All Challenges
beginnercrypto3 min+10 pts

Caesar Cipher Cracker

Decrypt this ancient Roman message without a computer.

Julius Caesar used a simple substitution cipher to protect his military messages. Each letter is shifted by a fixed number in the alphabet.
challenge
Cipher text: KHOOR ZRUOG
Shift: 3
The cipher shifts each letter 3 positions forward in the alphabet. To decrypt, shift 3 positions backward. What is the original message? (Enter in UPPERCASE)

Challenge of the week?

New challenges added every Monday

Get full labs