We redesigned MysteryTwister, enjoy! Feedback

 Explore Challenges

Substitution Cipher with Non-Prefix Codes Level 3

by Rashmi Bangalore Muralidhar, Mark Stamp, published on 6/15/2011

Usually prefix-free codes are used for encryption because it makes the decryption process easier at the receiver's end. However, this challenge deals with a substitution cipher with non-prefix codes. This should be broken by performing a "ciphertext-only attack".