Add Yahoo as a preferred source to see more of our stories on Google. William Abel, a mail censor at Iowa's State Prison, Fort Madison, using a hot iron to bring out a secret message written in lemon ...

On June 27, 2010, the FBI arrested 10 Russian spies who lived and worked as American professionals near New York City. The case, which unraveled an intricate system of false identities and clandestine ...

In steganography, an ordinary message masks the presence of a secret communication. Humans can never do it perfectly, but a new study shows it’s possible for machines. On June 27, 2010, the FBI ...

Dalton Cooper is the Managing Editor of GameRant. Dalton has been writing about video games professionally since 2011. Having written thousands of game reviews and articles over the course of his ...

Vlogger Reuben Levine tells the story of the Colombian army in 2010 sending a message to prisoners of a revolutionary guerilla group by hiding a Morse code message in a concocted pop song. Watch this ...