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基于DLE协议的可认证群密钥协商协议——EAGKA

丁勇;田海博;王育民   

  1. (西安电子科技大学 综合业务网理论及关键技术国家重点实验室, 陕西 西安 710071)

  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:2004-12-20 发布日期:2004-12-20

An authenticated group key agreement protocol based on the DLE protocol--EAGKA

DING Yong;TIAN Hai-bo;WANG Yu-min

  

  1. (State Key Lab. of Integrated Service Networks, Xidian Univ., Xi'an 710071, China)
  • Received:1900-01-01 Revised:1900-01-01 Online:2004-12-20 Published:2004-12-20

摘要: 分析了基于二叉树的可认证群密钥协商协议AGKA,指出了由于该协议中群体成员在协商过程中协商地位不平等而存在的安全缺陷,即一个地位高的成员可能通过使用不同的共享密钥欺骗同一个群中地位低的成员.因此提出了一个基于DLE协议认证的高安全性密钥协商协议——EAGKA协议,使成员间协商地位安全平等,可以很好克服AGKA协议中存在的问题.EAGKA协议适用于安全度较高的群密钥协商场合.

关键词: 群密钥协商, DLE协议, AGKA, EAGKA协议

Abstract: Based on the analysis of the tree-based authenticated group key agreement protocol AGKA, we find a weakness in the protocol which is caused by teh different priority of the group member in the negotiation. The weakness indicates that the prior group members may use different shared keys to cheat other members in the same group. Based on the above analysis, a novel authenticated group key agreement protocol, named the EAGKA, is proposed based on the verification of the DLE protocol. With the EAGKA, all members are absolutely equal and the weakness of AGKA is overcome. It can be applied in groups that require high security.

Key words: group key agreement, DLE protocol, AGKA, EAGKA

中图分类号: 

  • TP393