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 story of Kryptos and the cryptanalyst who spent decades trying to solve the CIA sculpture greatest mystery.

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 ...

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 organisation — recently declassified a Cold War-era document about code-breaking. The 1977 book, written by ...