I have never been so bored in my life. That's why I chose to make this project. Anyways, the Caesar cipher is one of the simplest and most famous techniques used for encrypting messages. It is named after Gaius Julius Caesar, a Roman general, statesman, and later dictator until his assassination, who used it. It functions easily - With every text you have to provide a shift (a number up to 26), and every letter will be shifted along the alphabet to the right that amount of times. For example, if the shift is 3, A will turn into D (A -> B -> C -> D). While it sounds fun, it's actually very weak (easy to break). It's best not to use it nowadays for genuinely important messages, but what kind of person would turn to Scratch for a good encryptor? No-one. Because Scratch doesn't implement case-sensitivity when checking for list membership, every message will be in lowercase. There is nothing I can nor will do about that. https://en.wikipedia.org/wiki/Caesar_cipher