Enigma-Algorithm-bar

Two researchers have introduced new techniques for breaking Enigma messages. Using these techniques they have deciphered hitherto unsolved Enigma cryptograms from World War II.

Reihenschieber-Lego-bar

The Reihenschieber was a simple encryption device used by the Germans in the Cold War. I built a model of it with Lego bricks. Can you solve an encrypted text I produced with it?

Golden-Alice

Just like every end of year, I am awarding the Golden Alice for outstanding achievements in the field of crypto history.

Enigma-m4-bar

Enigmas are getting more and more expensive. In New York, a four rotor naval Enigma has now sold for almost half a million dollars.

Early-Enigma-bar

The first Enigma models were complex and expensive. Only when Enigma inventor Arthur Scherbius simplified the design of his machine it became practicable.

Bayer-Letter-bar

In 1941 the German chemicals group Bayer sent an encrypted letter to Columbia. British codebreakers were able to decipher it.

Unknown-Man-Kahn-bar

Around 1990 David Kahn, the father of crypto history, met a tall man wearing a suit and glasses. This is documented on a photograph. Does anybody recognize this man?

German-Machines-bar

In World War 2 the Germans used more than a dozen different cipher machines. A few more were developped but not used in practice. This article gives an overview.

Rueegger-bar

Swiss army veteran, Max Rüegger operated an Enigma in Korea in the the 1960s. Here’s his intriguing report.

Rejewski-Drygalski-Rozycki-bar

Seit fast zehn Jahren steht in Posen (Polen) ein Denkmal zu Ehren der polnischen Enigma-Dechiffrierer. Darauf befinden sich lange Zahlenkolonnen. Bilden diese einen verschlüsselten Text?