A Freemason ritual description from the 19th century is encrypted in two different ciphers. Can a reader find the solutions?
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.
The TV channel HISTORY is launching a series about the Zodiac Killer. Allegedly, a solution to one of the famous cryptograms created by this serial killer will be presented.
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?
The encrypted altar inscriptions of Moustier, Belgium, have been puzzling codebreakers for 170 years.
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.
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