LONDON (Reuters) - Britain's intelligence and security organization GCHQ is publishing a new book of puzzles in the Autumn aimed at those who fancy themselves as potential code-breakers. The book is ...

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 ...

When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Codebreaker X is a puzzle game where you are asked to decipher a sequence of gems to break the ...

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It is perhaps one of the CIA’s most mischievous secrets. “Kryptos,” the sculpture nestled in a courtyard of the agency’s Langley, Va., headquarters since 1990, is a work of art with a secret code ...