基于限高树的TGDH组密钥管理协议

组密钥管理是组通信安全的核心问题。目前研究的组密钥管理方案大都源于树状结构,而限高树密钥结构能够通过限制树的高度来保证组密钥管理协议的性能。提出了采用限高树密钥结构的分布式TGDH组密钥管理协议。

无线传感器网络的组密钥更新算法

提出了一种适用于无线传感器网络的基于改进密钥链接树的组密钥更新算法。通过在基于密钥链接树的组密钥管理方案中引入问题密钥路径,并延迟这些问题密钥路径上的密钥更新操作,从而减少密钥链接树中辅助节点上的重复密钥更新。实验结果表明,与现有的组密钥管理方案相比,基于改进密钥链接树的组密钥更新算法在节点添加和删除操作时产生更少的密钥更新消息和消耗更少的能量。

组密钥更新算法性能研究

研究了树状和链树状两种结构的组密钥更新算法的性能优势,提出了链树状结构和树状结构结合使用的组密钥管理方法,并利用转换算法解决了链树状结构向树状结构转换的问题.通过分析证明,新算法比单独使用树状结构或链树状结构的算法效率都高.

基于限高树的分布式LKH

组密钥管理是组通信安全的核心问题,目前研究的组密钥管理方案大都源于状结构(LKH),而限高树密钥结构能够通过限制树的高度来保证组密钥管理协议的性能。本文提出了采用限高树密钥结构的分布式LKH组密钥管理协议。

A new group key management scheme based on keys tree, XOR operation and one-way function

By introducing XOR operation and one-way function chains to group key management schemes based on the keys tree, a new group key management scheme based on the keys tree, XOR operation and one-way function chains is proposed. Initialization, member adding and member evicting operations are introduced. The new scheme is compared with three other group key management schemes which are based on the keys tree： SKDC, LKH, and OFF. As far as transmission, computation and storage costs are concerned, the performance of the new group key management scheme is the best. The security problem of the new scheme is analyzed. This new scheme provides backward and forward security, i.e.. newly admitted group members cannot read previous multicast messages and evicted members cannot read future multicast messages, even with collusion by many arbitrarily evicted members.

SECURE GROUP COMMUNICATIONS FOR LARGE DYNAMIC MULTICAST GROUP

As the major problem in multicast security, the group key management has been the focus of research But few results are satisfactory. In this paper, the problems of group key management and access control for large dynamic multicast group have been researched and a solution based on SubGroup Secure Controllers (SGSCs) is presented, which solves many problems in IOLUS system and WGL scheme.