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The third ENIGMA M4 message Level X
by Michael Hörenberg, published on 2011-09-21
In 2006 the distributed "M4 Message Breaking Project" under the lead of Stefan Krah aimed at decrypting three ENIGMA M4 messages from the time of World War II. Two of the three messages where decrypted within the first weeks. However, the third message withstood despite all efforts and remained unbroken. Today, the M4 project has been discontinued with the last message still unbroken. The task of this challenge is to break this very last message - after all, a few years have past since the…
A solution to this challenge was published on 2013-12-31. Solutions can still be submitted and verified, but no points will be awarded for them.
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