A coded letter carrying a message from Napoleon Bonaparte to one of his senior generals has been cracked by AI after 217 ...

Invisible ink is one of the most popular methods to send secret messages, created with recipes using substances like milk, ...

A woman in Maryland discovered a coded message hidden within the pages of a secondhand book bought for her by her mother. Sydney, from Baltimore, had been eager to read La Belle Sauvage by Philip ...

Usually, a story about hacking a coded message will have some computer element or, at least, a machine like an Enigma. But [Ruth Selman] recently posted a challenge asking if anyone could decrypt an ...