A cryptogram that was found on the wall of a tunnel at the University of Texas has been discussed on several websites for years. Can a reader of this blog finally find the solution?
My readers have shown that a Playfair cryptogram consisting of only 50 letters can be broken. Here’s a Playfair challenge with only 40 letters. Can you break it, too?
I have an appearance in a YouTube video that introduces the ten most notable unsolved cryptograms. More than a million people have already watched it.
Canadian artist Zen Rankin has published two encrypted messages he created in his youth days. Can a reader break them?
An alleged cryptanalyst has published a new hypothesis about the Somerton Man cryptogram on Wikipedia. Does it make sense?
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