Begin encrypting and decrypting messages with classical encryption techniques.
Note: This tool supports Caesar, Vigenère, Atbash, Rail Fence, and Playfair ciphers. Each requires different inputs.
This table shows how each letter is encrypt/decrypt using Vigenère Cipher.
How to use: Hover over any cell to highlight the related row and column. Click a cell to lock the highlight and unclick to unlock.
To encrypt: Find the row header of the keyword and the column header of the plaintext letter. The intersect cell is the ciphertext.
To decrypt: Find the row header of the keyword, find the ciphertext in the same row, then look at the column header.