Three shorthand postcards, written in Swedish, Volapük and German, wait to be solved. Can you decipher any of these?
In 1922, a man from Luxemburg sent a postcard to a recipient living in the famous brandy town of Cognac, France. The message on the postcard consists of only seven letters. Can a reader find out what it means?
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?
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?
A video by US musician Laurie Anderson contains a spoken sequence of numbers. Can a reader make sense of it?
At first sight, an encrypted postcard from 1909 looks like many others I have introduced on this blog. However, the encryption method used is unusual.
An encrypted telegram from Italy is unsolved. Can a reader find the codebook that was used? Without the codebook, deciphering the telegram is as good as impossible.
In 1913, an unknown person sent an encoded postcard to a man living in the then German town of Nieder-Jeutz. It is not possible to decipher this card unambiguously, but a few guesses can be made.
Letzte Kommentare