corpus.blog
56,966 blogs · [ { "id": "01a0e745-3c77-717f-9f53-3bf0f0087f98", "title": "Walsingham's Pigpen Cipher (1586-1587)", "url": "https://cryptiana.blogspot.com/2026/09/walsinghams-pigpen-cipher-1586-1587.html", "published_at": "2026-09-27T22:48:16+00:00" }, { "id": "01a0e745-3c77-717f-9f53-3bf0f1032830", "title": "A Numerical Cipher in an Italian Letter to Francis I (1530)", "url": "https://cryptiana.blogspot.com/2026/09/a-numerical-cipher-in-italian-letter-to.html", "published_at": "2026-09-27T12:26:45+00:00" }, { "id": "01a0e745-3c77-717f-9f53-3bf0f103cbf4", "title": "A Cipher between Louise of Savoy and Nicolas Raince (1525)", "url": "https://cryptiana.blogspot.com/2026/09/a-cipher-between-louise-of-savoy-and.html", "published_at": "2026-09-26T05:26:04+00:00" }, { "id": "01a0d7c2-1e72-7054-b8b9-a379b46dbe53", "title": "Use of Cipher in Cardinal Schiner's Letter to Henry VIII (1516)", "url": "https://cryptiana.blogspot.com/2026/09/use-of-cipher-in-cardinal-schiners.html", "published_at": "2026-09-24T20:12:58+00:00" }, { "id": "01a0d7c2-1e72-7054-b8b9-a379b565fe33", "title": "Three Ciphers between Adrian of Utrecht and Charles V (1520-1523)", "url": "https://cryptiana.blogspot.com/2026/09/three-ciphers-between-adrian-of-utrecht.html", "published_at": "2026-09-23T20:46:46+00:00" }, { "id": "01a0d7c2-1e72-7054-b8b9-a379b5b0d191", "title": "Many Telegrams Related to Sun Yat-sen in Japanese Archives Deciphered", "url": "https://cryptiana.blogspot.com/2026/09/many-telegrams-related-to-sun-yat-sen.html", "published_at": "2026-09-23T04:16:37+00:00" }, { "id": "01a0d7c2-1e72-7054-b8b9-a379b61b07f5", "title": "Solutions of Ciphers in a Continuous Digit Stream", "url": "https://cryptiana.blogspot.com/2026/09/solutions-of-ciphers-in-continuous.html", "published_at": "2026-09-22T11:15:23+00:00" }, { "id": "01a0c504-d1d0-7215-8b21-e093c621c7a4", "title": "Bishop of Worcester's Latin Cipher with Superscripts Reconstructed from Decipherment in Print", "url": "https://cryptiana.blogspot.com/2026/09/bishop-of-worcesters-latin-cipher-with.html", "published_at": "2026-09-20T20:42:06+00:00" }, { "id": "01a0c504-d1d0-7215-8b21-e093c642d7ab", "title": "Two Diplomatic Ciphers of Marquis de Villars (1669, 1671)", "url": "https://cryptiana.blogspot.com/2026/09/two-diplomatic-ciphers-of-marquis-de.html", "published_at": "2026-09-20T02:24:21+00:00" }, { "id": "01a0c504-d1d0-7215-8b21-e093c6d6a734", "title": "Louvois' Petit Chiffre (1690-1691) Solved", "url": "https://cryptiana.blogspot.com/2026/09/louvois-petit-chiffre-1690-1691-solved.html", "published_at": "2026-09-19T03:18:43+00:00" }, { "id": "01a0c504-d1d0-7215-8b21-e093c7439a9d", "title": "Two Chinese Cipher Telegrams (1916) Solved", "url": "https://cryptiana.blogspot.com/2026/09/two-chinese-cipher-telegrams-1916-solved.html", "published_at": "2026-09-18T12:44:33+00:00" }, { "id": "01a0b0bb-65b2-7124-b429-727fa26eaab5", "title": "Solution of a Syllabic Cipher (Le Tellier-Castelnau Cipher, 1657)", "url": "https://cryptiana.blogspot.com/2026/09/solution-of-syllabic-cipher-le-tellier.html", "published_at": "2026-09-17T14:16:39+00:00" }, { "id": "01a094e9-9fbf-70dc-a678-96dc644af062", "title": "Protecting Authenticity of Documents against Breaking of Encryption Scheme by Quantum Computing", "url": "https://cryptiana.blogspot.com/2026/09/protecting-authenticity-of-documents.html", "published_at": "2026-09-11T23:38:02+00:00" }, { "id": "01a08765-1812-7293-850f-d6c855c582ed", "title": "Wellington's Code/Cipher during the Peninsular War", "url": "https://cryptiana.blogspot.com/2026/09/wellingtons-codecipher-during.html", "published_at": "2026-09-08T12:19:29+00:00" }, { "id": "01a08765-1812-7293-850f-d6c8563c40e9", "title": "Route Transposition Ciphers during the US Civil War Solved by using AI", "url": "https://cryptiana.blogspot.com/2026/09/route-transposition-ciphers-during-us.html", "published_at": "2026-09-06T05:03:06+00:00" }, { "id": "01a08765-1812-7293-850f-d6c8570df12e", "title": "US Codebreaking Activities in Tokyo during the Korean War", "url": "https://cryptiana.blogspot.com/2026/08/us-codebreaking-activities-in-tokyo.html", "published_at": "2026-08-16T03:39:15+00:00" }, { "id": "01a08765-1812-7293-850f-d6c8579b8c9f", "title": "How Long Does It Take to Decipher a Despatch?", "url": "https://cryptiana.blogspot.com/2026/08/how-long-does-it-take-to-decipher.html", "published_at": "2026-08-09T22:21:22+00:00" }, { "id": "01a08765-1812-7293-850f-d6c858126d3e", "title": "Mirabeau's Cipher", "url": "https://cryptiana.blogspot.com/2026/07/mirabeaus-cipher.html", "published_at": "2026-07-26T08:55:12+00:00" }, { "id": "01a08765-1812-7293-850f-d6c8586b4323", "title": "A \"Coded\" Message from a Tang General to a Korean General", "url": "https://cryptiana.blogspot.com/2026/07/a-coded-message-from-tang-general-to.html", "published_at": "2026-07-23T20:29:51+00:00" }, { "id": "01a08765-1812-7293-850f-d6c85944cbe3", "title": "Update on Korean Ciphers", "url": "https://cryptiana.blogspot.com/2026/07/update-on-korean-ciphers.html", "published_at": "2026-07-22T23:05:36+00:00" }, { "id": "01a08765-1812-7293-850f-d6c859759c86", "title": "Mirabeau's Undecoded Letter (1787)", "url": "https://cryptiana.blogspot.com/2026/07/mirabeaus-undecoded-letter-1787.html", "published_at": "2026-07-13T19:37:53+00:00" }, { "id": "01a08765-1812-7293-850f-d6c859c614a8", "title": "Spanich Decryption of Claude Blatier's letter (1582)", "url": "https://cryptiana.blogspot.com/2026/07/spanich-decryption-of-claude-blatiers.html", "published_at": "2026-07-12T20:43:56+00:00" }, { "id": "01a08765-1812-7293-850f-d6c85a55868a", "title": "Ciphers in the Archives of French Foreign Ministry", "url": "https://cryptiana.blogspot.com/2026/07/ciphers-in-archives-of-french-foreign.html", "published_at": "2026-07-12T11:01:37+00:00" }, { "id": "01a08765-1812-7293-850f-d6c85ab09235", "title": "Earliest French Ciphers (1507, 1513, 1521)", "url": "https://cryptiana.blogspot.com/2026/07/earliest-french-ciphers-1507-1513-1521.html", "published_at": "2026-07-11T12:10:23+00:00" }, { "id": "01a08765-1812-7293-850f-d6c85ab328c1", "title": "Heavy-Null Cipher Challenge", "url": "https://cryptiana.blogspot.com/2026/07/heavy-null-cipher-challenge.html", "published_at": "2026-07-09T10:21:10+00:00" }, { "id": "01a08765-1812-7293-850f-d6c85b142e30", "title": "Heavy Use of Nulls in Henry of Navarre's Cipher (1586)", "url": "https://cryptiana.blogspot.com/2026/07/heavy-use-of-nulls-in-henry-of-navarres.html", "published_at": "2026-07-06T05:47:22+00:00" }, { "id": "01a08765-1812-7293-850f-d6c85b6a1c54", "title": "Ciphering Errors of Elizabeth Stuart, Queen of Bohemia", "url": "https://cryptiana.blogspot.com/2026/07/ciphering-errors-of-elizabeth-stuart.html", "published_at": "2026-07-03T13:54:50+00:00" }, { "id": "01a08765-1812-7293-850f-d6c85c26f546", "title": "Sittler's Commercial Codebook Used for Dutch Diplomatic Service", "url": "https://cryptiana.blogspot.com/2026/06/sittlers-commercial-codebook-used-for.html", "published_at": "2026-06-27T21:15:09+00:00" }, { "id": "01a08765-1812-7293-850f-d6c85cc909ad", "title": "What Happened to Code when France was Occupied by Nazi Germany?", "url": "https://cryptiana.blogspot.com/2026/06/what-happened-to-code-when-france-was.html", "published_at": "2026-06-27T11:17:23+00:00" }, { "id": "01a08765-1812-7293-850f-d6c85d7215c8", "title": "Issues with Recent \"Solution\" of Zodiac Z13", "url": "https://cryptiana.blogspot.com/2026/06/issues-with-recent-solution-of-zodiac.html", "published_at": "2026-06-25T20:59:24+00:00" }, { "id": "01a08765-1812-7293-850f-d6c85dac3b6f", "title": "A Pigpen Cipher of Philip II's Agent (1577)", "url": "https://cryptiana.blogspot.com/2026/06/a-pigpen-cipher-of-philip-iis-agent-1577.html", "published_at": "2026-06-13T11:37:56+00:00" }, { "id": "01a08765-1812-7293-850f-d6c85dd63b62", "title": "A Match Wanted for Another Cipher to Emperor Charles V", "url": "https://cryptiana.blogspot.com/2026/06/a-match-wanted-for-another-cipher-to.html", "published_at": "2026-06-07T23:04:22+00:00" }, { "id": "01a08765-1812-7293-850f-d6c85e89dd0f", "title": "Undecoded Armstrong's Letter (1808) Sent to Madison by Mistake", "url": "https://cryptiana.blogspot.com/2026/06/undecoded-armstrongs-letter-1808-sent.html", "published_at": "2026-06-04T12:33:59+00:00" }, { "id": "01a08765-1812-7293-850f-d6c85f69e913", "title": "Yet More Ciphers from Emperor Charles V's Time", "url": "https://cryptiana.blogspot.com/2026/05/yet-more-ciphers-from-emperor-charles.html", "published_at": "2026-05-29T14:13:36+00:00" }, { "id": "01a08765-1812-7293-850f-d6c8603ab46a", "title": "A French Diplomatic Code from 1748", "url": "https://cryptiana.blogspot.com/2026/05/a-french-diplomatic-code-from-1748.html", "published_at": "2026-05-16T02:29:45+00:00" }, { "id": "01a08765-1812-7293-850f-d6c8609f4c8c", "title": "Full Decipherment of Pedro de Ayala's Letter to Ferdinand and Isabella (1498)", "url": "https://cryptiana.blogspot.com/2026/04/full-decipherment-of-pedro-de-ayalas.html", "published_at": "2026-04-28T21:12:32+00:00" }, { "id": "01a08765-1812-7293-850f-d6c8612994ad", "title": "Extending the Key of Barbeu-Dubourg's Passage Cipher with Franklin", "url": "https://cryptiana.blogspot.com/2026/04/extending-key-of-barbeu-dubourgs.html", "published_at": "2026-04-27T20:08:00+00:00" }, { "id": "01a08765-1812-7293-850f-d6c8616fe307", "title": "A British Book Cipher during the American Revolutionary War", "url": "https://cryptiana.blogspot.com/2026/04/a-british-book-cipher-during-american.html", "published_at": "2026-04-26T22:15:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfba966b54c", "title": "An Essay on Spanish Ciphers by 19th Century Archivist at Simancas", "url": "https://cryptiana.blogspot.com/2026/04/an-essay-on-spanish-ciphers-by-19th.html", "published_at": "2026-04-17T13:56:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbaa4d632e", "title": "Two More Ciphers of Emperor Charles V in 1527 Identified", "url": "https://cryptiana.blogspot.com/2026/04/two-more-ciphers-of-emperor-charles-v.html", "published_at": "2026-04-15T11:10:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbab28be1d", "title": "Can You Find a Match from a List of Ciphers of Charles V?", "url": "https://cryptiana.blogspot.com/2026/04/can-you-find-match-from-list-of-ciphers.html", "published_at": "2026-04-07T23:34:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbab967910", "title": "Recent Studies on Ciphers in the Reign of Emperor Charles V", "url": "https://cryptiana.blogspot.com/2026/04/recent-studies-on-ciphers-in-reign-of.html", "published_at": "2026-04-06T20:32:14+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbaba3ebff", "title": "A Code of Count of Maurepas, Secretary of State of the Navy (1733)", "url": "https://cryptiana.blogspot.com/2026/03/a-code-of-count-of-maurepas-secretary.html", "published_at": "2026-03-22T20:40:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbac11ef03", "title": "A Power from Prince Philip Arrived in Cipher (1554)", "url": "https://cryptiana.blogspot.com/2026/03/a-power-from-prince-philip-arrived-in.html", "published_at": "2026-03-21T23:53:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbac3c080b", "title": "Three Ciphers Used in Correspondence between Granvelle and Simon Renard", "url": "https://cryptiana.blogspot.com/2026/03/three-ciphers-used-in-correspondence.html", "published_at": "2026-03-20T21:08:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbac9c7f4e", "title": "A Cipher Used by Margaret of Austria (1508) (Not Properly Scanned)", "url": "https://cryptiana.blogspot.com/2026/03/a-cipher-used-by-margaret-of-austria.html", "published_at": "2026-03-19T21:30:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbacf0f034", "title": "A Cipher Used by Mary of Austria (1546)", "url": "https://cryptiana.blogspot.com/2026/03/a-cipher-used-by-mary-of-austria-1546.html", "published_at": "2026-03-18T11:12:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbacf9e415", "title": "An Undeciphered Letter from Henrietta Maria (1648)?", "url": "https://cryptiana.blogspot.com/2026/03/an-undeciphered-letter-from-henrietta.html", "published_at": "2026-03-17T10:51:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbad0aca7a", "title": "An Imperial Diplomat Resists Updating Ciphers (1646)", "url": "https://cryptiana.blogspot.com/2026/03/an-imperial-diplomat-resists-updating.html", "published_at": "2026-03-16T11:16:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbae017581", "title": "French Ciphers for German Affairs", "url": "https://cryptiana.blogspot.com/2026/03/french-ciphers-for-german-affairs.html", "published_at": "2026-03-14T22:35:16+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbaefc2e7f", "title": "French Numerical Ciphers from the 1570s", "url": "https://cryptiana.blogspot.com/2026/03/french-numerical-ciphers-from-1570s.html", "published_at": "2026-03-10T20:36:25+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbafaaf2b7", "title": "Reconstruction of a Cipher used by Charles de Danzay, French Ambassador to Denmark", "url": "https://cryptiana.blogspot.com/2026/02/reconstruction-of-cipher-used-by.html", "published_at": "2026-02-22T13:17:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbb033a1ed", "title": "Vigenere's Cipher That Allows Two Readings", "url": "https://cryptiana.blogspot.com/2026/02/vigeneres-cipher-that-allows-two.html", "published_at": "2026-02-18T23:18:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbb0f94596", "title": "Factor Exponent Cipher (from TV Series \"Hard Nuts\")", "url": "https://cryptiana.blogspot.com/2026/02/factor-exponent-cipher-from-tv-series.html", "published_at": "2026-02-11T00:13:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbb10b5e6d", "title": "Solution of My Running Key Challenge", "url": "https://cryptiana.blogspot.com/2026/02/solution-of-my-running-key-challenge.html", "published_at": "2026-02-07T01:45:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbb1723a05", "title": "A Memoire of a Japanese Crypto-Operator during WWII", "url": "https://cryptiana.blogspot.com/2026/02/a-memoire-of-japanese-crypto-operator.html", "published_at": "2026-02-03T20:50:00+00:00" }, { "id": "01a0c516-9f31-73dc-a088-ecfbb25a6e74", "title": "Running Key Challenge", "url": "https://cryptiana.blogspot.com/2026/02/running-key-challenge.html", "published_at": "2026-02-01T03:48:01+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237b3922a43", "title": "\"Harvest Now, Decrypt Later\" Requires Protective Measures before Q-Day", "url": "https://cryptiana.blogspot.com/2026/01/harvest-now-decrypt-later-requires.html", "published_at": "2026-01-31T09:35:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237b43b2c8b", "title": "Vigenere's Description of Scytale Not as a Transposition Cipher", "url": "https://cryptiana.blogspot.com/2026/01/vigeneres-description-of-scytale-not-as.html", "published_at": "2026-01-28T08:01:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237b4d8f8ab", "title": "Prince of Condé's Simple Substitution Cipher (1792-1800)", "url": "https://cryptiana.blogspot.com/2026/01/prince-of-condes-simple-substitution.html", "published_at": "2026-01-26T10:45:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237b55e58e7", "title": "K4 Kryptos Secret Sold for Nearly a Million Dollars", "url": "https://cryptiana.blogspot.com/2025/11/k4-kryptos-secret-sold-for-nearly.html", "published_at": "2025-11-22T09:04:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237b633072f", "title": "Decoding Armstrong's Letter: Help Wanted for Madison Papers", "url": "https://cryptiana.blogspot.com/2025/10/decoding-armstrongs-letter-help-wanted.html", "published_at": "2025-10-22T13:05:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237b6f4d194", "title": "An Undeciphered Letter of Le Tellier to a General in Flanders (1657)", "url": "https://cryptiana.blogspot.com/2025/10/an-undeciphered-letter-of-le-tellier-to.html", "published_at": "2025-10-20T12:41:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237b7f25bf0", "title": "Reconstruction of a Venetian Cipher (1552)", "url": "https://cryptiana.blogspot.com/2025/10/reconstruction-of-venetian-cipher-1552.html", "published_at": "2025-10-17T12:22:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237b8333074", "title": "\"Deciphering Mary Stuart's lost letters from 1578-1584\" is available as Open Access", "url": "https://cryptiana.blogspot.com/2025/10/deciphering-mary-stuarts-lost-letters.html", "published_at": "2025-10-16T12:36:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237b900d20d", "title": "Telegraph Operator Leaked Union Commander's Name in US Civil War?", "url": "https://cryptiana.blogspot.com/2025/10/telegraph-operator-leaked-union.html", "published_at": "2025-10-10T12:32:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237b9803c7c", "title": "Emperor Charles VI", "url": "https://cryptiana.blogspot.com/2025/10/emperor-charles-vi.html", "published_at": "2025-10-05T20:33:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237b986dacf", "title": "Emperor Maximilian II's Cipher Letters", "url": "https://cryptiana.blogspot.com/2025/10/emperor-maximilian-iis-cipher-letters.html", "published_at": "2025-10-04T21:02:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237ba7453d8", "title": "My Profile", "url": "https://cryptiana.blogspot.com/2025/10/my-profile.html", "published_at": "2025-10-04T01:23:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237ba7794a7", "title": "A Substitution Cipher in Chinese for Kids", "url": "https://cryptiana.blogspot.com/2025/10/a-substitution-cipher-in-chinese-for.html", "published_at": "2025-10-01T20:35:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237bb243fb3", "title": "Coded Letters of Admiral D'Estaing (1779) and Marshal Berthier (1812) Transcribed", "url": "https://cryptiana.blogspot.com/2025/10/coded-letters-of-admiral-destaing-1779.html", "published_at": "2025-09-30T23:00:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237bc1d7c22", "title": "Correspondence between Charles Babbage and Historian Everett Green", "url": "https://cryptiana.blogspot.com/2025/09/correspondence-between-charles-babbage.html", "published_at": "2025-09-29T21:08:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237bcf4519b", "title": "Solution of William Perwich's Transposition Cipher (2/2)", "url": "https://cryptiana.blogspot.com/2025/09/solution-of-william-perwichs_29.html", "published_at": "2025-09-28T21:36:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237bd11bbc8", "title": "Solution of William Perwich's Transposition Cipher (1/2)", "url": "https://cryptiana.blogspot.com/2025/09/solution-of-william-perwichs.html", "published_at": "2025-09-28T21:33:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237bd5623c0", "title": "A Wish to End Hunger from Wartime Experience in a Crypto Unit of the Author of Anpanman", "url": "https://cryptiana.blogspot.com/2025/09/a-wish-to-end-hunger-from-wartime.html", "published_at": "2025-09-20T20:55:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237be4866bb", "title": "Correspondence between Emperor Ferdinand III and Governor of the Spanish Netherlands (1634, 1635, 1640)", "url": "https://cryptiana.blogspot.com/2025/09/correspondence-between-emperor.html", "published_at": "2025-09-19T22:28:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237beefbe9b", "title": "An Undeciphered Transposition Cipher of William Perwich, an English Agent in Paris (1670)", "url": "https://cryptiana.blogspot.com/2025/09/an-undeciphered-transposition-cipher-of.html", "published_at": "2025-09-19T09:33:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237bf4dd289", "title": "Variable-length Numerical Code in Austrian Archives", "url": "https://cryptiana.blogspot.com/2025/09/variable-length-numerical-code-in.html", "published_at": "2025-09-17T20:32:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237bf59a2cd", "title": "A French TV Documentary on the Codebreaking of Mary Stuart's Letters Premiered in Paris", "url": "https://cryptiana.blogspot.com/2025/09/a-french-tv-documentary-on-codebreaking.html", "published_at": "2025-09-17T13:52:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237bfcb2fdc", "title": "Cipher of Imperial Ambassador Juan Perez (1527)", "url": "https://cryptiana.blogspot.com/2025/09/cipher-of-imperial-ambassador-juan.html", "published_at": "2025-09-09T20:33:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237c0398533", "title": "Correspondence of Imperial Ambassador Juan Manuel (1522)", "url": "https://cryptiana.blogspot.com/2025/09/correspondence-of-imperial-ambassador_9.html", "published_at": "2025-09-08T21:07:00+00:00" }, { "id": "01a0c521-86a0-71ac-b60c-d237c0dac5f2", "title": "Correspondence of Imperial Ambassador Alonzo Sanchez (1522)", "url": "https://cryptiana.blogspot.com/2025/09/correspondence-of-imperial-ambassador.html", "published_at": "2025-09-05T23:15:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb07ba6cd", "title": "Can a Vigenere Cipher be Broken without Key Repetition?", "url": "https://cryptiana.blogspot.com/2025/08/can-vigenere-cipher-be-broken-without.html", "published_at": "2025-08-30T10:25:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb0ac1a31", "title": "A Florentine Polyalphabetic Cipher from the 1480s", "url": "https://cryptiana.blogspot.com/2025/08/a-florentine-polyalphabetic-cipher-from.html", "published_at": "2025-08-28T10:34:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb16a2b29", "title": "Japanese Cipher Disks during the Meiji Period", "url": "https://cryptiana.blogspot.com/2025/08/japanese-cipher-disks-during-meiji.html", "published_at": "2025-08-18T13:16:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb1da3779", "title": "Real Messages Encrypted by Japanese RED Machine", "url": "https://cryptiana.blogspot.com/2025/08/real-messages-encrypted-by-japanese-red.html", "published_at": "2025-08-17T03:35:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb217d3a0", "title": "\"Cipher Disk\" before Alberti", "url": "https://cryptiana.blogspot.com/2025/08/cipher-disk-before-alberti.html", "published_at": "2025-08-11T06:43:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb27ae50e", "title": "An Original French Naval Code (1778)", "url": "https://cryptiana.blogspot.com/2025/07/an-original-french-naval-code-1778.html", "published_at": "2025-07-14T11:58:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb3090452", "title": "Tuple Ciphers (Enciphering a letter with two letters)", "url": "https://cryptiana.blogspot.com/2025/07/tuple-ciphers-enciphering-letter-with.html", "published_at": "2025-07-12T20:32:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb3de6334", "title": "Dutch Codebreaking Activities during WWI", "url": "https://cryptiana.blogspot.com/2025/07/dutch-codebreaking-activities-during-wwi.html", "published_at": "2025-07-06T13:04:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb477c060", "title": "Verification of Decryption of Beale Cipher No.2", "url": "https://cryptiana.blogspot.com/2025/07/verification-of-decryption-of-beale.html", "published_at": "2025-07-04T12:32:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb54b3376", "title": "A Cipher of Eleanor of Navarre (1476)", "url": "https://cryptiana.blogspot.com/2025/05/a-cipher-of-eleanor-of-navarre-1476.html", "published_at": "2025-05-06T22:35:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb622878f", "title": "Imperial Ambassadors in the 1520s (Juan Manuel, Alonso Sanchez)", "url": "https://cryptiana.blogspot.com/2025/05/imperial-ambassadors-in-1520s-juan.html", "published_at": "2025-05-05T23:51:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb701ae78", "title": "Lope de Soria's Cipher Letters (1523)", "url": "https://cryptiana.blogspot.com/2025/04/lope-de-sorias-cipher-letters-1523.html", "published_at": "2025-04-29T04:18:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb7ccb1b7", "title": "Oral Cipher in Yoshiwara Pleasure Quarters in Edo", "url": "https://cryptiana.blogspot.com/2025/03/oral-cipher-in-yoshiwara-pleasure.html", "published_at": "2025-03-28T13:09:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb8bcc249", "title": "Substitution Cipher for Hangul Text in a Book for Kids", "url": "https://cryptiana.blogspot.com/2025/03/substitution-cipher-for-hangul-text-in.html", "published_at": "2025-03-22T13:28:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb8f509a5", "title": "D'Estrades' Ciphers with Mazarin and Others", "url": "https://cryptiana.blogspot.com/2025/03/destrades-ciphers-with-mazarin-and.html", "published_at": "2025-03-11T22:11:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bb9dbc0ab", "title": "Chinese Telegraphic Codebook for Phrases (1948)", "url": "https://cryptiana.blogspot.com/2025/02/chinese-telegraphic-codebook-for.html", "published_at": "2025-02-27T22:22:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bba4e8d9b", "title": "A Cipher in Italian used between Cardinal Gualterio and the French Foreign Minister Torcy (1718)", "url": "https://cryptiana.blogspot.com/2025/02/a-cipher-in-italian-used-between.html", "published_at": "2025-02-25T23:08:00+00:00" }, { "id": "01a0c52d-1485-7327-aa18-ff1bbafbdc06", "title": "Yardley's Diplomatic Novel, Red Sun of Nippon (1934)", "url": "https://cryptiana.blogspot.com/2025/02/yardleys-diplomatic-novel-red-sun-of.html", "published_at": "2025-02-20T22:15:00+00:00" } ] posts Claim your blog
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2026

Walsingham's Pigpen Cipher (1586-1587)original ↗
27 Sept 2026
A Numerical Cipher in an Italian Letter to Francis I (1530)original ↗
27 Sept 2026
A Cipher between Louise of Savoy and Nicolas Raince (1525)original ↗
26 Sept 2026
Use of Cipher in Cardinal Schiner's Letter to Henry VIII (1516)original ↗
24 Sept 2026
Three Ciphers between Adrian of Utrecht and Charles V (1520-1523)original ↗
23 Sept 2026
Many Telegrams Related to Sun Yat-sen in Japanese Archives Decipheredoriginal ↗
23 Sept 2026
Solutions of Ciphers in a Continuous Digit Streamoriginal ↗
22 Sept 2026
Bishop of Worcester's Latin Cipher with Superscripts Reconstructed from Decipherment in Printoriginal ↗
20 Sept 2026
Two Diplomatic Ciphers of Marquis de Villars (1669, 1671)original ↗
20 Sept 2026
Louvois' Petit Chiffre (1690-1691) Solvedoriginal ↗
19 Sept 2026
Two Chinese Cipher Telegrams (1916) Solvedoriginal ↗
18 Sept 2026
Solution of a Syllabic Cipher (Le Tellier-Castelnau Cipher, 1657)original ↗
17 Sept 2026
Protecting Authenticity of Documents against Breaking of Encryption Scheme by Quantum Computingoriginal ↗
11 Sept 2026
Wellington's Code/Cipher during the Peninsular Waroriginal ↗
8 Sept 2026
Route Transposition Ciphers during the US Civil War Solved by using AIoriginal ↗
6 Sept 2026
US Codebreaking Activities in Tokyo during the Korean Waroriginal ↗
16 Aug 2026
How Long Does It Take to Decipher a Despatch?original ↗
9 Aug 2026
Mirabeau's Cipheroriginal ↗
26 Jul 2026
A "Coded" Message from a Tang General to a Korean Generaloriginal ↗
23 Jul 2026
Update on Korean Ciphersoriginal ↗
22 Jul 2026
Mirabeau's Undecoded Letter (1787)original ↗
13 Jul 2026
Spanich Decryption of Claude Blatier's letter (1582)original ↗
12 Jul 2026
Ciphers in the Archives of French Foreign Ministryoriginal ↗
12 Jul 2026
Earliest French Ciphers (1507, 1513, 1521)original ↗
11 Jul 2026
Heavy-Null Cipher Challengeoriginal ↗
9 Jul 2026
Heavy Use of Nulls in Henry of Navarre's Cipher (1586)original ↗
6 Jul 2026
Ciphering Errors of Elizabeth Stuart, Queen of Bohemiaoriginal ↗
3 Jul 2026
Sittler's Commercial Codebook Used for Dutch Diplomatic Serviceoriginal ↗
27 Jun 2026
What Happened to Code when France was Occupied by Nazi Germany?original ↗
27 Jun 2026
Issues with Recent "Solution" of Zodiac Z13original ↗
25 Jun 2026
A Pigpen Cipher of Philip II's Agent (1577)original ↗
13 Jun 2026
A Match Wanted for Another Cipher to Emperor Charles Voriginal ↗
7 Jun 2026
Undecoded Armstrong's Letter (1808) Sent to Madison by Mistakeoriginal ↗
4 Jun 2026
Yet More Ciphers from Emperor Charles V's Timeoriginal ↗
29 May 2026
A French Diplomatic Code from 1748original ↗
16 May 2026
Full Decipherment of Pedro de Ayala's Letter to Ferdinand and Isabella (1498)original ↗
28 Apr 2026
Extending the Key of Barbeu-Dubourg's Passage Cipher with Franklinoriginal ↗
27 Apr 2026
A British Book Cipher during the American Revolutionary Waroriginal ↗
26 Apr 2026
An Essay on Spanish Ciphers by 19th Century Archivist at Simancasoriginal ↗
17 Apr 2026
Two More Ciphers of Emperor Charles V in 1527 Identifiedoriginal ↗
15 Apr 2026
Can You Find a Match from a List of Ciphers of Charles V?original ↗
7 Apr 2026
Recent Studies on Ciphers in the Reign of Emperor Charles Voriginal ↗
6 Apr 2026
A Code of Count of Maurepas, Secretary of State of the Navy (1733)original ↗
22 Mar 2026
A Power from Prince Philip Arrived in Cipher (1554)original ↗
21 Mar 2026
Three Ciphers Used in Correspondence between Granvelle and Simon Renardoriginal ↗
20 Mar 2026
A Cipher Used by Margaret of Austria (1508) (Not Properly Scanned)original ↗
19 Mar 2026
A Cipher Used by Mary of Austria (1546)original ↗
18 Mar 2026
An Undeciphered Letter from Henrietta Maria (1648)?original ↗
17 Mar 2026
An Imperial Diplomat Resists Updating Ciphers (1646)original ↗
16 Mar 2026
French Ciphers for German Affairsoriginal ↗
14 Mar 2026
French Numerical Ciphers from the 1570soriginal ↗
10 Mar 2026
Reconstruction of a Cipher used by Charles de Danzay, French Ambassador to Denmarkoriginal ↗
22 Feb 2026
Vigenere's Cipher That Allows Two Readingsoriginal ↗
18 Feb 2026
Factor Exponent Cipher (from TV Series "Hard Nuts")original ↗
11 Feb 2026
Solution of My Running Key Challengeoriginal ↗
7 Feb 2026
A Memoire of a Japanese Crypto-Operator during WWIIoriginal ↗
3 Feb 2026
Running Key Challengeoriginal ↗
1 Feb 2026
"Harvest Now, Decrypt Later" Requires Protective Measures before Q-Dayoriginal ↗
31 Jan 2026
Vigenere's Description of Scytale Not as a Transposition Cipheroriginal ↗
28 Jan 2026
Prince of Condé's Simple Substitution Cipher (1792-1800)original ↗
26 Jan 2026

2025

K4 Kryptos Secret Sold for Nearly a Million Dollarsoriginal ↗
22 Nov 2025
Decoding Armstrong's Letter: Help Wanted for Madison Papersoriginal ↗
22 Oct 2025
An Undeciphered Letter of Le Tellier to a General in Flanders (1657)original ↗
20 Oct 2025
Reconstruction of a Venetian Cipher (1552)original ↗
17 Oct 2025
"Deciphering Mary Stuart's lost letters from 1578-1584" is available as Open Accessoriginal ↗
16 Oct 2025
Telegraph Operator Leaked Union Commander's Name in US Civil War?original ↗
10 Oct 2025
Emperor Charles VIoriginal ↗
5 Oct 2025
Emperor Maximilian II's Cipher Lettersoriginal ↗
4 Oct 2025
My Profileoriginal ↗
4 Oct 2025
A Substitution Cipher in Chinese for Kidsoriginal ↗
1 Oct 2025
Coded Letters of Admiral D'Estaing (1779) and Marshal Berthier (1812) Transcribedoriginal ↗
30 Sept 2025
Correspondence between Charles Babbage and Historian Everett Greenoriginal ↗
29 Sept 2025
Solution of William Perwich's Transposition Cipher (2/2)original ↗
28 Sept 2025
Solution of William Perwich's Transposition Cipher (1/2)original ↗
28 Sept 2025
A Wish to End Hunger from Wartime Experience in a Crypto Unit of the Author of Anpanmanoriginal ↗
20 Sept 2025
Correspondence between Emperor Ferdinand III and Governor of the Spanish Netherlands (1634, 1635, 1640)original ↗
19 Sept 2025
An Undeciphered Transposition Cipher of William Perwich, an English Agent in Paris (1670)original ↗
19 Sept 2025
Variable-length Numerical Code in Austrian Archivesoriginal ↗
17 Sept 2025
A French TV Documentary on the Codebreaking of Mary Stuart's Letters Premiered in Parisoriginal ↗
17 Sept 2025
Cipher of Imperial Ambassador Juan Perez (1527)original ↗
9 Sept 2025
Correspondence of Imperial Ambassador Juan Manuel (1522)original ↗
8 Sept 2025
Correspondence of Imperial Ambassador Alonzo Sanchez (1522)original ↗
5 Sept 2025
Can a Vigenere Cipher be Broken without Key Repetition?original ↗
30 Aug 2025
A Florentine Polyalphabetic Cipher from the 1480soriginal ↗
28 Aug 2025
Japanese Cipher Disks during the Meiji Periodoriginal ↗
18 Aug 2025
Real Messages Encrypted by Japanese RED Machineoriginal ↗
17 Aug 2025
"Cipher Disk" before Albertioriginal ↗
11 Aug 2025
An Original French Naval Code (1778)original ↗
14 Jul 2025
Tuple Ciphers (Enciphering a letter with two letters)original ↗
12 Jul 2025
Dutch Codebreaking Activities during WWIoriginal ↗
6 Jul 2025
Verification of Decryption of Beale Cipher No.2original ↗
4 Jul 2025
A Cipher of Eleanor of Navarre (1476)original ↗
6 May 2025
Imperial Ambassadors in the 1520s (Juan Manuel, Alonso Sanchez)original ↗
5 May 2025
Lope de Soria's Cipher Letters (1523)original ↗
29 Apr 2025
Oral Cipher in Yoshiwara Pleasure Quarters in Edooriginal ↗
28 Mar 2025
Substitution Cipher for Hangul Text in a Book for Kidsoriginal ↗
22 Mar 2025
D'Estrades' Ciphers with Mazarin and Othersoriginal ↗
11 Mar 2025
Chinese Telegraphic Codebook for Phrases (1948)original ↗
27 Feb 2025
A Cipher in Italian used between Cardinal Gualterio and the French Foreign Minister Torcy (1718)original ↗
25 Feb 2025
Yardley's Diplomatic Novel, Red Sun of Nippon (1934)original ↗
20 Feb 2025
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