At the end of World War II, the Germans ordered all Enigma cipher machines destroyed. Around the same time, Churchill ordered all Enigma cipher machines destroyed. Add a few decades, neglect the ...
The particularity of these cipher devices is that they shouldn't exist anymore. Not in one piece and certainly not functional. Because it was a state secret technology, utmost care was taken by German ...
A masters' student at the University of Cambridge, Hal Evans, has successfully built the first fully functioning replica of a cyclometer – a machine built in the early 1930s by Polish mathematicians ...
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 ...
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