A Novel Identity-Based Key Management and Encryption Scheme for Distributed System

Geng Yang, Qiang Zhou, Xiaolong Xu, Jian Xu, Chunming Rong

Abstract: The paper proposes a Distributed Identity-Based Encryption (DIBE) scheme. The DIBE scheme extends the traditional IBE to a distributed system which consists of some homogenous or heterogeneous subsystems. Each subsystem has its own different master key and can communicate each other in a secure mode, instead of sharing a common master key as that in a traditional IBE scheme. The paper presents and analyzes the key distributing algorithms for a subsystem to join or leave a system, and also a user to joining or leave a subsystem. It shows that the DIBE scheme has the properties of scalability and adaptability. The paper also analyzes the security and performance of the proposed scheme, including the correctness, complexity and application examples. Some simulation results demonstrate the performance of the DIBE by using the PBC function packet.