NSA
FUN FACTS SHEET
Fun Facts about Cryptology**the study of secret writing and codesGeorge Washington’s alphabet code sheet. Try writing a message!Cryptology began in the ancient world. The ancient Greeks used ascytale, in which the person sending a message wound a strip of clotharound a stick, wrote the message vertically, filled in some random letters,unwrapped the strip, and sent it to the recipient...
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Internal Periodicals & Publications
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