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ASAC — A Strong(er) ADFGVX Cipher — Part 4 Level 2
by Stefan Fendt, published on 2016-07-09
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 4 uses the complete cipher and is the main challenge of this series.