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.


The encrypted altar inscriptions of Moustier, Belgium, have been puzzling codebreakers for 170 years.


CRAQUEREZ, SAUKNOTEN, INCLEMENTE – these are three words from an encrypted message sent from Manila to Washington in 1898. Can a reader break this cryptogram?


The biannual Symposium on Cryptologic History organized by the NSA is the most important crypto history event in the world. Here’s my report on the 2017 edition.


Two years ago an encrypted bottle post was found in Kaliningrad, Russia. Can a reader break this cryptogram?


A PhD student has come across an encrypted message written by a 19th century anarchist. Can a reader break this encryption?


A fourth encrypted bottle post has been found in the river Alster in Hamburg. Still nobody seems to have a clue what these strange messages mean.


The Freemasons are known to have created a great variety of encrypted documents. Can a reader solve this one from the 19th century?


Five years ago an encrypted carrier pigeon message from World War II hit the news. So far, nobody has been able to decipher it.


An encrypted postcard from the 1870s is written in a strange code. Can a reader solve it?