19th century musician Maurice de Raoulx has left behind a message hidden in sheet music. Can a reader decipher it?
British artist Ben Gentilli has created a series of 40 paintings that jointly include the 12.3 million-digit founding code of Bitcoin.
On Reddit, I found a pigpen message written on the skin of a prisoner. The plaintext provided in the post doesn’t look correct to me.
A challenge cryptogram from a 2012 puzzle book is still unsolved. The author will award a book copy to the first one to break it.
In the 2020 film “Enola Holmes”, several interesting ciphertexts can be seen. It is well possible that the producers took some of their ideas from this blog.
U.S. journalist and book author A.J. Jacobs has interviewed Jim Sanborn, the creator of the Kryptos sculpture. Here’s a transcript of this talk.
Last year, a Nebraska prisoner sent an encrypted message to his girl-friend, who was kept in the same jail. The content of the note was not a love message.
Blog reader Jozef Krajčovič has sent me a turning grille ciphertext he found in an 1870 scientific journal. Can a reader decipher it?
A newspaper article published earlier this year covers an encrypted message written by a supermax-prison inmate. The content of this note is about steganography.
An encrypted postcard I recently discovered looked familiar to me. As it turned out, I had already blogged about a card from the same sender.
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