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Title:
Unicity distance of the Zodiac-340 cipher
Authors: Joachim von zur Gathen
Abstract:In December 2020, David Oranchak, Jarl Van Eycke, and Sam Blake solved a 51-year old mystery: the Zodiac cipher of 340 symbols. Blake (2021) explains their solution. The correctness of their solution has not been seriously doubted, and here we give a further argument in its favor: the unicity distance of the cipher’s system is at most 152.
ePrint: https://eprint.iacr.org/2021/1620
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