Introduction If you need to send a secret message to a friend, how could you prevent other people from reading it? One way is to encrypt the message—that is, use a secret code that only you and your ...

We seem to have an instinctive fascination for mysteries and, especially, for mysteries that revolve around secret codes. This penchant brought about a publishing sensation in 2003-Dan Brown's novel ...

The 35-year-old saga of Kryptos, an enigmatic sculpture containing four encrypted messages outside the headquarters of the U.S. Central Intelligence Agency, recently took a bizarre twist.