Are you a crypto geek?

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I am an unashamed crypto geek. Give me a cipher puzzle, and I’ll happily doodle for hours in understanding how to crack it. I love coding it up, and in generating new puzzles.

So are you a cipher king or queen? You can try here:

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Prof Bill Buchanan OBE FRSE
ASecuritySite: When Bob Met Alice

Professor of Cryptography. Serial innovator. Believer in fairness, justice & freedom. Based in Edinburgh. Old World Breaker. New World Creator. Building trust.