Adi Shamir received an honorary DMath Degree

Professor Shamir is best known for his invention, with Ron Rivest and Len Adleman, of the Rivest-Shamir-Adleman (RSA) public-key encryption and digital signature schemes in 1977. RSA is the critical technology that provides the security features of many standardized communication systems, including the Secure Sockets Layer protocol used to secure web-based electronic commerce and the Secure/Multipurpose Internet Mail Extensions standard for secure email. For the past twenty years, RSA has been taught in the first-year algebra course in the University of Waterloo's Faculty of Mathematics.

Adi Shamir (PDF).