Caesar Cipher Mechanics
Implement and break the classic ROT-N substitution cipher.
Welcome
The Caesar cipher is the simplest substitution cipher. Each letter is shifted by a fixed number of positions in the alphabet. Let's implement and break it.
How Caesar Cipher Works
With shift 3: A→D, B→E, ..., Z→C. 'HELLO' becomes 'KHOOR'. Decryption shifts back: 'KHOOR' becomes 'HELLO'.