摘要： 根据无线群组通信的特点，基于同态加密机制采用集中式与分布式管理相结合的方法，提出一种新的安全无线群组密钥分配协议。该协议提供群组成员的认证和匿名性，具有前向保密性和后向保密性。协议初始化阶段完成了大部分计算，减少用户终端在协议执行过程中的计算量，满足无线群组通信的实时要求。分析表明，新协议安全性高，计算复杂度低，实时性好，简单且易于实现，适用于无线网络环境。

关键词: 无线网络, 安全, 群组通信, 密钥分配

Abstract: According to the feature of wireless group communication, a new group key distribution protocol in wireless network is proposed based on homomorphic encryption scheme. The scheme can realize member node authentication, anonymous identity, forward privacy and backward privacy. Calculation in advance introduced in initialization phase reduces the calculation cost of terminal in the process of execution, and satisfies real time request of wireless group communication. Moreover, performance of the scheme is analyzed. Result shows that the scheme has higher security, lower complexity, which satisfies the requirements of wireless network.

Key words: wireless network, security, group communication, key distribution

中图分类号: 

• TP309