ebay has been used to sell some remarkable items but, amazingly, there's a live auction right now for a German WWII Enigma cipher machine. With under three hours left to go, bidding stands at EUR ...
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 ...
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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