Exchange Secure Digital Signatures Using Rsa Algorithms

Abstract

This research paper proposes a new contract-signing procedure for two mutually distrusted parties. Our protocol is based on an RSA multi-signature, which is formally proved to be secure. Our protocol is fair and optimistic. Furthermore, different from the above existing schemes, our protocol is abuse-free. The motivation is that we integrate an interactive zero-knowledge procedure, proposed for confirming RSA undeniable signatures, into our scheme to prove the validity of the intermediate results. Moreover, we exploit trapdoor commitment schemes to enhance this zero-knowledge protocol so that the abuse-freeness property can be fully achieved. Technical analysis and discussion are provided in detail to show that our scheme is secure and efficient.