Introduction to ciphers and substitution. Alice and Bob and Carl and Julius: terminology and Caesar Cipher ; The key to the matter: generalizing the Caesar Cipher ; Multiplicative ciphers ; Affine ...

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 ...

These sprawling strategic experiences typically encompass long periods of history, including many intricate layers that players need to contend with. It's not just about winning that war or setting up ...

Former police officer and cyber safety expert Susan McLean said the widespread misuse of AI technology and social media posts showed all schools – whether the subject of media coverage or not – needed ...