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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 organization—recently declassified a Cold War-era document about code-breaking. The first two parts of the trilogy ...

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 ...

With the advent of quantum computers capable of solving specific problems at incredible speeds, concerns are mounting that they could also break the encryption used in modern communications. A South ...

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 ...