UNSOLVED PROBLEMS
in Number Theory, Logic, and Cryptography
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UNSOLVED PROBLEMS in Number Theory, Logic, and Cryptography
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The Zodiac Cipher
The Zodiac killer was responsible for several murders (the exact number is disputed) in the San Francisco area in the late 1960s, and possibly also the early 1970s. He sent several letters and ciphers to newspapers during this time. His first cipher was solved. His second, reproduced here, and sometimes known as the 340 cipher, remains unsolved to this day: his identity is still unknown.
The problem is to solve the cipher.
For further information, please see: [1] http://www.zodiackiller.com/Letters.html [2] http://en.wikipedia.org/wiki/Zodiac_Killer [3] http://www.zodiackillerfacts.com/
* There are currently 0 proposed solutions on the solutions page. |
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