The first Enigma models were complex and expensive. Only when Enigma inventor Arthur Scherbius simplified the design of his machine it became practicable.
The greatest European crypto history event ever will take place in May 2017. So, save the date, consider handing in a paper, and come to Bratislava!
17th century polymath Daniel Schwenter invented a secret writing method based on musical notes. Can a reader solve a musical cryptogram encrypted in this system?
In the 1920s a woman named Grace Gull wrote a diary. For some text passages she used a secret code. Can a reader break it?
In 1906, an unknown person sent two beautiful postcards encrypted in a pigpen cipher to a man in Kent. Can a reader solve these two postcard cryptograms?
While in New York Carlsen and Karyakin are playing their final games, I am going to present three (alleged) secret codes related to chess.
Pietro Giannone (1791–1872), an Italian poet and patriot, left behind an encrypted poem filling a whole book. After nearly 150 years, mathematics teacher Paolo Bonavoglia broke the encryption.
An Italian website reports on an encrypted notebook written by a 16th century nun. The encryption is unsolved. Can a reader help to shed some more light on this crypto mystery?
Two more encrypted postcards wait to be solved. Can a reader help?
A number of encrypted postcards from different times and places wait to be solved. Can a reader help?
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