Christopher Hall is an American cryptographer and mathematician, specializing in arithmetic geometry. He is one of the creators of the cryptosystem Twofish. He obtained a BS from the University of Colorado-Boulder Department of Computer Science and a

PhD PHD or PhD may refer to: * Doctor of Philosophy (PhD), an academic qualification Entertainment * '' PhD: Phantasy Degree'', a Korean comic series * ''Piled Higher and Deeper'', a web comic * Ph.D. (band), a 1980s British group ** Ph.D. (Ph.D. albu ...

in Mathematics from Princeton University in 2003, under Nick Katz. He is an associate professor of mathematics at the University of Western Ontario.

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* American cryptographers Living people Year of birth missing (living people) Princeton University alumni University of Western Ontario faculty {{crypto-bio-stub