Today I thought we could talk a little bit about Columnar Transposition Ciphers (hereby called CTC for short), let’s start with discussing what a CTC is. A CTC is a simple encryption method using a shared key between the participants, where the characters in a clear text message gets shifted around in a specific predetermined …
Tag Archives: encryption
Simple XOR Encryption in PHP
This piece of code is a simple way of encrypting and decrypting text using a bit wise XOR operation. First a simple reminder about how XOR operators work.