches cites the 1790-92 texts in Zbiór Popielów 415/420/421 as ciphered correspondence.

pointer to a source · their write-ups →

• Antoni Augustyn Deboli to King Stanisław August, cipher despatches from St Petersburg, 1788-1792 (AGAD Zbiór Popielów 428, 17, 4, 5, 416; catalogue 417-421) notes — pointer to a source: cites the ZbPop 420 texts as Deboli's ciphered despatches, which led to the pairing

Dolly Moulekhi @dollymoulekhi

Matched the horizontal alphabet strip of DECODE R4325 to the Riksarkivet numerical letter R4284 and decoded it, with AI assistance (issue #98, October 2026).

solution · their write-ups →

• A Swedish cipher letter of 1628 (R4284) — solution: matched the R4325 alphabet strip to R4284, literal decode and transcription review (AI-assisted, Cursor) source

Eloy Caballero

Word-divided transcription and tentative Latin reading of the Sirtori cipher f. 85 (Cipher Mysteries, 2012).

transcription · their write-ups →

• Two letters in Girolamo Sirtori's cipher (to Andres de Prada and to Juan Baptista de Tassis), Valladolid 1604, in Luis Valle de la Cerda's papers (BNE Mss/994 ff. 85r, 86r-86v; Cryptoole ITXXXX-1) notes — transcription: word-divided f. 85 used for group counts; his Latin reading not used source

Felipe Rojas

Brown University; with Stephen Houston, 'The Devil's Writing', Maya Decipherment, 6 Apr 2024: transcribed and translated Ambrogio's f. 212v-213r account, including the trident sentence.

pointer to a source · their write-ups →

• The Devil’s Handwriting (Ambrogio, Pavia 1539) — pointer to a source: co-author of the same post source

Francesco Senatore

identification · their write-ups →

• Galgano Borghesi to Leonardo Benvoglienti, 1456 — identification: identified no. 4 as Galgano Borghesi's letter from Naples, May 1456

Ilya

Reader who wrote by email (Sept 2026); surname not recorded.

identification · their write-ups →

• The police radiogram of 16 June 1942: Bletchley’s decrypt of the Borki report — identification: located Borki (Kirovsk district, Mogilev region) named in the A115 decrypt

Joe

Commenter on Klaus Schmeh's Cipherbrain blog.

transcription · their write-ups →

• Cardinal Soglia to the nuncio Viale Prelà, 1848 — transcription: transcription of the printed cryptogram (Cipherbrain blog comment #4), used with one digit restored

Klaus Schmeh

transcription · their write-ups →

• Urquhart’s Cyphral Octastich (1652) and Distich (1653) — transcription: 272-number transcription of the octastich, used in the first measurement

Olaf Ostwald

Co-author with Frode Weierud of 'Modern Cryptanalysis of the Truppenschlüssel' (Cryptologia) and of the CryptoCellar transcriptions of the German Army TS messages of 1941.

transcription · their write-ups →

• German Army Truppenschlüssel messages, net pz6, 4 July 1941 (Nr. 88, 90, 91, 92, 94, 95, 96, 97; catalogue 643): broken by Norbert Paefgen and Ben Davies (AI) in September 2026, plaintext not published notes — transcription: ciphertext of the 4 July messages on the CryptoCellar TS page, with Frode Weierud source

Sara Gómez Hernández

Transcribed the Sirtori cipher (BNE Mss/994) in a final-year project, before June 2012.

transcription · their write-ups →

• Two letters in Girolamo Sirtori's cipher (to Andres de Prada and to Juan Baptista de Tassis), Valladolid 1604, in Luis Valle de la Cerda's papers (BNE Mss/994 ff. 85r, 86r-86v; Cryptoole ITXXXX-1) notes — transcription: 27-symbol stream of ff. 85-86v used for the solver runs source

Stephen Houston

Brown University; with Felipe Rojas, 'The Devil's Writing', Maya Decipherment, 6 Apr 2024: transcribed and translated Ambrogio's f. 212v-213r account, including the trident sentence.

pointer to a source · their write-ups →

• The Devil’s Handwriting (Ambrogio, Pavia 1539) — pointer to a source: printed and translated Ambrogio's account including the trident sentence (2024); the omen reading was not drawn there source

johonn @johonn

Directed Claude Code in rebuilding the 1729 Port Sainte-Marie code from its deciphered sibling enclosures and applying it to the undeciphered report in Huntington mssBLA 191 (newcastle1729, October 2026).

solution · their write-ups →

• Intelligence report from Port Sainte-Marie in numerical code, enclosed to the Duke of Newcastle, 1729 (Huntington Library mssBLA 191, p. 5) notes — solution: Directed Claude Code in rebuilding the code from the deciphered sibling enclosures and applying it to mssBLA 191 p. 5 (catalogue #826).

saberwatchmanga @saberwatchmanga

sun-circle-cipher-1916 (10 Oct 2026): identified the 1916 print of the first 20 May 1916 telegram to Huang Xing (Huguojun jishi no. 5) and audited the JACAR B03050089100 transcription.

identification · their write-ups →

• Huang Xing’s three-kana telegrams, May 1916 — identification: Found the 1916 print of telegram 1 (護國軍紀事 no. 5) and transcribed it; audit of the stream source

yuanyi-350 @yuanyi-350

pointer to a source · their write-ups →

• Nicolas Desmarets to an unnamed correspondent, Marly, 4 June 1710 — pointer to a source: issue #28: Tomokiyo's 1710 table and the continuous-stream reading source

Alexandre Pillon

key or decipherment used · their write-ups →

• Nicolas Desmarets to an unnamed correspondent, Marly, 4 June 1710 — key or decipherment used: alignment behind Tomokiyo's 1710 table

Anne-Simone Rous

earlier solution · their write-ups →

• Cipher note in a Rosicrucian book of 1618, Zurich — earlier solution: identified the monoalphabetic substitution and gave a partial decipherment, used here as the crib; published in Korn 2023 n. 41

Ben Davies

Broke German Army Truppenschlüssel messages of 1941 in September 2026, marked (AI) for AI-assisted on the CryptoCellar 1941 Message List, among them net pz6 Nr. 88-97 of 4 July 1941.

earlier solution · their write-ups →

• German Army Truppenschlüssel messages, net pz6, 4 July 1941 (Nr. 88, 90, 91, 92, 94, 95, 96, 97; catalogue 643): broken by Norbert Paefgen and Ben Davies (AI) in September 2026, plaintext not published notes — unpublished earlier solution: broke pz6 Nr. 88-97 of 4 July 1941, marked (AI) on the list source

Christof Rieber

earlier solution · their write-ups →

• Das zweyte Silentium Dei, an alchemical book of 1798 — earlier solution: blog comment reading most short passages, with gaps; used as a check

David Vierra @codewarrior0

key or decipherment used · their write-ups →

• Feynman ciphers nos. 2 and 3, 1953 — key or decipherment used: solution of May 2023; key re-applied and confirmed source

Gerd

Commenter on Klaus Schmeh's Cipherbrain blog.

earlier solution · their write-ups →

• The Roosevelt cryptogram, Washington 1935 — earlier solution: extended Ernst's argument to the full permutation 1..52; his number list matches the reading

Ilia Chirtulov

First to find (reported to S. Tomokiyo, 4 Oct 2026, and on Cryptiana on 12 Oct 2026) that the Great Cipher of 1812 reads the cryptogram catalogued as Berthier to Napoleon, 22 Dec 1812, and that its writer is King Joseph (napoleon).

earlier solution · their write-ups →

• King Joseph to Napoleon, December 1812 (catalogued as Berthier, 22 Dec 1812) — earlier solution: first to find that the Great Cipher of 1812 reads it and that the writer is King Joseph (reported by Tomokiyo on Cryptiana, 12 Oct 2026) source

Ingo Niebel

key or decipherment used · their write-ups →

• Twenty-two garbled ADFGVX messages of November 1918 — key or decipherment used: published ADFGVX period keys (Lasry, Niebel, Kopal, Wacker)

Lance Estes

Catokwacopa Oxford-vocabulary reading (with 'Dave'), Cipherbrain.

earlier solution · their write-ups →

• The Catokwacopa advertisements of 1875 — earlier solution: Oxford vocabulary (with 'Dave'): SUMMER TERM, 1853, CONINGTON, JOWETT, BALLIOL ...

María Josep Bertomeu Masiá

key or decipherment used · their write-ups →

• Charles V to Ferrante Gonzaga, Brussels, 14 November 1549, and four shorter passages — key or decipherment used: Her reconstruction of the key (2009), used here only as pictured by Tomokiyo; the book was not seen.

Matthew Brown

key or decipherment used · their write-ups →

• William Perwich to Lord Arlington, Paris, 9 April 1670, TNA SP 78/129 f. 180 notes — key or decipherment used: broke it independently (20-column transposition with nulls); TNA published plaintext reproduced here source

Max Baertl

Commenter on Schmeh's 2017 ADFGVX thread who read messages.

earlier solution · their write-ups →

• Twenty-two garbled ADFGVX messages of November 1918 — earlier solution: read a message in the 2017 Cipherbrain thread (comment 39)

Norbert Paefgen

Broke German Army Truppenschlüssel messages of 1941 in September 2026 (CryptoCellar 1941 Message List), among them net pz6 Nr. 88-97 of 4 July 1941.

earlier solution · their write-ups →

• German Army Truppenschlüssel messages, net pz6, 4 July 1941 (Nr. 88, 90, 91, 92, 94, 95, 96, 97; catalogue 643): broken by Norbert Paefgen and Ben Davies (AI) in September 2026, plaintext not published notes — unpublished earlier solution: broke pz6 Nr. 88-97 of 4 July 1941 (CryptoCellar 1941 Message List) source

Olga Kolosova

earlier solution · their write-ups →

• Rodrigo Niño to Charles V, Naples, 19 March 1522 — earlier solution: Earlier reconstruction of a related 1522 Niño cipher; exact-letter coverage unconfirmed; alphabet key not applied.

Pamela Kalning, Matthias Miller, Karin Zimmermann (Heidelberg catalogue 2014)

key or decipherment used · their write-ups →

• Alchymey teuczsch, an alchemists’ notebook of 1426 — key or decipherment used: 2014 Heidelberg catalogue reading of f. 93r, used as crib for set C only (Kalning, Miller, Zimmermann)

Simon Klee

earlier solution · their write-ups →

• Cardinal Farnese to the nuncio Poggio, 1542 (Vatican Challenge Part 5) — earlier solution: "The Farnese letter": key and plaintext, accepted by MysteryTwister; reviewed and accepted here source

Vals AI

earlier solution · their write-ups →

• Urquhart’s Cyphral Octastich (1652) and Distich (1653) — earlier solution: octastich rule and plaintext published (Claude Fable 5.1 result); verified here without it

Wacker

key or decipherment used · their write-ups →

• Twenty-two garbled ADFGVX messages of November 1918 — key or decipherment used: published ADFGVX period keys (Lasry, Niebel, Kopal, Wacker)

Woodard

Transcriber and decipherer on DECODE.

key or decipherment used · their write-ups →

• Sir Ralph Boswell to William Boswell, December 1627 — key or decipherment used: monoalphabetic key, transcription and plaintext on DECODE R413; open signs filled here