In the winter of 54 BCE, a javelin flew into a besieged Roman camp in Gaul with a letter tied to it. The camp was commanded by Quintus Tullius Cicero, brother of the famous orator, and enemy forces ...

One thing that is no surprise is that phishing continues to be an ongoing threat to consumers and organizations alike. No longer are these the simplistic “you’ve won the Canadian lottery” or “I’m a ...

April 12, 2012 Add as a preferred source on Google Add as a preferred source on Google In general, you want to avoid writing down sensitive information and just keeping it in your head but that's not ...

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 ...

Kevin Sands, author of The Blackthorn Key, picks his favourite keys, codes and ciphers throughout history, from the Caesar shift to the Enigma machine If knowledge is power, then the key to power lies ...

Practice encryption and decryption for GCSE Computer Science - e.g. Edexcel 3.4.2: understand how a Caesar cipher algorithm works. It makes sense to give students lots of practical experience with an ...

plaintext AND to decrypt a ciphertext. That is four operations, and most resources show one. Every sheet here does all four. 8-bit ASCII code is given, and so is the one-time pad’s; the student poses ...