Brainloop Blog Cryptic messages: an ABC of encryption

There have always been secrets. And people have been trying to protect their intellectual property from prying eyes for almost as long. For example, the Roman general Julius Caesar used a code for his military correspondence by substituting each letter for the letter three places after it in the alphabet. That turned the word Caesar into Fdhvdu. This simple and – from today’s perspective – insecure form of encryption is a good way of illustrating the basic principles of cryptology.