## Bulletin of the Belgian Mathematical Society - Simon Stevin

The Bulletin of the Belgian Mathematical Society — Simon Stevin aims to publish high level Research Papers in all areas of Mathematics and Expository Papers for a large audience presenting significant aspects of Pure and Applied Mathematics.

Simple Zero-Knowledge Proof of Knowing $\sqrt{X_1}$ or $\sqrt{X_2}$ mod $N$Volume 16, Number 1 (2009)