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 ...

Deep learning project and theory videos every week! Next To Trump, Carney Opens G7 Summit With Warning Air India Dreamliner made emergency landing after 2023 engine failure 2 Dead, 32 Injured After ...

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 ...