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发表于2024-12-25
Advanced Military Cryptography (Cryptographic Series , No 8) pdf epub mobi txt 电子书 下载 2024
Transposition and substitution systems are discussed on a general higher level. Attention is likewise devoted to combined substitution and transposition methods. Cryptographs and their limitations are described. Code systems are treated with emphasis on enciphered code systems. A section of the text is devoted to cipher machines, with discussion as to their importance, types of machines, and advantages and disadvantages of cipher machines.
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Advanced Military Cryptography (Cryptographic Series , No 8) pdf epub mobi txt 电子书 下载 2024