Unlock secrets with our free **Caesar Cipher Decryption Tool**. Easily decode encrypted messages by entering the ciphertext and the shift key. Ideal for students, hobbyists, and anyone exploring basic cryptography. Get your plaintext instantly and understand how Caesar ciphers work.
Formula:
The Caesar cipher decryption formula involves shifting each letter of the ciphertext back by a specific 'key' number of positions in the alphabet.
- C: Ciphertext character
- K: Key (shift value)
- P: Plaintext character
The decryption operation is: P = (C - K) mod 26 (for letters), where mod 26 ensures the result wraps around the alphabet. Non-alphabetic characters are typically left unchanged.