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ASAC — A Strong(er) ADFGVX Cipher — Part 3 Level 2

by Stefan Fendt, published on 7/9/2016

This series consists of 5 challenges based on each other. It introduces a new three-step cipher called ASAC, which is a modified version of ADFGVX. Part 3 involves the complete cipher but weakens the third step by using a single-column transposition instead of a double column transposition.