Crack for Charity — GCHQ launches 'Puzzle Book' Challenge for Cryptographers

The UK’s Signals Intelligence and Cyber Security agency GCHQ has launched its first ever puzzle book, challenging researchers and cryptographers to crack codes for charity.

Dubbed “The GCHQ Puzzle Book,” the book features more than 140 pages of codes, puzzles, and challenges created by expert code breakers at the British intelligence agency.
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Ranging from easy to complex, the

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