Cryptanalysis of an Enciphered Code Problem: Where an Additive Method of Encipherment Has Been Usedby Wayne G. Barker
Text provides a hands-on problem: an enciphered code problem with text in English that duplicates an actual Italian system used in Libya in 1940. The student is shown how to solve the problem with the concept of "differences" as applied to the analysis of an additive system being discussed in detail, and shown the use of "difference tables," etc.
- Aegean Park Press
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