基于ECC的动态安全组播密钥协商方案

KEY AGREEMENT SCHEME BASED ON ELLIPTIC CURVE CRYPTOSYSTEM FOR DYNAMIC SECURE MULTICAST

设计高效的密钥协商方案是动态安全组播的难点。提出一个应用椭圆曲线密码体制进行密钥协商而在基于身份的公钥系统内进行组通信的全新安全组播方案。具体地分析了子组成员的密钥协商和子组间的通信过程,以及组成员动态变化时密钥的更新过程,结果表明,该方案在降低计算和通信代价方面取得了较好的效果,且满足密钥协商的安全要求。

Designing key management is a difficult task in dynamic secure muhicast. In this paper, we propose a novel secure muhicast scheme with key agreement based on Elliptic Curve Cryptosystem and group communication inside Identity-based Public Key Cryptography system. Then the key agreement between the members in a subgroup and the procedures of secret communications between subgroups as well as updating of group keys with the dynamic change of group members are analyzed in detail. The analysis shows that our scheme is efficient in computation and communication and satisfies the security requirement of the key agreement.