title: Chris Hall (cryptographer)
text: # Chris Hall (cryptographer)
  
  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 in Mathematics from Princeton University in 2003, under Nick Katz.
  
  He is an associate professor of mathematics at the University of Western Ontario.
  
  