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Craig Bauer, mathematics professor and crypto history expert, lets his students solve old ciphertexts as homework. Here are three especially interesting cryptograms Craig’s students have to break.

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The fifth episode of HISTORY’s Zodiac Killer documentary revealed an alleged solution of the infamous Z340 cryptogram. Does it make sense?

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Four episodes of the Zodiac Killer documentary on HISTORY have aired now. The fourth one ended with Craig Bauer saying that he has broken Z340. Will episode 5 tell us the solution?

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US mathematics professor Craig Bauer has published a great book about unsolved cryptograms. Most of these crypto mysteries have been covered on this blog before.

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Und wieder hat sich einiges angesammelt: 1.000 Euro für das Knacken eines Codes, ein interessanter SPIEGEL-Artikel, ein empfehlenswertes Buch und ein Musikvideo mit kryptologischer Sangeskunst.