摘要： 针对目前无线传感器网络密钥预分配模式中固有的安全隐患，提出一个安全的密钥更新协议——随机消息提取。在不产生高能耗的条件下，较好地解决了密钥预分配模式中，随网络存续时间增加，密钥安全性持续降低的问题。该协议对大规模网络提供完全支持。给出安全性分析和模拟实验来进一步说明其实用性。

关键词: 密钥更新, 安全, 电源消耗, 大规模网络

Abstract: Aiming at the security deficiency of the pre-distribution mechanism in the field of key management for Wireless Sensor Network(WSN), a key updating protocol, RME, is proposed for WSN. With low power consumption, this protocol fixes the problem that, the longer the network works, the lower the security standard will decrease. Meanwhile, this protocol provides support for large-scale networks. Security analysis and simulations are constructed to show that RME is practical.

Key words: key updating, security, power consumption, large-scale network

中图分类号: 

• TP393.08