A Rubik’s Cube can be used to implement a highly secure encryption method.
In 1941 the German chemicals group Bayer sent an encrypted letter to Columbia. British codebreakers were able to decipher it.
The FBI has recently declassified crypto-related files from the 1940s. These files contain a number of amusing stories.
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?
Nathaniel Bar-Jonah (1957-2008) was a felon convicted of kidnapping and sexual assault. According to a website, he left behind an encrypted note. Is this note genuine? Can it be solved? I hope my readers can answer these questions.
Last week I had the chance to visit an escape room operated by a company named “Cryptology”. Here’s my report.