Establishment of Authenticated Secret Session Keys Using Digital Signature Standard

摘要

A scheme for establishing authenticated Diffie-Hellman based shared keys using Digital Signature Standard (DSS). A similar technique with one random variable was proposed earlier, and it was found that such system with one random variable is not well secured. Subsequently, it was pointed out that at least two random variables are required for satisfying three cryptographic properties of authenticity, security, and uniqueness of the session keys established. In this work, a new approach for establishing authenticated secret session keys using two random numbers is presented. An in-depth analysis of the proposed scheme for the three cryptographic properties of authenticity, security, and uniqueness has been done, and no such weakness has been found.