Labs / Book Cipher Challenge
- Daily Challenge
- Released 22 Aug 2025
📖 Can you crack this centuries-old encryption method?
Revolutionary spies used this ingenious method to hide secrets in plain sight for centuries, baffling entire governments with mysterious number sequences. 🕵️ Can you decode what looks like random digits but actually unlocks hidden messages? Discover how an ordinary book becomes the key to unbreakable encryption and put your detective skills to the ultimate test! 🔍
1
Flags
1
Points
Daily Challenge
Solution Available
Free Access
Start Lab Environment
Launch your dedicated AWS machine to begin hacking
~1-2 min setup
AWS dedicated
Private instance
Industry standard
Daily Challenge
Solution Coming Soon
The solution for this lab will be available on 05 Sep 2025 00:00 UTC.
To keep the new labs challenging for everyone, solutions are only available 30 days after a lab has been released or when it gets archived, whichever comes first.