Klaus Schmeh

Klaus Schmeh ist Experte für historische Verschlüsselungstechnik. Seine Bücher "Nicht zu knacken" (über die zehn größten ungelösten Verschlüsselungsrätsel) und "Codeknacker gegen Codemacher" (über die Geschichte der Verschlüsselungstechnik) sind Standardwerke. In "Klausis Krypto Kolumne" schreibt er über sein Lieblingsthema.


Peter Rabbit” is a new 3D animated comedy film based on a story by Beatrix Potter (1866-1943). Potter is known to crypto history enthusiasts because she left behind an encrypted diary.


Last year, press reports said that the Devil’s Letter, a notable Italian cryptogram, was solved. It was a good example of how fake news are born.


In the last decade of the 19th century, an unknown person sent three encrypted messages from a place named Bristol. Can a reader decipher these messages?


My readers are pretty good at solving encrypted postcards. However, the two specimens I am going to introduce today look pretty hard to decipher, as the messages are pretty short.


Montecrypto, a new online game that started yesterday, appears to be a mixture between Cicada 3301, Mystery Twister C3, escape room, and the Forest Fenn treasure hunt.


The Enigma breaking machine “Bombe” had a considerable impact on the course of the Second World War. A recently started crowdfunding campaign aims to create a new Bombe display area in Bletchley Park.


The challenges of Giouan Battista Bellaso were one of the top unsolved crypto mysteries. Norbert Biermann has now published the last two parts of the solution.


The M-138 is a low-tech cipher device from the first half of the 20th century. Though being quite simple, the M-138 is hard to break.


In the Second World War, the Germans constructed a voice encryption machine. I have only very little information about this device. Can my readers help me to find out more?


Among the most popular stories in cryptology are those about a hidden treasure, the location of which is described in an encrypted text. Here are three more stories of this kind.