We redesigned MysteryTwister, enjoy! Feedback

 Explore Challenges

Handycipher — Part 6 Level 3

by Bruce Kallick, published on 6/28/2016

Handycipher is a newly created cipher designed to permit pen-and-paper encrypting and decrypting, while providing a significantly high level of security. Part 6 is the same as Part 3, but uses an improved version of the cipher. It is a ciphertext-only challenge.