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.
130 years ago, Briton Alfred Janes published a self-invented encryption method along with a challenge cryptogram. My blog readers could solve this tricky mystery.
A crypto book published in 1808 contains an exercise cryptogram. The solution is not given. Can you find it?
Three encrypted postcards from San Francisco are discussed in an internet forum. The solutions still seem to be unknown. Can a reader of this blog help?
Bérenger Saunière (1852-1917) was a French preacher, who has become famous among conspiration theorists and Dan Brown readers. A cryptogram he allegedly left behind is said to have led to a treasure.
An encrypted bottle post was found in Kaliningrad, Russia, in 2015. As it seems, the cleartext is still unknown. Can a reader break this unusual cryptogram?
The Cheltenham Listening Stones are a set of nine sculptures located next to the GCHQ headquarters in Cheltenham, UK. Two of the stones bear an encrypted inscription.
The Navajo code was one of the most successful encryption methods in World War 2. Here are four facts about it you might not have known before.
The pigpen cipher (also known as Freemason’s cipher) is the most popular secret writing alphabet in history. It has been used to encrypt gravestone inscriptions, treasure maps, certificates, testaments, mug inscriptions, beer labels and more. Today, I’m going to introduce ten especially interesting uses.
Little was known about the ciphers of the Unabomber, a highly intelligent serial killer, until the FBI published a detailed description last year. Here’s a summary.
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