一种应用门限与团体控制的组播密钥管理方案

Scheme of the Multicast Key Management Based on Threshold Cryptography with Quorum Control Strategy

组播密钥管理是解决组播安全性的关键技术之一,针对集中式密钥方案在组播通信中GC存储代价负荷过高的问题,提出一种新型的基于门限密码体制与团体控制策略的集中式密钥管理机制(Threshold with Quorum Control,简称TQC).对TQC进行了详细的分析设计与研究,并给出了具体应用实例.通过理论分析和模拟仿真验证,从存储代价、通信代价、计算代价和组播安全性4个方面对TQC方案进行了综合评价,并与传统的LKH组播密钥管理方案进行了综合性能的比较和分析.结果表明TQC方案在一定程度上缓解了集中式密钥管理方案的单点性能瓶颈问题,大大地减轻了GC的存储代价开销.

With the fast development of Internet, The technology of multicast has been applied broadly. The multicast key management is the key point to solve the security problem of multicast. The paper proposed a novel type of centralized key management mechanism based on the threshold cryptography with quorum control strategy after an in-depth study to traditional key management schemes, Through the theoretical analysis and simulation verification, the paper presented a comprehensive evaluation for our scheme. The experiment results indicate that this scheme can ease the issue of single-point performance bottlenecks to a certain extent and greatly reduce the cost of GC storage overhead.