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” »