基于椭圆曲线ElGamal代理加密机制的MANET组密钥分发方案  

A NEW ECC ELGAMAL PROXY ENCRYPTION-BASED GROUP KEY DISTRIBUTION SCHEME FOR MANET

作　　者：肖自金 周海[1] 吴丽珍[2] 

机构地区：[1]甘肃广播电视大学教务处,甘肃兰州730030 [2]兰州理工大学电子工程与信息工程学院,甘肃兰州730050

出　　处：《计算机应用与软件》2013年第3期139-144,共6页Computer Applications and Software

基　　金：甘肃省自然科学基金项目(0809RJZA019)

摘　　要：针对MANET网络中大规模安全组通信系统的特点,提出一种新的分散式组通信密钥分发方案。该方案基于轻量级的椭圆曲线ElGamal代理加密机制,克服了以往基于代理的密钥管理方案中存在的中间节点知道传输密文的缺点,能够为组通信密钥的分发和更新提供全程私密性保护,解决了第三方节点的可信任问题。安全性与性能分析表明,该方案具有良好的可扩展性和可靠性;能够满足前向安全性和后向安全性;与Chiu等其它方案相比,该方案执行效率比较高,能够有效地节省计算资源和通信带宽,非常适合于MANET网络。According to the characteristics of large-scale secure group communication system for MANET,we propose a new distributed group communication key distribution scheme.This scheme is designed based on the lightweight ElGamal proxy encryption mechanism using ECC（elliptic curve cryptography）,overcomes the shortcoming of the secure plaintext known to the intermediate proxy nodes in past proxy-based schemes,offers the whole privacy protection for group communication in key distribution and update procedure,solves the trustworthy problem of the third-party node.Security and performance analysis show that the scheme has good scalability,reliability and perfect forward secrecy and backward secrecy of group key;compared with other schemes in Chiu et al,this scheme is more efficient,can effectively save the computing resources and communication bandwidth,and is very suitable for MANET.

关 键 词：安全组通信 密钥管理 MANET ElGamal代理加密 椭圆曲线 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]