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Level II Challenges (137)

Page 1 of the challenges in Level II, ordered by date posted (the most recent appear first).

ASAC — A Strong(er) ADFGVX Cipher — Part 4

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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.
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Published on: 2016-07-09 19:13
Maximum number of attempts for this challenge: 15

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