Simple ID-Based Key Distribution Scheme

A key distribution scheme is used to distribute a session key for broadcasting systems(multicast communications). None of the existing key distribution schemes with the exception of the Jeong-Kwon-Lee key distribution scheme provide both security against session state reveal attacks and security against long-term key reveal attacks. Unfortunately, the Jeong-Kwon-Lee key distribution scheme suffers from three disadvantages in terms of efficiency unlike the existing schemes: (1) Unscalability for the dynamic user group, (2) Abuse of cryptographic algorithms, and (3) Inefficiency. In this paper, we propose an ID-based key distribution scheme which is secure against session state reveal attacks and long-term key reveal attacks. Also, our scheme offers the scalability, non-usage of additional cryptographic algorithms, and efficiency similar to those of the existing schemes.