Identity-based broadcasting

Abstract

In this paper, we introduce a new concept called "Identity-Based Broadcasting Encryption" (IBBE), which can be applied to dynamic key management in secure broadcasting. Based on this new concept, in the proposed system a broadcaster can dynamically add or remove a user to or from the receiver group without any involvement of users. We classify our systems into three different scenarios and give three provably secure and elegant constructions of IBBE system based on the pairing. Our system naturally suits multi-group broadcasting, where a message can be selectively broadcasted to certain groups of users. © Springer-Verlag Berlin Heidelberg 2003.