摘要
结合拉格朗日插值原理和单向哈希函数,提出了一种分布式的组密钥管理方案。该方案采用密钥预置和本地协作的方式实现了组密钥的更新,并对加密多项式分量进行更新,有效地提高了系统的抗合谋攻击能力。理论分析和仿真实验表明,该方案满足前向安全性和后向安全性,且对通信开销和存储开销也有明显地改善。
Based on one-way hash function and Lagrange interpolation method,a distributed group key management scheme is proposed in this paper.The proposed scheme updates the group keys by using the key pre-distribution and the local collaboration,and it updates the encrypted polynomial components,which makes the system have an improved resistance to collusion attack.Our theoretical analysis and simulation results show that our scheme not only has the forward secrecy and backward secrecy,but also can reduce the storage overhead and communication overhead.
出处
《计算机安全》
2013年第1期13-16,共4页
Network & Computer Security
基金
浙江省自然科学基金杰青团队资助项目(R1090138)
信息保障技术重点实验室开放基金资助项目(KJ-11-05)
关键词
组密钥管理
密钥预置
本地协作
加密多项式分量
group key management
key pre-distribution
local collaboration
the encrypted polynomial components
