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On Reddit an encrypted postcard from 1909 was published. Can you decipher it?

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Kate Ebutt from England has found an encrypted bottle post in the river Don in Sheffield. Can a reader solve it?

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In a scene of the TV series Twin Peaks a flickering air plane window seems to hide some code. Can a reader solve it?

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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.

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The Peralta Stones are a set of engraved stones. Some people believe they indicate the location of a lost gold mine.

Agapeyeff-cryptogram-bar

A crypto book published in 1939 contains an excercise cryptogram. Many have tried to solve it, but the solution is still unknown.

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British private detective Ignatius Pollaky (1828-1918) published a number of encrypted newspaper ads. Some of them have never been solved.

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Bruno Borges, a Brazilian student who has mysteriously vanished from his home, left behind numerous encrypted notes. Now a Brazilian newspaper reports on new activities in this case.

Cryptomenytices-Music-bar

Crypto history expert Prof. Gerhard Strasser once wanted to test if a musical cryptogram from the 17th century really sounded like music. Here’s the result.

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Participants of the International Students’ Olympiad in Cryptography have to solve a number of tough crypto challenges. Here are a few of the nicest ones. Can you solve them?