Category: history of cryptography

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1965 Cryptanalysis Training Workbook Released by the NSA

Posted on By infossl
cryptanalysis, history of cryptography, nsa, Security technology, Uncategorized

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 ciphertexts. The term appears in the newly declassified September 1965 document Cryptanalytic Diagnosis with the Aid of a Computer, which compiled 147 listings … Read More “1965 Cryptanalysis Training Workbook Released by the NSA” »

Jim Sanborn Is Auctioning Off the Solution to Part Four of the Kryptos Sculpture

Posted on By infossl
cia, encryption, history of cryptography, Security technology, Uncategorized

Well, this is interesting: The auction, which will include other items related to cryptology, will be held Nov. 20. RR Auction, the company arranging the sale, estimates a winning bid between $300,000 and $500,000. Along with the original handwritten plain text of K4 and other papers related to the coding, Mr. Sanborn will also be … Read More “Jim Sanborn Is Auctioning Off the Solution to Part Four of the Kryptos Sculpture” »

On the Voynich Manuscript

Posted on By infossl
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” »

Whale Song Code

Posted on By infossl
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” »