We redesigned MysteryTwister, enjoy! Feedback

 Explore Challenges

Weakened Granit — Part 3 Level 2

by Jörg Drobick, published on 9/24/2015

The challenges for the simplified GRANIT cipher, a method that can be done manually, serve as an exercise and use an intentionally simplified version of GRANIT. Part 3 is a ciphertext-only challenge for which the second permutation key is known.