This is a list of encrypted books. Its purpose is to catalog all encrypted books that are known. For the definition of an encrypted book refer to the end of this page. If you know an encrypted book ...

Wenn man n Punkte in der Ebene hat, dann können die Abstände der n(n-1)/2 Punktepaare untereinander natürlich nicht alle dieselbe Zahl sein und es stellt sich die Frage, wieviele unterschiedliche ...

Hard to believe, but it’s been over seven years since I first blogged about the Surrey encrypted carrier pigeon message. At that time, I featured this cryptogram at #21 on my top 25 list of unsolved ...

Substituting letter pairs (bigrams) is an encryption method that was already known in the 16th century. Is it still secure today? To develop an encryption method that only requires pen and paper is a ...

Bemerkenswert an diesem Gegenbeispiel ist, dass es nicht von einem Menschen gefunden wurde, sondern von einer Maschine. Our framework consists of two components: an informal reasoning agent, Rethlas, ...

Encryption and espionage are inextricably linked. In my book “Codebreakers vs. Codemakers”, the fourth edition of which is currently being written, there is therefore a separate chapter on this topic.

“The Imitation Game”, starring Benedict Cumberbatch, is one of the most popular movies that features cryptography. Unfortunately, it contains many historical errors. There’s no doubt that The ...

Since I’ve been writing this blog, I’ve always been on the lookout for interesting stories related to encryption. I am particularly interested in encrypted information that has something to do with a ...

I have often reported about encrypted diaries on Cipherbrain. For example, a few weeks ago I blogged about such encrypted diaries that were excerpted by their authors on Reddit. Blog reader Yefim ...

Ich bin Grafiker und Hobby-Historiker. Meine Schwerpunkte sind das Zeitalter der Entdeckungsreisen, Wissenschaftsgeschichte und Kartografie. Besonders liebe ich Südamerika, wo ich als Jugendlicher ...

The first person to solve the current crypto puzzle creates the next one. The Friedman Ring works according to this simple principle. This is a game named after cryptologists William and Elizebeth ...

Yesterday I happened to watch the movie The Prestige (2006), which is about two stage magicians in the late 19th century, who start a deadly rivalry. I enjoyed this film very well, although I ...