Distributed Key Management Scheme Based on CL-PKC in P2P Networks

P2P networks have characteristics of decentralization, autonomy, and dynamicity. The security problems caused by these characteristics have seriously affected further development of P2P networks. The authors did research on CL-PKC key management schemes. (1) They propose a certificateless-based key distribution scheme with multiple trusted centers that fits the characteristics of P2P networks, and analyzed its security. (2) They also propose an improved interactive key agreement protocol across multiple domains, and then compare it with some existing key agreement protocol from aspects of security and computational efficiency. (3) The authors have implemented the proposed key management schemes, then verified their correctness and tested their computational efficiency. Combined with master key share management and key management of nodes, this system constructed a complete certificateless-based key management model, which is an exploration to solve security problems in P2P networks.