安全多播密钥更新性能分析  

Analysis of Performance on Rekeying of Multicast Security

作　　者：李辉[1] 

机构地区：[1]河南科技大学,河南洛阳471003

出　　处：《计算机技术与发展》2009年第7期187-190,共4页Computer Technology and Development

基　　金：教育部博士点基金资助项目(20070614008)

摘　　要：随着Internet的发展,多播作为面向组应用的一种高效的通信机制被广泛应用。为了提供安全多播,当新成员加入或者成员离开系统,通信加密密钥就必须改变。目前,密钥图的方案已经被提出,其中树形结构密钥图和星型结构是两种重要类型。分析树形结构的密钥图和星形结构的密钥图独立更新方式带来的更新代价,重点分析基于这两种结构批量更新的性能。得出结论:离开和加入请求相对较少时,树形结构有较好的性能,请求较多的情况的星型结构较为适合。With the rapid development of Internet, many emerging Web applications are based on a group communication model. The secure group communication has become an important issue. At present, key graph approach has been proposed for group management. Key tree and key star are two important types of key graph. In the paper, analyzed the individual rekeying on key tree and key star and the server＇ cost on batch rekeying of key tree and key star.Draw a conclusion that when the number of requests in a batch is not large, key tree is better;otherwise,key star （a special key tree with root degree equal to group size） outperforms small- degree key trees.

关 键 词：密钥图 树形结构密钥图 星型结构密钥图 独立更新 批量更新 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]