Puzzles, Ciphers and Brain Teasers

Welcome, Agent.

This site is home to the EyeEmmEff self destructing message tool. You're currently viewing the cipher puzzles section:

Crack cipher puzzles and test your code-breaking skills using classic ciphers like Caesar, Atbash, and Vigenère. New challenges added regularly.
Have you got what it takes to decipher the hidden messages. Your mission begins now...

Date
Question / Puzzle / Brain Teaser
Action
11-Jun-2025
Operation Cogwheel
04-Jun-2025
Codebreaker’s Challenge: “Operation Ultra Echo”
28-May-2025
Operation Reflected Truth
22-May-2025
Operation Sand Mirage
15-May-2025
Final Reckoning
10-May-2025
Operation Mirror Waltz
05-May-2025
Operation Concrete Ghost
28-Apr-2025
Operation Midnight Mirage
21-Apr-2025
Operation Ghost Tracks
13-Apr-2025
Mission Codename: “Operation Skyfall”
07-Apr-2025
What did the romans ever do for us?
30-Mar-2025
Critical Rendezvous
27-Mar-2025
Mission: Ultravox
25-Mar-2025
Mission: Secret Location
21-Mar-2025
Mission Briefing:
19-Mar-2025
Mission: The Disguised Destination
16-Mar-2025
Mission: The Hidden Coordinates
15-Mar-2025
Mission Impossible Cipher Challenge