A dog tag introduced by a Reddit reader bears an inscription that looks like encrypted text. Can a reader solve this cryptogram?
For almost 40 years, an unknown person has published cryptic advertisements in a US university newspaper. It is still unknown who is behind this game.
A Donald Duck comic story, which was recently republished in a German Disney magazine, contains an encrypted message. The solution, if it exists, appears to be unknown. Can a reader break this cryptogram?
The Rohonc Codex, one of the world’s most famous crypto mysteries, appears to have been solved. Here are the details about the solution.
The Rohonc Codex, one of the world’s most famous crypto mysteries, appears to have been solved. And yes, I believe this solution is correct.
Here’s a great challenge for my readers: Robert Bunch (1820-1881), a British spy in the US Civil War, left behind a number of encrypted messages that have never been deciphered. Can you solve this mystery?
Nathan Allen from Maryland died from a bomb that exploded in his car. The murderer was found with the help of a steganographic technique.
Only little is publicly known about the encryption systems used by the German terrorist organisation, RAF. A recent TV documentary that shows a number of encrypted RAF messages along with a key provides at least some basic information.
A postcard from 1903 is encrypted in a dancing men code, like it is described in a famous Sherlock Holmes story. Can a reader decipher it?
A Reddit user has posted photos of an unusual machine, the purpose of which is unknown. Some say it might be an encryption machine. Can a reader tell more about it?
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