Code is the language of mystery & secrets   It may have had none of the sophistication of cryptography, but it was no less ingenious a code. An NCR-based rough & tough gang of lowly ...

Known for his editing of poetry anthologies, Paul B. Janeczko studies another form of often-perplexing writing in Top Secret: A Handbook of Codes, Ciphers, and Secret Writing, illus. by Jenna LaReau.

You could do worse than to confuse the meanings of "code" and "cipher"—even cryptographers sometime use the terms as though they had the same meaning. There is, however, a definite distinction between ...

Sam Blake, an Australian mathematician, first learned of the Zodiac Killer’s unsolved ciphers — a series of encrypted messages — from a documentary in the 1990s. His interest marginally increased in ...

1. Introduction -- 2. From Julius Caesar to simple substitution -- 3. Polyalphabetic systems -- 4. Jigsaw ciphers -- 5. Two-letter ciphers -- 6. Codes -- 7. Ciphers for spies -- 8. Producing random ...