对称密码和非对称密码算法在无线传感器网络中应用研究  

A Study on the Application of Symmetric Ciphers and Asymmetric Ciphers in Wireless Sensor Networks

作　　者：金宁[1] 张道远[1] 高建桥[1] 王赵峰[1] 

机构地区：[1]中国计量学院信息工程学院,杭州310018

出　　处：《传感技术学报》2011年第6期874-878,共5页Chinese Journal of Sensors and Actuators

基　　金：浙江省科技计划项目(2008C23022)

摘　　要：无线传感器网络许多应用领域需要保证数据获取和传输过程中的安全性。传感器网络节点的计算、存储、通信以及能量等资源十分有限,传统加密算法因计算复杂并占用大量资源而无法直接应用于无线传感器网络。在阐述和分析典型对称加密体制的DES和非对称加密体制中的椭圆曲线密码ECC基础上,基于MICAz无线传感器网络节点平台,对上述两种密码体制在算法时间、空间、能耗和安全性等方面进行了分析和比较。实验结果表明,在算法用时、RAM/ROM占用以及能耗上DES算法占优,而在密钥数量及密钥管理复杂性上ECC占优,两种加密算法适合不同需求的WSNs应用场景。Security issues are badly needed in the data acquiring and transmission in wireless sensor networks which can be widely used in many areas.The traditional complex encryption algorithms could not be directly used in the fields of wireless sensor networks.This is due to the constraints of limited capability of CPU computing,storage space,narrow bandwidth and battery support energy.After analyzing a typical symmetric cipher（e.g.Data Encryption Standard,DES）and an asymmetric cipher（e.g.elliptic curve cryptography）,the CPU executing time,RAM/ROM space and energy consumption of these two cipher algorithms are compared and studied on the platform of MICAz.Experiment result shows that the DES has advantages of its algorithm efficiency,RAM/ROM space and energy consumption,but it is hard to do key management,and is less security compared with elliptic curve cryptography.Either DES or elliptic curve cryptography is application-specific.

关 键 词：无线传感器网络 安全 DES 椭圆曲线密码体制 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]