A French amateur codebreaker claims to have done what police and other investigators could not: Solve the remaining Zodiac Killer ciphers, including one that supposedly reveals the California killer’s ...

The expert cryptanalyst and the Sunday-puzzle expert alike rely on the fact that letters have their own personalities. As David Kahn writes: “To the casual observer, they may look as alike as troops ...

The United States National Security Agency — the country’s premier signals intelligence organisation — recently declassified a Cold War-era document about code-breaking. The 1977 book, written by ...

A coded letter mailed to a San Francisco newspaper by the Zodiac serial killer in 1969 has been deciphered by a team of amateur sleuths from the United States, Australia and Belgium, the San Francisco ...

The world has its fair share of serial killers, with some who have not been caught and are probably running in the wild freely with their real identities still unknown--such as the case of the Zodiac ...

The United States National Security Agency—the country's premier signals intelligence organization—recently declassified a Cold War-era document about code-breaking. The first two parts of the trilogy ...