This repository explores classical cryptography, focusing on two major types of ciphers: Substitution and Transposition. The repository provides implementations and explanations for various cipher ...

In an earlier post I analyzed a PHP web shell using a version of transposition obfuscation. Recently, a friend of mine taking a cybersecurity class reached out for assistance with a cipher problem; I ...

It’s been a couple of Math Mondays since we last looked at columnar transposition ciphers, so let’s jump back in. In the It’s been a couple of Math Mondays since we last looked at columnar ...

This was one of the most secure hand ciphers used in the Second World War. It was used by both the Allies and the Axis, and served both well. Its main weakness was that if the attacker intercepted two ...

Type: Substitution cipher. How it Works: Typically, the Caesar Cipher shifts the alphabet by a certain number of positions. When using a word as a key, the letters of the key determine how much each ...