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 ...
It was on May 24, 1844, that the first officially telegraphed message, “What hath God wrought!” was sent from Washington by Samuel Finley Breese Morse along an experimental, 44-mile line to Baltimore.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results