The first episode of the new HISTORY TV series about the Zodiac Killer has aired. It announced the biggest break-through in cryptology in the last 50 years.

Gary Klivans, a specialist in breaking gang encryptions, has been featured many times on this blog. Now, he has given an interesting interview to scientific magazine Nautilus.

Nachdem es um meine kleine Serie über Planung in den letzten Monaten etwas ruhig war, geht’s heute damit weiter. In diesem und dem nächsten Artikel geht es um die Auswahl der Geräte, die wir brauchen werden. Für die Planung einer Anlage unterscheidet man alle Geräte grob nach Art und Typ, wobei aus dem Typ die…

Codebreaker genius William Friedman needed 15 minutes to break this cryptogram. His wife Elizebeth, an outstanding cryptanalyst in her own right, needed 17 minutes. How fast can you solve it?

German mathematician Dr. Heinrich Döring was one of the most brilliant codebreakers of the Second World War. Does a reader know what happened to him after 1945?

Yesterday I visited the exhibition “Top Secret!” in Mons, Belgium, together with a few friends and blog readers. Apart from many fascinating exhibits, three interesting photographs of rare cipher machines caught my attention. Can my readers say something about the background of these devices?

The NSA Symposium on Cryptologic History 2017 featured a number of very interesting presentations. Here are videos of a few of them. In addition, I will introduce three crypto puzzles I encountered at the symposium.

In various parts of London and in many other English cities kerbstones bear enigmatic markings. This kerbstone code has yet to be deciphered.

A store in Peekskill, New York, has an interesting encryption machine on sale. Can my readers help to find information about the background of this device?

Ich interessiere mich schon seit einer Weile für künstliche Intelligenz (KI) und die möglichen moralischen und gesellschaftlichen Folgen, die die Weiterentwicklung solcher Systeme haben können. Bezogen auf nahe der Marktreife stehende Anwendungen frage ich mich, wie man eine KI programmieren müßte, die in Zukunft unsere Autos lenken wird und ob dem Nutzer (statt Fahrer) des…