The Register wrote:A code breaking riddle that offers the chance to win a genuine World War II Enigma machine remains unsolved more than a year after the challenge was first posed.
The chance to own a piece of crypto history is on offer through a code-breaking competition associated with the book Can you crack the Enigma code? by author Richard Belfield.......
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The original article
For all the details of the challenge goto Can You Crack The Enigma Code
I can think of a couple of teams who this could appeal to