摘要
为了提供密钥认证并降低开销,将三叉树引入到群密钥协商中,使计算开销降低到O(log3n).通过引入群长期密钥(群公钥证书)为密钥树中的内部节点提供身份信息,并在群密钥中结合了成员和群的长期密钥及临时密钥,该方案提供了隐含密钥认证,能够抵抗主动攻击.该设计思想可以作为把可认证的两方和三方密钥协商协议扩展到多方的一种通用方法.
Triple tree is introduced into group key agreement schemes, which reduces the computational cost to O（log3n）. Group public key certification is used to provide identity information for internal nodes. Group members＇ and the group＇s long-term and short-term keys are combined in the group key. The proposed scheme provides implicit key authentication. The idea can be made use of as a general method to extend authenticated two-party and three-party key agreement protocols to group settings.
出处
《北京理工大学学报》
EI
CAS
CSCD
北大核心
2005年第8期714-717,共4页
Transactions of Beijing Institute of Technology
基金
国家自然科学基金资助项目(60203012)
