门限技术在组播密钥管理中的应用

目前组播协议以其节省带宽等优点被广泛认可,但在安全性和可靠性方面存在着一些问题。针对组播应用中所涉及到的密钥管理问题,提出一种运用动态门限技术和组播安全代理结合的方案,通过构建一个IP组播安全管理系统来实现组播密钥的分发和恢复,进而讨论了由成员加入和退出引起的密钥更新问题,最后针对该系统给出实验测试并讨论了采用此方案引起的更新代价,说明采用该方案可以较好地解决组播应用中的授权管理问题,实现安全组播。

Application of Threshold Technology in Multicast Key Management

Nowadays,multicast has been widely approved for its advantages of bandwidth-saving,and however,there are still some problems in security and reliability. For multicast applications in the key management issues,this paper proposes a scheme in integration of dynamic threshold technology and multicast security agent. The multicast key distribution and recovery could be achieved by constructing an IP multicast security management system. And then the key update problem caused by the members＇ joining or leaving is discussed in this paper. Finally an experimental test on the system is given,including the cost caused by the updating. All these indicate that the scheme is a fairly good solution to authorized management in multicast applications,and could achieve secure multicast.