The zodiac killer ciphers
Abstract
We describe the background of the Zodiac killer's cipher, and
present a strategy for how to attack the unsolved Z340 cipher. We present evidence that there is a high degree of non-randomness in the sequence of ciphertext
symbols in this cipher, suggesting it has been constructed in a systematic way.
Next, we use this information to design a tool for solving the Zodiac ciphers.
Using this tool we are able to re-solve the known Z408 cipher.
present a strategy for how to attack the unsolved Z340 cipher. We present evidence that there is a high degree of non-randomness in the sequence of ciphertext
symbols in this cipher, suggesting it has been constructed in a systematic way.
Next, we use this information to design a tool for solving the Zodiac ciphers.
Using this tool we are able to re-solve the known Z408 cipher.
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PDFDOI: https://doi.org/10.2478/tatra.v45i0.68