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In the end credits of the movie Fair Game (2010) some letters are marked. Blog reader Rossignol has now provided me screenshots that are very helpful for studying this code.
The Peralta Stones are a set of engraved stones. Some people believe they indicate the location of a lost gold mine.
A crypto book published in 1939 contains an excercise cryptogram. Many have tried to solve it, but the solution is still unknown.
British private detective Ignatius Pollaky (1828-1918) published a number of encrypted newspaper ads. Some of them have never been solved.
Earlier this year I blogged about Printer Identification Codes, which are one of the IT world’s best-kept secrets. As it seems, a US secret service has now used this technology to track down a whistleblower.
US mathematics professor Craig Bauer has published a great book about unsolved cryptograms. Most of these crypto mysteries have been covered on this blog before.
The Handycipher is an encryption algorithm that doesn’t require a computer program or a machine. But is it secure?
Designing a secure and convenient encryption algorithm that doesn’t require a computer program or a machine is quite a challenge. The Handycipher is an interesting method of this kind.
Crypto history expert Frode Weierud has found a number of encrypted messages in an archive. Can we help him to decipher these cryptograms?
Tissie and Jabber as well as Harry and Caroline were two amorous couples, who exchanged encrypted messages via newspaper ads more than a century ago. Their encryption codes are unsolved to date.
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