ROT13 Cipher

Encrypt or decrypt messages by shifting letters through the alphabet.

Digraph substitution cipher that encrypts pairs of letters using a 5x5 grid.

Simple transposition cipher that writes text in a zigzag pattern across multiple rails.

Polyalphabetic substitution cipher using a keyword for enhanced encryption.

Polysubstitution cipher that uses the plaintext itself as part of the encryption key.

Grid-based substitution cipher using geometric symbols to represent letters.