Officer of the Order of Canada

• Awarded on: November 15, 2000
• Invested on: October 17, 2001

He is internationally renowned for his seminal work in the area of graph theory. As a young mathematician and codebreaker, he deciphered a series of German military encryption codes known as FISH. This has been described as one of the greatest intellectual feats of World War II. Distinguished Professor Emeritus and Honorary Director of the Centre for Cryptographic Research at the University of Waterloo, he remains one of the most influential figures in combinatorics.