41554 blogs · [ { "id": "01a0c52d-1485-7327-aa18-ff1bbb5de7f4", "title": "Substitution Cipher in Hangul", "url": "https://cryptiana.blogspot.com/2025/02/substitution-cipher-in-hangul.html", "published_at": "2025-02-13T21:27:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bbb9f2a26", "title": "Yardley's Codebreaking of a Chinese Book Cipher (1939)", "url": "https://cryptiana.blogspot.com/2025/02/yardleys-codebreaking-of-chinese-book.html", "published_at": "2025-02-09T04:39:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bbc0b680b", "title": "Yardley's \"Device\" to Convey a Secret Message under an Ostensible Plaintext?", "url": "https://cryptiana.blogspot.com/2025/02/yardleys-device-to-convey-secret.html", "published_at": "2025-02-08T12:55:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bbc6794b8", "title": "Secret Chinese Codebooks Preserved in US", "url": "https://cryptiana.blogspot.com/2025/02/secret-chinese-codebooks-preserved-in-us.html", "published_at": "2025-02-03T20:27:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bbc7a1681", "title": "Undeciphered Letters of Richelieu and Mazarin", "url": "https://cryptiana.blogspot.com/2025/02/undeciphered-letters-of-richelieu-and.html", "published_at": "2025-02-02T20:17:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bbd341d79", "title": "Variable-length Figure Cipher between Henry de la Tour and Duke of Nevers (1589, 1591)", "url": "https://cryptiana.blogspot.com/2025/02/variable-length-figure-cipher-between.html", "published_at": "2025-02-02T01:54:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bbd3820dd", "title": "French Code at the time of Peace Talk at Geertruidenberg (1710)", "url": "https://cryptiana.blogspot.com/2025/01/french-code-at-time-of-peace-talk-at.html", "published_at": "2025-01-31T13:06:00+00:00" }, { "id": "01a0c537-b92e-70f1-8c5f-debbc3278d02", "title": "French Diplomatic Code Shortly before the Peace of Rijswijk (1694)", "url": "https://cryptiana.blogspot.com/2025/01/french-diplomatic-code-shortly-before.html", "published_at": "2025-01-26T20:58:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c08f33ebf", "title": "Instructions for Code Switching in a Set of Codes in English (1792)", "url": "https://cryptiana.blogspot.com/2024/12/instructions-for-code-switching-in-set.html", "published_at": "2024-12-01T08:04:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c09c6a581", "title": "Codebreaking without Command of the Language", "url": "https://cryptiana.blogspot.com/2024/11/codebreaking-without-command-of-language.html", "published_at": "2024-11-01T20:26:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c09e15f4d", "title": "Japanese Edition of Codebreaking: A Practical Guide by Elonka Dunin and Klaus Schmeh", "url": "https://cryptiana.blogspot.com/2024/11/japanese-edition-of-codebreaking.html", "published_at": "2024-10-31T22:08:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c09f0eeef", "title": "A Great Cipher Left Undeciphered by William Blencowe", "url": "https://cryptiana.blogspot.com/2024/10/a-great-cipher-left-undeciphered-by.html", "published_at": "2024-10-26T12:15:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c0a3c7b9c", "title": "Frederick I of Prussia's Transposition Cipher", "url": "https://cryptiana.blogspot.com/2024/10/frederick-i-of-prussias-transposition.html", "published_at": "2024-10-25T13:42:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c0b0aad9d", "title": "Cardinal Richelieu Used a Porta-like Pairing Cipher?", "url": "https://cryptiana.blogspot.com/2024/10/richelieu-used-porta-like-pairing-cipher.html", "published_at": "2024-10-24T13:20:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c0b33a87c", "title": "Some Ciphers from Henry IV's Time", "url": "https://cryptiana.blogspot.com/2024/10/some-ciphers-from-henry-ivs-time.html", "published_at": "2024-10-19T08:49:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c0bd37706", "title": "Two French Ciphers (ca.1643) in English Archives", "url": "https://cryptiana.blogspot.com/2024/10/two-french-ciphers-ca1643-in-english.html", "published_at": "2024-10-14T00:13:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c0caecbfb", "title": "A Bundle of Ciphers of Lord Digby", "url": "https://cryptiana.blogspot.com/2024/10/a-bundle-of-ciphers-of-lord-digby.html", "published_at": "2024-10-13T01:49:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c0ce2492a", "title": "Chinese Enciphered Code Analyzed in Arlington Hall", "url": "https://cryptiana.blogspot.com/2024/10/chinese-enciphered-code-analyzed-in.html", "published_at": "2024-10-11T23:27:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c0d2e011c", "title": "How about a Puzzle in Latin?", "url": "https://cryptiana.blogspot.com/2024/10/how-about-puzzle-in-latin.html", "published_at": "2024-10-09T21:07:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c0d305dfa", "title": "An Early English Cipher Used by Cuthbert Tunstall (1517)", "url": "https://cryptiana.blogspot.com/2024/10/an-early-english-cipher-used-by.html", "published_at": "2024-10-09T13:57:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c0d8a3947", "title": "Two Syllabic Challenges (1653, 1654)", "url": "https://cryptiana.blogspot.com/2024/09/two-syllabic-challenges-1653-1654.html", "published_at": "2024-09-29T04:51:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c0dab52f6", "title": "The Prince of Condé's Cipher with his Agent in London", "url": "https://cryptiana.blogspot.com/2024/09/the-prince-of-cond-cipher-with-his.html", "published_at": "2024-09-28T10:39:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c0e8a62a4", "title": "A Syllabic Cipher of Cardinal Gualterio Reconstructed Manually", "url": "https://cryptiana.blogspot.com/2024/09/a-syllabic-cipher-of-cardinal-gualterio.html", "published_at": "2024-09-17T20:45:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c0f8582a5", "title": "Parliament's Ban on Ciphers during the English Civil War", "url": "https://cryptiana.blogspot.com/2024/09/parliaments-ban-on-ciphers-during.html", "published_at": "2024-09-01T20:20:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c1039e7dd", "title": "Duke of Nevers' Variable-Length Figure Cipher (1571)", "url": "https://cryptiana.blogspot.com/2024/09/duke-of-nevers-variable-length-figure.html", "published_at": "2024-08-31T21:21:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c107a93c5", "title": "A Second Copy of Music Cipher to Charles II Acquired by the British Library (ca.2018)", "url": "https://cryptiana.blogspot.com/2024/08/a-second-copy-of-music-cipher-to.html", "published_at": "2024-08-15T12:10:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c11619c4a", "title": "Use of Diacritics/Exponents/Vowel Indicators in Milanese Ciphers", "url": "https://cryptiana.blogspot.com/2024/08/use-of-diacriticsexponentsvowel.html", "published_at": "2024-08-13T21:50:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c1211cadd", "title": "Constantijn Huygens Jr.'s Secret in Simplistic Concealment Cipher", "url": "https://cryptiana.blogspot.com/2024/08/constantijn-huygens-jrs-secret-in.html", "published_at": "2024-08-12T20:32:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c12aed0ca", "title": "Codebreaker Constantijn Huygens", "url": "https://cryptiana.blogspot.com/2024/08/codebreaker-constantijn-huygens.html", "published_at": "2024-08-12T06:44:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c13746b06", "title": "A Second \"More Ample\" Babington Cipher", "url": "https://cryptiana.blogspot.com/2024/08/a-second-more-ample-babington-cipher.html", "published_at": "2024-08-10T20:50:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c13eec837", "title": "Codebreaker John Somer in the 1580s", "url": "https://cryptiana.blogspot.com/2024/08/codebreaker-john-somer-in-1580s.html", "published_at": "2024-08-09T22:02:00+00:00" }, { "id": "01a0c537-b92f-710c-a358-8c5c14da8b26", "title": "Bolton's Telegraph Code (1871) Adopted by Japanese Foreign Ministry", "url": "https://cryptiana.blogspot.com/2024/07/boltons-telegraph-code-1871-adopted-by.html", "published_at": "2024-07-22T11:15:00+00:00" }, { "id": "01a0c541-6126-7135-9164-5d88795e8d68", "title": "Three Unknown Chinese Codebooks (ca. 1905)", "url": "https://cryptiana.blogspot.com/2024/07/three-unknown-chinese-codebooks-ca-1905.html", "published_at": "2024-07-21T04:39:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae60cd5be50", "title": "Ciphertext-only Attack on Classical Ciphers by Using AI", "url": "https://cryptiana.blogspot.com/2024/07/ciphertext-only-attack-on-classical.html", "published_at": "2024-07-19T12:37:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae60cfbef75", "title": "Codebreaking with AI", "url": "https://cryptiana.blogspot.com/2024/07/codebreaking-with-ai.html", "published_at": "2024-07-12T21:39:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae60ddc6865", "title": "George Lasry's Paper on Syllabic Cipher Released", "url": "https://cryptiana.blogspot.com/2024/07/george-lasrys-paper-on-syllabic-cipher.html", "published_at": "2024-07-11T20:50:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae60ea73a6e", "title": "Reconstructed Ciphers related to Mary, Queen of Scots, preserved in Scottish Catholic Archives (SCA)", "url": "https://cryptiana.blogspot.com/2024/07/reconstructed-ciphers-related-to-mary.html", "published_at": "2024-07-03T20:09:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae60f6f191b", "title": "Early French Figure Ciphers", "url": "https://cryptiana.blogspot.com/2024/07/early-french-figure-ciphers.html", "published_at": "2024-07-03T12:31:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae61047fd3f", "title": "Cross-Cipher Errors - A New Modality of Communication Analysis", "url": "https://cryptiana.blogspot.com/2024/07/cross-cipher-errors-new-modality-of.html", "published_at": "2024-07-01T12:01:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae610d8bcc9", "title": "Some Updates on Correspondence between Philip II and Vargas Mexia", "url": "https://cryptiana.blogspot.com/2024/06/some-updates-on-correspondence-between.html", "published_at": "2024-06-23T13:40:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae610fe2e52", "title": "Early Japanese Syllabary Table in Milanese Archives", "url": "https://cryptiana.blogspot.com/2024/05/early-japanese-syllabary-table-in.html", "published_at": "2024-05-08T20:30:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae611164354", "title": "Korean Telegraphic Code", "url": "https://cryptiana.blogspot.com/2024/04/korean-telegraphic-code.html", "published_at": "2024-04-25T12:04:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae6117fe2d2", "title": "William Blencowe's \"Safest and Most Expeditious\" Cipher", "url": "https://cryptiana.blogspot.com/2024/03/william-blencowes-safest-and-most.html", "published_at": "2024-03-31T10:54:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae61205626b", "title": "Can a Lost Encoding Format be Recovered by Analysis?", "url": "https://cryptiana.blogspot.com/2024/03/can-lost-encoding-format-be-recovered.html", "published_at": "2024-03-28T10:23:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae6122d652f", "title": "Two More English Ciphers from the 1650s", "url": "https://cryptiana.blogspot.com/2024/03/two-more-english-ciphers-from-1650s.html", "published_at": "2024-03-26T20:20:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae61240acdb", "title": "J.F.W. Herschel's Cipher Puzzle", "url": "https://cryptiana.blogspot.com/2024/03/jfw-herschels-cipher-puzzle.html", "published_at": "2024-03-25T20:18:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae613210596", "title": "A Cipher between Emperor Charles V and Young Prince Philip (1545)", "url": "https://cryptiana.blogspot.com/2024/03/a-cipher-between-emperor-charles-v-and.html", "published_at": "2024-03-24T20:18:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae61384ab5f", "title": "Variable-length Figure Cipher Used by Gilbert Gifford?", "url": "https://cryptiana.blogspot.com/2024/03/variable-length-figure-cipher-used-by_24.html", "published_at": "2024-03-23T20:21:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae61461e116", "title": "Variable-length Figure Cipher used by Duke of Lorraine (ca.1620?)", "url": "https://cryptiana.blogspot.com/2024/03/variable-length-figure-cipher-used-by.html", "published_at": "2024-03-23T04:16:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae614794dce", "title": "Codebreaking of Sir Robert Southwell during the Popish Plot", "url": "https://cryptiana.blogspot.com/2024/03/codebreaking-of-sir-robert-southwell.html", "published_at": "2024-03-19T10:24:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae6153abde2", "title": "Duke of Ormond's Ciphers during the 1660s", "url": "https://cryptiana.blogspot.com/2024/03/duke-of-ormonds-ciphers-during-1660s.html", "published_at": "2024-03-17T12:45:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae616268f06", "title": "Cryptiana is now HTTPS-Enabled", "url": "https://cryptiana.blogspot.com/2024/03/cryptiana-is-now-https-enabled.html", "published_at": "2024-03-09T22:02:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae6162fdb5e", "title": "Ciphers Used in Letters of Oliver Cromwell, Henry Cromwell, and Others", "url": "https://cryptiana.blogspot.com/2024/03/ciphers-used-in-letters-of-oliver.html", "published_at": "2024-03-07T23:15:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae6172e622b", "title": "\"A new Book of Cyphers\" ... about Intertwined Initials", "url": "https://cryptiana.blogspot.com/2024/03/a-new-book-of-cyphers-about-intertwined.html", "published_at": "2024-03-01T21:59:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae617783f39", "title": "Ciphers between Mazarin and Abbe Fouquet", "url": "https://cryptiana.blogspot.com/2024/02/ciphers-between-mazarin-and-abbe-fouquet.html", "published_at": "2024-02-19T23:34:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae618013b48", "title": "Reading Scrolls Carbonized in Ancient Vesuvius Eruption without Unwrapping", "url": "https://cryptiana.blogspot.com/2024/02/reading-scrolls-carbonized-in-ancient.html", "published_at": "2024-02-11T04:36:00+00:00" }, { "id": "01a0c541-6127-7255-acab-3ae618815a4e", "title": "Encryption for Security of Satellites", "url": "https://cryptiana.blogspot.com/2024/02/encryption-for-security-of-satellites.html", "published_at": "2024-02-09T23:05:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84aff8659f", "title": "Japanese Cipher Machine Green (Not Japanese Enigma)", "url": "https://cryptiana.blogspot.com/2024/02/japanese-cipher-machine-green-not.html", "published_at": "2024-02-06T20:38:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b00031e9", "title": "Dutch Windmill Code?", "url": "https://cryptiana.blogspot.com/2024/02/dutch-windmill-code.html", "published_at": "2024-02-03T06:50:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b087f206", "title": "English Ciphers during the Restoration Period", "url": "https://cryptiana.blogspot.com/2024/02/english-ciphers-during-restoration.html", "published_at": "2024-02-02T09:47:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b08f9928", "title": "Preconcerted Code Words Used by Secretary of Mary, Queen of Scots", "url": "https://cryptiana.blogspot.com/2024/01/preconcerted-code-words-used-by.html", "published_at": "2024-01-28T21:04:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b0da16a4", "title": "What Code Was Used when Nisho Maru Oil Tanker Broke Blockade of the Royal Navy?", "url": "https://cryptiana.blogspot.com/2024/01/what-code-was-used-when-nisho-maru-oil.html", "published_at": "2024-01-28T08:48:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b142ba45", "title": "Mary Stuart's Ciphers in Papers of Earl of Moray", "url": "https://cryptiana.blogspot.com/2024/01/mary-stuarts-ciphers-in-papers-of-earl.html", "published_at": "2024-01-23T13:47:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b203a4d5", "title": "Venetian Ciphers with Superscripts in ASVe", "url": "https://cryptiana.blogspot.com/2024/01/venetian-ciphers-with-superscripts-in.html", "published_at": "2024-01-16T22:24:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b28d72cc", "title": "Specimens of Caselle Cipher", "url": "https://cryptiana.blogspot.com/2024/01/specimens-of-caselle-cipher.html", "published_at": "2024-01-14T23:12:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b38731b5", "title": "Double Reading Caused by Omission of Breaks", "url": "https://cryptiana.blogspot.com/2024/01/double-reading-caused-by-omission-of.html", "published_at": "2024-01-13T21:27:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b4076884", "title": "A Cipher of Margret of Austria?", "url": "https://cryptiana.blogspot.com/2024/01/a-cipher-of-margret-of-austria.html", "published_at": "2024-01-08T00:28:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b495e922", "title": "British Codebreakers' Keys of French Ciphers during the War of American Revolution", "url": "https://cryptiana.blogspot.com/2024/01/british-codebreakers-keys-of-french.html", "published_at": "2024-01-02T00:09:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b4c63ed9", "title": "Manifesto Printed in Secret for Uprising against the Shogunate", "url": "https://cryptiana.blogspot.com/2023/12/manifesto-printed-in-secret-for.html", "published_at": "2023-12-25T20:47:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b546c8f9", "title": "Hidden Message from a Scholar Inprisoned by the Shogunate", "url": "https://cryptiana.blogspot.com/2023/12/hidden-message-from-scholar-inprisoned.html", "published_at": "2023-12-24T20:32:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b63da2ce", "title": "Embedding Text in Text in Japanese Poetry", "url": "https://cryptiana.blogspot.com/2023/12/embedding-text-in-text-in-japanese.html", "published_at": "2023-12-23T22:38:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b69bd6d8", "title": "More Ciphers from BnF", "url": "https://cryptiana.blogspot.com/2023/12/more-ciphers-from-bnf.html", "published_at": "2023-12-07T12:11:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b7260159", "title": "A French Cipher Possibly from the Earliest Period: De la Tremoille's(?) Cipher", "url": "https://cryptiana.blogspot.com/2023/12/a-french-cipher-possibly-from-earliest.html", "published_at": "2023-12-05T23:48:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b79b1940", "title": "Earlier Specimen (1596) of Spanish Cipher Cp.57 Broken by François Viète", "url": "https://cryptiana.blogspot.com/2023/12/earlier-specimen-1596-of-spanish-cipher.html", "published_at": "2023-12-03T01:55:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b853e07c", "title": "15 Solutions to Undeciphered Texts in BnF by George Lasry", "url": "https://cryptiana.blogspot.com/2023/11/15-solutions-to-undeciphered-texts-in.html", "published_at": "2023-11-21T23:19:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b876857f", "title": "Did Ambassadors Learn Local Ciphers?", "url": "https://cryptiana.blogspot.com/2023/11/did-ambassadors-learn-local-ciphers.html", "published_at": "2023-11-02T20:28:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b8dfd247", "title": "OneDriveの同期を解除したらデスクトップのデータが全部消えた！…と思ったら残っていた件", "url": "https://cryptiana.blogspot.com/2023/10/onedrive.html", "published_at": "2023-10-28T00:49:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b9b2acde", "title": "Samuel Morland's \"New Method\" Used for Charles II's Ambassadors", "url": "https://cryptiana.blogspot.com/2023/10/samuel-morlands-new-method-used-for.html", "published_at": "2023-10-14T12:30:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84b9c96c79", "title": "Printed Templates during the Reign of Charles II", "url": "https://cryptiana.blogspot.com/2023/10/printed-templates-during-reign-of.html", "published_at": "2023-10-09T11:29:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84ba346f5b", "title": "The Babington Cipher", "url": "https://cryptiana.blogspot.com/2023/09/the-babington-cipher.html", "published_at": "2023-09-27T20:39:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84ba8cd8ea", "title": "A Cipher used between Marchioness of Ormonde and Edward Nicholas (1649)", "url": "https://cryptiana.blogspot.com/2023/09/a-cipher-used-between-marchioness-of.html", "published_at": "2023-09-25T23:48:00+00:00" }, { "id": "01a0c54a-6050-7192-958f-1f84bb3dae9d", "title": "Cipher Letters to Charles I of England (1645) in the Parliamentary Archives", "url": "https://cryptiana.blogspot.com/2023/09/cipher-letters-to-charles-i-of-england.html", "published_at": "2023-09-24T21:43:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd2e91bc8d", "title": "A Letter in Napoleonic Small Cipher found in Dresden", "url": "https://cryptiana.blogspot.com/2023/09/a-letter-in-napoleonic-small-cipher.html", "published_at": "2023-09-23T22:56:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd2f43983d", "title": "Inventory of Edward Nicholas' Ciphers in Egerton MS 2550", "url": "https://cryptiana.blogspot.com/2023/09/inventory-of-edward-nicholas-ciphers-in.html", "published_at": "2023-09-21T10:36:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd2f754042", "title": "Royalist Minister Edward Nicholas Studies Vigenere/Beaufort Cipher", "url": "https://cryptiana.blogspot.com/2023/09/royalist-minister-edward-nicholas.html", "published_at": "2023-09-20T11:52:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd2fa019f8", "title": "Three Ciphers of Nicholas Throckmorton Identified, Two Remain Unsolved", "url": "https://cryptiana.blogspot.com/2023/09/three-ciphers-of-nicholas-throckmorton.html", "published_at": "2023-09-17T21:07:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd2fe37ca6", "title": "A Telegram from Switzerland (1937)", "url": "https://cryptiana.blogspot.com/2023/09/a-telegram-from-switzerland-1937.html", "published_at": "2023-09-10T10:13:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd30e0c194", "title": "Excerpts of Nicholas Throckmorton's Cipher Letters (1559)", "url": "https://cryptiana.blogspot.com/2023/09/excerpts-of-nicholas-throckmortons.html", "published_at": "2023-09-07T11:34:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd3187826a", "title": "I Reconstructed a Cipher but Lost Its Source.", "url": "https://cryptiana.blogspot.com/2023/09/i-reconstructed-cipher-but-lost-its.html", "published_at": "2023-09-06T12:35:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd320be3b2", "title": "Simulated Paper-and-Pencil Codebreaking of a Ciphered Letter of Mary, Queen of Scots", "url": "https://cryptiana.blogspot.com/2023/08/simulated-paper-and-pencil-codebreaking.html", "published_at": "2023-08-24T10:44:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd322fd9be", "title": "An English Polyalphabetic Cipher from the Seventeenth Century", "url": "https://cryptiana.blogspot.com/2023/08/an-english-polyalphabetic-cipher-from.html", "published_at": "2023-08-12T22:03:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd32ee3c2f", "title": "\"Operational History of Japanese Naval Communications\"", "url": "https://cryptiana.blogspot.com/2023/08/operational-history-of-japanese-naval.html", "published_at": "2023-08-11T20:34:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd32fb1c64", "title": "(Nonsecret-)Coded Military Telegram of Imperial Japanese Army (1936)", "url": "https://cryptiana.blogspot.com/2023/08/nonsecret-coded-military-telegram-of.html", "published_at": "2023-08-11T00:24:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd33d41bbe", "title": "A Cipher Letter to Henry VII from John Stile", "url": "https://cryptiana.blogspot.com/2023/08/a-cipher-letter-to-henry-vii-from-john.html", "published_at": "2023-08-04T12:47:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd3422671e", "title": "Ciphers of John Stile and Thomas Spinelly (1510s)", "url": "https://cryptiana.blogspot.com/2023/08/ciphers-of-john-stile-and-thomas.html", "published_at": "2023-07-31T23:44:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd34cc7382", "title": "A Cipher of Catherine de Medicis' Agent", "url": "https://cryptiana.blogspot.com/2023/07/a-cipher-of-catherine-de-medicis-agent.html", "published_at": "2023-07-31T12:06:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd3590768f", "title": "American Peace Commissioners' Instructions Coded for Franklin", "url": "https://cryptiana.blogspot.com/2023/07/american-peace-commissioners.html", "published_at": "2023-07-20T21:40:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd36051dc2", "title": "Some Links to Papers of Continental Congress (PCC)", "url": "https://cryptiana.blogspot.com/2023/07/some-links-to-papers-of-continental.html", "published_at": "2023-07-18T13:00:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd36c3abfa", "title": "Two More Enciphered Letters of Mary, Queen of Scots", "url": "https://cryptiana.blogspot.com/2023/07/two-more-enciphered-letters-of-mary.html", "published_at": "2023-07-16T21:26:00+00:00" }, { "id": "01a0c552-b8f9-72d4-bd23-5afd37b6bbc8", "title": "Agostino Amadi's Treatise on Cipher", "url": "https://cryptiana.blogspot.com/2023/07/agostino-amadis-treatise-on-cipher.html", "published_at": "2023-07-09T20:20:00+00:00" } ] posts Claim your 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2025

Substitution Cipher in Hangul original ↗

13 Feb 2025

Yardley's Codebreaking of a Chinese Book Cipher (1939)original ↗

9 Feb 2025

Yardley's "Device" to Convey a Secret Message under an Ostensible Plaintext?original ↗

8 Feb 2025

Secret Chinese Codebooks Preserved in US original ↗

3 Feb 2025

Undeciphered Letters of Richelieu and Mazarin original ↗

2 Feb 2025

Variable-length Figure Cipher between Henry de la Tour and Duke of Nevers (1589, 1591)original ↗

2 Feb 2025

French Code at the time of Peace Talk at Geertruidenberg (1710)original ↗

31 Jan 2025

French Diplomatic Code Shortly before the Peace of Rijswijk (1694)original ↗

26 Jan 2025

2024

Instructions for Code Switching in a Set of Codes in English (1792)original ↗

1 Dec 2024

Codebreaking without Command of the Language original ↗

1 Nov 2024

Japanese Edition of Codebreaking: A Practical Guide by Elonka Dunin and Klaus Schmeh original ↗

31 Oct 2024

A Great Cipher Left Undeciphered by William Blencowe original ↗

26 Oct 2024

Frederick I of Prussia's Transposition Cipher original ↗

25 Oct 2024

Cardinal Richelieu Used a Porta-like Pairing Cipher?original ↗

24 Oct 2024

Some Ciphers from Henry IV's Time original ↗

19 Oct 2024

Two French Ciphers (ca.1643) in English Archives original ↗

14 Oct 2024

A Bundle of Ciphers of Lord Digby original ↗

13 Oct 2024

Chinese Enciphered Code Analyzed in Arlington Hall original ↗

11 Oct 2024

How about a Puzzle in Latin?original ↗

9 Oct 2024

An Early English Cipher Used by Cuthbert Tunstall (1517)original ↗

9 Oct 2024

Two Syllabic Challenges (1653, 1654)original ↗

29 Sept 2024

The Prince of Condé's Cipher with his Agent in London original ↗

28 Sept 2024

A Syllabic Cipher of Cardinal Gualterio Reconstructed Manually original ↗

17 Sept 2024

Parliament's Ban on Ciphers during the English Civil War original ↗

1 Sept 2024

Duke of Nevers' Variable-Length Figure Cipher (1571)original ↗

31 Aug 2024

A Second Copy of Music Cipher to Charles II Acquired by the British Library (ca.2018)original ↗

15 Aug 2024

Use of Diacritics/Exponents/Vowel Indicators in Milanese Ciphers original ↗

13 Aug 2024

Constantijn Huygens Jr.'s Secret in Simplistic Concealment Cipher original ↗

12 Aug 2024

Codebreaker Constantijn Huygens original ↗

12 Aug 2024

A Second "More Ample" Babington Cipher original ↗

10 Aug 2024

Codebreaker John Somer in the 1580s original ↗

9 Aug 2024

Bolton's Telegraph Code (1871) Adopted by Japanese Foreign Ministry original ↗

22 Jul 2024

Three Unknown Chinese Codebooks (ca. 1905)original ↗

21 Jul 2024

Ciphertext-only Attack on Classical Ciphers by Using AI original ↗

19 Jul 2024

Codebreaking with AI original ↗

12 Jul 2024

George Lasry's Paper on Syllabic Cipher Released original ↗

11 Jul 2024

Reconstructed Ciphers related to Mary, Queen of Scots, preserved in Scottish Catholic Archives (SCA)original ↗

3 Jul 2024

Early French Figure Ciphers original ↗

3 Jul 2024

Cross-Cipher Errors - A New Modality of Communication Analysis original ↗

1 Jul 2024

Some Updates on Correspondence between Philip II and Vargas Mexia original ↗

23 Jun 2024

Early Japanese Syllabary Table in Milanese Archives original ↗

8 May 2024

Korean Telegraphic Code original ↗

25 Apr 2024

William Blencowe's "Safest and Most Expeditious" Cipher original ↗

31 Mar 2024

Can a Lost Encoding Format be Recovered by Analysis?original ↗

28 Mar 2024

Two More English Ciphers from the 1650s original ↗

26 Mar 2024

J.F.W. Herschel's Cipher Puzzle original ↗

25 Mar 2024

A Cipher between Emperor Charles V and Young Prince Philip (1545)original ↗

24 Mar 2024

Variable-length Figure Cipher Used by Gilbert Gifford?original ↗

23 Mar 2024

Variable-length Figure Cipher used by Duke of Lorraine (ca.1620?)original ↗

23 Mar 2024

Codebreaking of Sir Robert Southwell during the Popish Plot original ↗

19 Mar 2024

Duke of Ormond's Ciphers during the 1660s original ↗

17 Mar 2024

Cryptiana is now HTTPS-Enabled original ↗

9 Mar 2024

Ciphers Used in Letters of Oliver Cromwell, Henry Cromwell, and Others original ↗

7 Mar 2024

"A new Book of Cyphers" ... about Intertwined Initials original ↗

1 Mar 2024

Ciphers between Mazarin and Abbe Fouquet original ↗

19 Feb 2024

Reading Scrolls Carbonized in Ancient Vesuvius Eruption without Unwrapping original ↗

11 Feb 2024

Encryption for Security of Satellites original ↗

9 Feb 2024

Japanese Cipher Machine Green (Not Japanese Enigma)original ↗

6 Feb 2024

Dutch Windmill Code?original ↗

3 Feb 2024

English Ciphers during the Restoration Period original ↗

2 Feb 2024

Preconcerted Code Words Used by Secretary of Mary, Queen of Scots original ↗

28 Jan 2024

What Code Was Used when Nisho Maru Oil Tanker Broke Blockade of the Royal Navy?original ↗

28 Jan 2024

Mary Stuart's Ciphers in Papers of Earl of Moray original ↗

23 Jan 2024

Venetian Ciphers with Superscripts in ASVe original ↗

16 Jan 2024

Specimens of Caselle Cipher original ↗

14 Jan 2024

Double Reading Caused by Omission of Breaks original ↗

13 Jan 2024

A Cipher of Margret of Austria?original ↗

8 Jan 2024

British Codebreakers' Keys of French Ciphers during the War of American Revolution original ↗

2 Jan 2024

2023

Manifesto Printed in Secret for Uprising against the Shogunate original ↗

25 Dec 2023

Hidden Message from a Scholar Inprisoned by the Shogunate original ↗

24 Dec 2023

Embedding Text in Text in Japanese Poetry original ↗

23 Dec 2023

More Ciphers from BnF original ↗

7 Dec 2023

A French Cipher Possibly from the Earliest Period: De la Tremoille's(?) Cipher original ↗

5 Dec 2023

Earlier Specimen (1596) of Spanish Cipher Cp.57 Broken by François Viète original ↗

3 Dec 2023

15 Solutions to Undeciphered Texts in BnF by George Lasry original ↗

21 Nov 2023

Did Ambassadors Learn Local Ciphers?original ↗

2 Nov 2023

OneDriveの同期を解除したらデスクトップのデータが全部消えた！…と思ったら残っていた件 original ↗

28 Oct 2023

Samuel Morland's "New Method" Used for Charles II's Ambassadors original ↗

14 Oct 2023

Printed Templates during the Reign of Charles II original ↗

9 Oct 2023

The Babington Cipher original ↗

27 Sept 2023

A Cipher used between Marchioness of Ormonde and Edward Nicholas (1649)original ↗

25 Sept 2023

Cipher Letters to Charles I of England (1645) in the Parliamentary Archives original ↗

24 Sept 2023

A Letter in Napoleonic Small Cipher found in Dresden original ↗

23 Sept 2023

Inventory of Edward Nicholas' Ciphers in Egerton MS 2550 original ↗

21 Sept 2023

Royalist Minister Edward Nicholas Studies Vigenere/Beaufort Cipher original ↗

20 Sept 2023

Three Ciphers of Nicholas Throckmorton Identified, Two Remain Unsolved original ↗

17 Sept 2023

A Telegram from Switzerland (1937)original ↗

10 Sept 2023

Excerpts of Nicholas Throckmorton's Cipher Letters (1559)original ↗

7 Sept 2023

I Reconstructed a Cipher but Lost Its Source.original ↗

6 Sept 2023

Simulated Paper-and-Pencil Codebreaking of a Ciphered Letter of Mary, Queen of Scots original ↗

24 Aug 2023

An English Polyalphabetic Cipher from the Seventeenth Century original ↗

12 Aug 2023

"Operational History of Japanese Naval Communications"original ↗

11 Aug 2023

(Nonsecret-)Coded Military Telegram of Imperial Japanese Army (1936)original ↗

11 Aug 2023

A Cipher Letter to Henry VII from John Stile original ↗

4 Aug 2023

Ciphers of John Stile and Thomas Spinelly (1510s)original ↗

31 Jul 2023

A Cipher of Catherine de Medicis' Agent original ↗

31 Jul 2023

American Peace Commissioners' Instructions Coded for Franklin original ↗

20 Jul 2023

Some Links to Papers of Continental Congress (PCC)original ↗

18 Jul 2023

Two More Enciphered Letters of Mary, Queen of Scots original ↗

16 Jul 2023

Agostino Amadi's Treatise on Cipher original ↗

9 Jul 2023