cryptography, history of cryptography, military, Security technology, Uncategorized
Interesting article—with photos!—of the US/UK “Combined Cipher Machine” from WWII. Powered by WPeMatico
Category: history of cryptography
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encryption, history of cryptography, reports, Security technology, Uncategorized
Really interesting analysis of the American M-209 encryption device and its security. Powered by WPeMatico
cryptography, foia, history of cryptography, history of security, nsa, Security technology, Uncategorized, videos
The NSA’s “National Cryptographic School Television Catalogue” from 1991 lists about 600 COMSEC and SIGINT training videos. There are a bunch explaining the operations of various cryptographic equipment, and a few code words I have never heard of before. Powered by WPeMatico
academic papers, cryptanalysis, history of cryptography, Security technology, Uncategorized
Really interesting article on the ancient-manuscript scholars who are applying their techniques to the Voynich Manuscript. No one has been able to understand the writing yet, but there are some new understandings: Davis presented her findings at the medieval-studies conference and published them in 2020 in the journal Manuscript Studies. She had hardly solved the … Read More “On the Voynich Manuscript” »
academic papers, cryptanalysis, cryptography, history of cryptography, Security technology, Uncategorized
Interesting paper about a German cryptanalysis machine that helped break the US M-209 mechanical ciphering machine. The paper contains a good description of how the M-209 works. Powered by WPeMatico
cryptanalysis, enigma, history of cryptography, Security technology, Uncategorized, war
The Polish Embassy has posted a series of short interview segments with Marian Rejewski, the first person to crack the Enigma. Details from his biography. Powered by WPeMatico
espionage, history of cryptography, military, Security technology, Uncategorized
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 recordings of whales, dolphins, sea lions, and seals. The submarine would broadcast the noises and a computer—the Combo Signal Recognizer (CSR)—would detect the specific patterns and decode them on … Read More “Whale Song Code” »
Applied Cryptography, foia, history of cryptography, history of security, nsa, Security technology, Uncategorized
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 to 2003. There are many interesting things in the 800 pages of newsletter. There are many redactions. And a 1994 review of Applied Cryptography by redacted: Applied Cryptography, for those … Read More “Declassified NSA Newsletters” »
books, cryptanalysis, history of cryptography, Security technology, Uncategorized
David Kahn has died. His groundbreaking book, The Codebreakers was the first serious book I read about codebreaking, and one of the primary reasons I entered this field. He will be missed. Powered by WPeMatico
cryptography, history of cryptography, Security technology, Uncategorized
GCHQ has released new images of the WWII Colossus code-breaking computer, celebrating the machine’s eightieth anniversary (birthday?). News article. Powered by WPeMatico