无线传感器网络中自修复密钥颁布机制中滑动窗口的动态性探讨  

Exploring the Dynamic of Sliding Window for Self-Healing Key Distribution Schemes in Wireless Sensor Networks

作　　者：孙新江[1] 吴晓蓓[1] 黄成[1] 徐志良[1] 

机构地区：[1]南京理工大学自动化学院,江苏南京210094

出　　处：《电子学报》2015年第3期447-453,共7页Acta Electronica Sinica

基　　金：教育部博士点专项目基金咨助项目(No.20113219110028);江苏省自然科学基金资助项目(No.BK2012803)

摘　　要：在很多自修复密钥颁布机制中,滑动窗口大小影响着密钥的修复性能和通信开销.本文利用概率知识,首次建立了滑动窗口和丢包率对节点密钥同步性能、组安全关联性能和安全服务性能的数学模型.设计了适应链路动态变化特性的滑动窗口选择机制,采用查找表方式优化了计算和存储开销.仿真验证了该机制具有动态适应性,可以高概率的保证网络的安全服务性能.与已有机制相比,所提机制显著降低了通信开销,具有可行性和高效性,进一步推动了自修复密钥颁布机制的实际应用.In many self-healing key distribution schemes, the size of sliding window affects both the self-healing capability and the communication overhead. With probability knowledge, the mathematical model is built, which reflects the influence of the size of sliding-window and packet loss rate on the performance of key synchronization, group security association and security ser- vice. Then, an adjuslment mechanism of sliding window is proposed to adapt to the dynamic change of broadcast links, and a look- up table is utilized to reduce the computation and storage overhead. Simulation results show that the scheme proposed is dynamically adaptive, and guarantees the performance of security service with high probability. Compared with the existing schemes, the proposed scheme greatly reduces the communication overhead, and is more feasible and efficient. Meanwhile, it further promotes the application of serf-healing key distribution.

关 键 词：无线传感器网络 自修复密钥颁布 滑动窗口 动态链路 丢包率 自适应 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]