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.

HistoCrypt 2019 will take place from June 23-26, 2019 in Mons, Belgium. Here’s the Call for Papers. Apart from scientific papers, non-academic presentations are invited.

The year starts with a cryptogram that is easy to solve. In 1817 English novelist Jane Austen sent an encrypted letter with new year’s greetings to her niece. Can you decipher this message?

Just like every end of year, I am awarding the Golden Alice for outstanding achievements in the field of crypto history and codebreaking. Here are the winners 2018.

In 2016 several Brazilian newspapers reported on two encrypted letters sent by imprisoned members of the criminal organization PCC. Can my readers help to decipher the letter excerpts that are publicly available?

In 1911, the British consul in Lüderitz, German South West Africa, sent an encrypted telegram to the foreign ministry in London. Can a reader break this encryption?

Here’s an encrypted postcard from the town of Mannswörth, Austria. Can you decipher it?

A postcard depicting tourist attractions in the Swabian Jura bears an encrypted message. Can you decipher it?

On a US website, a cryptogram from the Civil War is introduced. The plaintext is written below it. Can a reader find out if the decryption is correct and what cipher has been used?

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?