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?
A museum in Paris, France, keeps a notebook of French painter Camille Corot (1796-1875). A page in this document is encrypted. Can somebody break this cryptogram?
Blog reader Dominique Eggerstedt has found a bottle post in a canal in Northern Germany. It contains some text parts that look encrypted. Can a reader solve this mystery?
Blog reader Rosemarie Kohles from Coburg owns an old postcard written in a shorthand. Can somebody decrypt it for her?
The longest key ever publicly broken by exhaustive key search was 64 bits long. If you solve the cryptogram I introduce in this blog post, you can set a new record.
A recent article in the Sherlock Holmes fan magazine “The Baker Street Chronicle” reports on the relationship between the world’s greatest private detective and cryptology. In addition, it covers a few unsolved cryptograms from a real Victorian investigator.
A researcher from Liechtenstein has asked me for help. She has encountered three partially encrypted letters from the early 19th century. Can a reader decrypt them?
Today’s post is about a book with strange illustrations written in an unknown script. This book still waits to be deciphered. And no, I’m not talking about the Voynich manuscript.
A crypto book published in 1808 contains an exercise cryptogram. The solution is not given. Can you find it?
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