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.