The Caesar cipher is one of the simplest and oldest encryption techniques. It’s a type of substitution cipher, where each letter in the plaintext is shifted by a fixed number of positions in the ...

Introduction If you need to send a secret message to a friend, how could you prevent other people from reading it? One way is to encrypt the message—that is, use a secret code that only you and your ...

Secret code or foreign language? For machines, it might not matter. Without any prior knowledge, artificial intelligence algorithms have cracked two classic forms of encryption: the Caesar cipher and ...