关键词: 组播安全, 组播密钥管理, 私钥独立性, 广义猫映射, 单向函数

Abstract: It is indicated that Cao Guoliang et al's multicast key management scheme based on generalized cat map does not satisfy the independent security requirement of individual keys of group members. A modification scheme was proposed by using one way function. The presented scheme satisfies the independent security requirement of individual keys of group members. Compared with Cao Guoliang et al's scheme, this modification scheme has higher security and lower computation and communication overheads.

Key words: multicast security, multicast key management, independence of individual key, generalized cat map, one way function