Source Title:
Tatra Mountains Mathematical Publications
|
Volume/Issue:
Volume 45: Issue 1

The zodiac killer ciphers

Håvard Raddum 1  and Marek Sýs 2
  • 1 Department of Informatics, University of Bergen, N–5020 Bergen, NORWAY
  • 2 Department of Applied Informatics, Information Technology, Slovak University of Technology, Ilkoviˇcova 3, SK–812-19 Bratislava, SLOVAKIA
DOI:
https://doi.org/10.2478/v10127-010-0007-8
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Published online:
12 Nov 2012
PDF

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.

Keywords:
classical ciphers.

If the inline PDF is not rendering correctly, you can download the PDF file here.

  • [1] http://oranchak.com/zodiac/webtoy/

  • [2] http://www.ciphertool.com/

  • [3] http://www.zodiackiller.com/340Cipher.html

  • [4] http://sjgt.yweb.sk/tim/index.htm

OPEN ACCESS

Journal + Issues

Tatra Mountains Mathematical Publications

Online ISSN:
1338-9750
First Published:
12 Nov 2012
Language:
English
Publisher:
Sciendo

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