Voynich-Challenge-bar

At least 50 persons have claimed to have deciphered the Voynich Manuscript. A simple test I have developped helps to check whether a solution is correct.

Linkin-Park-cryptogram-bar

A video clip of US rock band Linkin Park shows a wall with an encrypted inscription. Can a reader decipher it?

Gundersen-Disk-bar

A few days ago I blogged about an unknown cipher disk from Pleidelsheim, Germany. Now a reader has sent me pictures of a very similar device. It stems from Norway.

Beltan-cryptogram-bar

A member of a genealogy forum has posted an encrypted text that was left behind by an ancestor of his. Can a reader solve this mystery?

Linge-bar

Dutch collectors Paul Reuvers and Marc Simons own a simple, but carefully made cipher disk produced by Linge in Pleidelsheim. Can a reader help to find out more about this device?

ICe-Cream-Van-bar

Today I am going to introduce a simple asymmetric encryption system. It’s not suitable for practical use, but very helpful for explaining how public key cryptography works.

Voynich-Bar-4

Again, a new research work about the Voynich manuscript has been published. The author believes that the famous book was created by an Italian jew. Does this hypothesis make sense? Is the author trustworthy?

Enigma-M4-2-bar

An M4 Enigma from World War II has set a new world record price at a Christie’s auction in New York.

Ferdinand-bar

During the Thirty Years’ War emperor Ferdinand III (1608 -1657) used a secret writing system. It has never been solved.

Crossword-BNA-bar

In WW2 German spy Wulf Schmidt used a simple encryption method based on a crossword puzzle.