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Caesar Cipher app for iPhone and iPad


4.6 ( 7456 ratings )
Utilities Education
Developer: Cedric Pugnaire
Free
Current version: 1.0, last update: 1 year ago
First release : 03 Jul 2020
App size: 1.36 Mb

The Caesar cipher is one of the earliest known and simplest ciphers. It is a type of substitution cipher in which each letter in the plaintext is shifted a certain number of places down the alphabet. For example, with a shift of 1, A would be replaced by B, B would become C, and so on. The method is named after Julius Caesar, who apparently used it to communicate with his generals.
The widely known ROT13 encryption is simply a Caesar cipher with an offset of 13. The Caesar cipher offers essentially no communication security, and it will be shown that it can be easily broken, even by hand - This app is educational only!