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Extended Handycipher — Part 5 Level 3

by Bruce Kallick, published on 6/28/2016

Extended Handycipher is an enhancement of Handycipher. Part 5 is the same as Part 2, but uses an improved version of the cipher. You are given two encryptions of the plaintext generated with the same key, and 229 characters occuring at an unknown location in the plaintext.