New York.: ABC-CLIO, 1997. - 321 p. - ISBN: 0-87436-772-7, English. Secret writing for the transmission of messages has been practiced for nearly 4,000 years. According to David Kahn, the great historian of cryptology, the first example of an intentionally altered message can be traced to a tomb in ancient Egypt dated about 1900 b.c. In the 40 centuries since that event, secret...
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