Victor Shoup is a computer scientist and mathematician. He obtained a PhD in computer science from the University of Wisconsin–Madison in 1989, and he did his undergraduate work at the University of Wisconsin-Eau Claire. He is currently a professor at the Courant Institute of Mathematical Sciences at New York University. He has previously held positions at AT&T Bell Labs, the University of Toronto, Saarland University, and the IBM Zurich Research Laboratory.
- The Cramer–Shoup cryptosystem asymmetric encryption algorithm bears his name.
- His freely available (under the terms of the GNU GPL) C++ library of number theory algorithms, NTL, is widely used and well regarded for its high performance.
- He is the author of a widely used textbook, "A Computational Introduction to Number Theory and Algebra", which is freely available online.
- He has proved (while at IBM Zurich) a lower bound to the computational complexity of generic algorithms for solving the discrete logarithm problem, a problem in group theory which is of considerable importance to public-key cryptography.
- He is presently closely involved in the development of an emerging ISO standard for public-key cryptography.