ID-Based Anonymous Multi-receiver Key Encapsulation Mechanism with Sender Authentication

摘要

Identity based (ID-based) key encapsulation mechanism (KEM) is used to encapsulate a symmetric key during the construction of hybrid encryption in the identity based setting. In many situations, the receiver does not want to reveal identity information. So anonymous multi-receiver KEM is needed to solve the problem. In this paper, we present the first ID-based anonymous multi-receiver KEM with sender authentication. We formulate its security model and define the security notions. We present an concrete construction from pairings and the construction is provably secure in the random oracle model.