#historyofcryptography — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #historyofcryptography, aggregated by home.social.
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AI Used to Decrypt Medieval Ciphers
Researchers are using machine learning algorithms to decrypt historical pencil-and-paper ciphers.... https://www.schneier.com/blog/archives/2026/06/ai-used-to-decrypt-medieval-ciphers.html
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AI Used to Decrypt Medieval Ciphers
Researchers are using machine learning algorithms to decrypt historical pencil-and-paper ciphers.... https://www.schneier.com/blog/archives/2026/06/ai-used-to-decrypt-medieval-ciphers.html
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Medieval Encrypted Letter Decoded
Sent by a Spanish diplomat. Apparently people have been working on it since it was rediscovered in 1860.... https://www.schneier.com/blog/archives/2026/04/medieval-encrypted-letter-decoded.html
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Medieval Encrypted Letter Decoded
Sent by a Spanish diplomat. Apparently people have been working on it since it was rediscovered in 1860.... https://www.schneier.com/blog/archives/2026/04/medieval-encrypted-letter-decoded.html
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Inventors of Quantum Cryptography Win Turing Award
Charles Bennett and Gilles Brassard have won the 2026 Turing Award for inventing quantum cryptography.
I am incredibly pleased to see... https://www.schneier.com/blog/archives/2026/03/inventors-of-quantum-cryptography-win-turing-award.html#historyofcryptography #quantumcryptography #quantumcomputing #Uncategorized
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Inventors of Quantum Cryptography Win Turing Award
Charles Bennett and Gilles Brassard have won the 2026 Turing Award for inventing quantum cryptography.
I am incredibly pleased to see... https://www.schneier.com/blog/archives/2026/03/inventors-of-quantum-cryptography-win-turing-award.html#historyofcryptography #quantumcryptography #quantumcomputing #Uncategorized
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Book Review: The Business of Secrets
The Business of Secrets: Adventures in Selling Encryption Around the World by Fred Kinch (May 24, 2004)
From the vantage point of today, it’s surreal reading about the commercial cryptography business in the 1970s. No... https://www.schneier.com/blog/archives/2025/11/book-review-the-business-of-secrets.html#historyofcryptography #businessofsecurity #Uncategorized #cryptography #encryption
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Book Review: The Business of Secrets
The Business of Secrets: Adventures in Selling Encryption Around the World by Fred Kinch (May 24, 2004)
From the vantage point of today, it’s surreal reading about the commercial cryptography business in the 1970s. No... https://www.schneier.com/blog/archives/2025/11/book-review-the-business-of-secrets.html#historyofcryptography #businessofsecurity #Uncategorized #cryptography #encryption
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Book Review: The Business of Secrets https://www.schneier.com/blog/archives/2025/11/book-review-the-business-of-secrets.html #historyofcryptography #businessofsecurity #Uncategorized #cryptography #encryption
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Book Review: The Business of Secrets https://www.schneier.com/blog/archives/2025/11/book-review-the-business-of-secrets.html #historyofcryptography #businessofsecurity #Uncategorized #cryptography #encryption
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1965 Cryptanalysis Training Workbook Released by the NSA – Source: www.schneier.com https://ciso2ciso.com/1965-cryptanalysis-training-workbook-released-by-the-nsa-source-www-schneier-com/ #rssfeedpostgeneratorecho #historyofcryptography #SchneierOnSecurity #SchneieronSecurity #CyberSecurityNews #cryptanalysis #Uncategorized #NSA
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1965 Cryptanalysis Training Workbook Released by the NSA – Source: www.schneier.com https://ciso2ciso.com/1965-cryptanalysis-training-workbook-released-by-the-nsa-source-www-schneier-com/ #rssfeedpostgeneratorecho #historyofcryptography #SchneierOnSecurity #SchneieronSecurity #CyberSecurityNews #cryptanalysis #Uncategorized #NSA
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1965 Cryptanalysis Training Workbook Released by the NSA
In the early 1960s, National Security Agency cryptanalyst and cryptanalysis instructor Lambros D. Callimahos coined the term “Stethoscope” to describe a diagnostic computer program used to unravel the internal structure of pre-computer... https://www.schneier.com/blog/archives/2025/09/1965-cryptanalysis-training-workbook-released-by-the-nsa.html
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1965 Cryptanalysis Training Workbook Released by the NSA
In the early 1960s, National Security Agency cryptanalyst and cryptanalysis instructor Lambros D. Callimahos coined the term “Stethoscope” to describe a diagnostic computer program used to unravel the internal structure of pre-computer... https://www.schneier.com/blog/archives/2025/09/1965-cryptanalysis-training-workbook-released-by-the-nsa.html
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1965 Cryptanalysis Training Workbook Released by the NSA https://www.schneier.com/blog/archives/2025/09/1965-cryptanalysis-training-workbook-released-by-the-nsa.html #historyofcryptography #Uncategorized #cryptanalysis #NSA
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1965 Cryptanalysis Training Workbook Released by the NSA https://www.schneier.com/blog/archives/2025/09/1965-cryptanalysis-training-workbook-released-by-the-nsa.html #historyofcryptography #Uncategorized #cryptanalysis #NSA
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Jim Sanborn Is Auctioning Off the Solution to Part Four of the Kryptos Sculpture – Source: www.schneier.com https://ciso2ciso.com/jim-sanborn-is-auctioning-off-the-solution-to-part-four-of-the-kryptos-sculpture-source-www-schneier-com/ #rssfeedpostgeneratorecho #historyofcryptography #SchneierOnSecurity #SchneieronSecurity #CyberSecurityNews #Uncategorized #Encryption #CIA
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Jim Sanborn Is Auctioning Off the Solution to Part Four of the Kryptos Sculpture – Source: www.schneier.com https://ciso2ciso.com/jim-sanborn-is-auctioning-off-the-solution-to-part-four-of-the-kryptos-sculpture-source-www-schneier-com/ #rssfeedpostgeneratorecho #historyofcryptography #SchneierOnSecurity #SchneieronSecurity #CyberSecurityNews #Uncategorized #Encryption #CIA
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Jim Sanborn Is Auctioning Off the Solution to Part Four of the Kryptos Sculpture
Well, this is interesting:
The auction, which will include other items... https://www.schneier.com/blog/archives/2025/08/jim-sanborn-is-auctioning-off-the-solution-to-part-four-of-the-kryptos-sculpture.html -
Jim Sanborn Is Auctioning Off the Solution to Part Four of the Kryptos Sculpture
Well, this is interesting:
The auction, which will include other items... https://www.schneier.com/blog/archives/2025/08/jim-sanborn-is-auctioning-off-the-solution-to-part-four-of-the-kryptos-sculpture.html -
Jim Sanborn Is Auctioning Off the Solution to Part Four of the Kryptos Sculpture https://www.schneier.com/blog/archives/2025/08/jim-sanborn-is-auctioning-off-the-solution-to-part-four-of-the-kryptos-sculpture.html #historyofcryptography #Uncategorized #encryption #CIA
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Jim Sanborn Is Auctioning Off the Solution to Part Four of the Kryptos Sculpture https://www.schneier.com/blog/archives/2025/08/jim-sanborn-is-auctioning-off-the-solution-to-part-four-of-the-kryptos-sculpture.html #historyofcryptography #Uncategorized #encryption #CIA
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SIGINT During World War II – Source: www.schneier.com https://ciso2ciso.com/sigint-during-world-war-ii-source-www-schneier-com/ #rssfeedpostgeneratorecho #historyofcryptography #SchneierOnSecurity #SchneieronSecurity #CyberSecurityNews #historyofsecurity #Uncategorized #Intelligence #Reports #GCHQ #NSA #War
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SIGINT During World War II – Source: www.schneier.com https://ciso2ciso.com/sigint-during-world-war-ii-source-www-schneier-com/ #rssfeedpostgeneratorecho #historyofcryptography #SchneierOnSecurity #SchneieronSecurity #CyberSecurityNews #historyofsecurity #Uncategorized #Intelligence #Reports #GCHQ #NSA #War
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SIGINT During World War II
The NSA and GCHQ have jointly published a history of World War II SIGINT: “Secret Messengers: Disseminating SIGINT in the Second World War.” T... https://www.schneier.com/blog/archives/2025/08/sigint-during-world-war-ii.html
#historyofcryptography #historyofsecurity #Uncategorized #intelligence #reports #GCHQ #NSA #war
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SIGINT During World War II
The NSA and GCHQ have jointly published a history of World War II SIGINT: “Secret Messengers: Disseminating SIGINT in the Second World War.” T... https://www.schneier.com/blog/archives/2025/08/sigint-during-world-war-ii.html
#historyofcryptography #historyofsecurity #Uncategorized #intelligence #reports #GCHQ #NSA #war
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The Combined Cipher Machine
Interesting article—with photos!—of the US/UK “Combined Cipher Machine” from WWII.... https://www.schneier.com/blog/archives/2025/03/the-combined-cipher-machine.html
#historyofcryptography #Uncategorized #cryptography #military
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The Combined Cipher Machine
Interesting article—with photos!—of the US/UK “Combined Cipher Machine” from WWII.... https://www.schneier.com/blog/archives/2025/03/the-combined-cipher-machine.html
#historyofcryptography #Uncategorized #cryptography #military
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Long Analysis of the M-209
Really interesting analysis of the American M-209 encryption device and its security.... https://www.schneier.com/blog/archives/2024/09/long-analysis-of-the-m-209.html
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Long Analysis of the M-209
Really interesting analysis of the American M-209 encryption device and its security.... https://www.schneier.com/blog/archives/2024/09/long-analysis-of-the-m-209.html
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List of Old NSA Training Videos
The NSA’s “National Cryptographic School Television Catalogue” from 1991 lists about 600 COMSEC and SIGINT training videos.
There are ... https://www.schneier.com/blog/archives/2024/09/list-of-old-nsa-training-videos.html#historyofcryptography #historyofsecurity #Uncategorized #cryptography #videos #FOIA #NSA
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List of Old NSA Training Videos
The NSA’s “National Cryptographic School Television Catalogue” from 1991 lists about 600 COMSEC and SIGINT training videos.
There are ... https://www.schneier.com/blog/archives/2024/09/list-of-old-nsa-training-videos.html#historyofcryptography #historyofsecurity #Uncategorized #cryptography #videos #FOIA #NSA
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On the Voynich Manuscript
Really interesting <a href="https://www.theatlantic.com/magazine/archive/2024/09/decoding-voynich-manuscript/679157/?gift=YFkW3a8mqv4T0YBMneIYIuIiYZJAqQJorEylZzhFIOw&utm_source=copy-link&utm_medium=social&utm_campaign=share&fbc... https://www.schneier.com/blog/archives/2024/08/on-the-voynich-manuscript.html
#historyofcryptography #academicpapers #Uncategorized #cryptanalysis
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On the Voynich Manuscript
Really interesting <a href="https://www.theatlantic.com/magazine/archive/2024/09/decoding-voynich-manuscript/679157/?gift=YFkW3a8mqv4T0YBMneIYIuIiYZJAqQJorEylZzhFIOw&utm_source=copy-link&utm_medium=social&utm_campaign=share&fbc... https://www.schneier.com/blog/archives/2024/08/on-the-voynich-manuscript.html
#historyofcryptography #academicpapers #Uncategorized #cryptanalysis
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Breaking the M-209
Interesting paper about a German cryptanalysis machine that helped break the US ... https://www.schneier.com/blog/archives/2024/06/breaking-the-m-209.html
#historyofcryptography #academicpapers #Uncategorized #cryptanalysis #cryptography
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Breaking the M-209
Interesting paper about a German cryptanalysis machine that helped break the US ... https://www.schneier.com/blog/archives/2024/06/breaking-the-m-209.html
#historyofcryptography #academicpapers #Uncategorized #cryptanalysis #cryptography
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Rare Interviews with Enigma Cryptanalyst Marian Rejewski – Source: www.schneier.com https://ciso2ciso.com/rare-interviews-with-enigma-cryptanalyst-marian-rejewski-source-www-schneier-com/ #rssfeedpostgeneratorecho #historyofcryptography #SchneierOnSecurity #SchneieronSecurity #CyberSecurityNews #cryptanalysis #Uncategorized #War
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Rare Interviews with Enigma Cryptanalyst Marian Rejewski – Source: www.schneier.com https://ciso2ciso.com/rare-interviews-with-enigma-cryptanalyst-marian-rejewski-source-www-schneier-com/ #rssfeedpostgeneratorecho #historyofcryptography #SchneierOnSecurity #SchneieronSecurity #CyberSecurityNews #cryptanalysis #Uncategorized #War
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Rare Interviews with Enigma Cryptanalyst Marian Rejewski
The Polish Embassy has posted a series of short interview segments with Marian Rejewski, the first person to crack the Enigma.
Details from his <a href="https://www.flyingpenguin.com/?p=4... https://www.schneier.com/blog/archives/2024/05/rare-interviews-with-enigma-cryptanalyst-marian-rejewski.html#historyofcryptography #Uncategorized #cryptanalysis #Enigma #war
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Rare Interviews with Enigma Cryptanalyst Marian Rejewski
The Polish Embassy has posted a series of short interview segments with Marian Rejewski, the first person to crack the Enigma.
Details from his <a href="https://www.flyingpenguin.com/?p=4... https://www.schneier.com/blog/archives/2024/05/rare-interviews-with-enigma-cryptanalyst-marian-rejewski.html#historyofcryptography #Uncategorized #cryptanalysis #Enigma #war
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Whale Song Code – Source: www.schneier.com https://ciso2ciso.com/whale-song-code-source-www-schneier-com/ #rssfeedpostgeneratorecho #historyofcryptography #SchneierOnSecurity #SchneieronSecurity #CyberSecurityNews #Uncategorized #espionage #Military
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Whale Song Code – Source: www.schneier.com https://ciso2ciso.com/whale-song-code-source-www-schneier-com/ #rssfeedpostgeneratorecho #historyofcryptography #SchneierOnSecurity #SchneieronSecurity #CyberSecurityNews #Uncategorized #espionage #Military
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Whale Song Code
During the Cold War, the US Navy tried to make a secret code out of whale song.
The basic plan was to develop coded messages from rec... https://www.schneier.com/blog/archives/2024/04/whale-song-code.html -
Whale Song Code
During the Cold War, the US Navy tried to make a secret code out of whale song.
The basic plan was to develop coded messages from rec... https://www.schneier.com/blog/archives/2024/04/whale-song-code.html -
Declassified NSA Newsletters – Source: www.schneier.com https://ciso2ciso.com/declassified-nsa-newsletters-source-www-schneier-com/ #rssfeedpostgeneratorecho #historyofcryptography #SchneierOnSecurity #SchneieronSecurity #CyberSecurityNews #historyofsecurity #Uncategorized #NSA
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Declassified NSA Newsletters – Source: www.schneier.com https://ciso2ciso.com/declassified-nsa-newsletters-source-www-schneier-com/ #rssfeedpostgeneratorecho #historyofcryptography #SchneierOnSecurity #SchneieronSecurity #CyberSecurityNews #historyofsecurity #Uncategorized #NSA
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Declassified NSA Newsletters – Source: securityboulevard.com https://ciso2ciso.com/declassified-nsa-newsletters-source-securityboulevard-com/ #rssfeedpostgeneratorecho #SecurityBloggersNetwork #historyofcryptography #CyberSecurityNews #historyofsecurity #SecurityBoulevard #Uncategorized #NSA
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Declassified NSA Newsletters – Source: securityboulevard.com https://ciso2ciso.com/declassified-nsa-newsletters-source-securityboulevard-com/ #rssfeedpostgeneratorecho #SecurityBloggersNetwork #historyofcryptography #CyberSecurityNews #historyofsecurity #SecurityBoulevard #Uncategorized #NSA
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Declassified NSA Newsletters
Through a 2010 FOIA request (yes, it took that long), we have copies of the NSA’s KRYPTOS Society Newsletter, “Tales of the Krypt,” from 1994 ... https://www.schneier.com/blog/archives/2024/04/declassified-nsa-newsletters.html
#historyofcryptography #AppliedCryptography #historyofsecurity #Uncategorized #FOIA #NSA
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Declassified NSA Newsletters
Through a 2010 FOIA request (yes, it took that long), we have copies of the NSA’s KRYPTOS Society Newsletter, “Tales of the Krypt,” from 1994 ... https://www.schneier.com/blog/archives/2024/04/declassified-nsa-newsletters.html
#historyofcryptography #AppliedCryptography #historyofsecurity #Uncategorized #FOIA #NSA