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 ...

Introduction: A revolutionary cipher -- Cryptology before 1500: a bit of magic -- The black chambers: 1500-1776 -- Crypto goes to war: the American Revolution -- Crypto goes to war: the American Civil ...

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 ...

How does a cipher and code, used by a failed politician, dropped into the middle of a trial for treason in 1807, involving then-president Thomas Jefferson and Chief Justice John Marshall, lead to a ...

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 ...

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.

This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. MYSTERY WIRE — The United States Federal ...

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 ...