一种具有前向安全性的短签密方案  

A SHORT SIGNCRYPTION SCHEME WITH FORWARD SECURITY

作　　者：林楠 夏萍萍 左黎明 Lin Nan;Xia Pingping;Zuo Liming(Electric Power Research Institute,State Grid Jiangxi Electric Power Co.,Ltd.,Nanchang 330096,Jiangxi,China;School of Science,East China Jiaotong University,Nanchang 330013,Jiangxi,China;Institute of Systems Engineering and Cryptography,East China Jiaotong University,Nanchang 330013,Jiangxi,China)

机构地区：[1]国网江西省电力有限公司电力科学研究院,江西南昌330096 [2]华东交通大学理学院,江西南昌330013 [3]华东交通大学系统工程与密码学研究所,江西南昌330013

出　　处：《计算机应用与软件》2019年第11期306-310,321,共6页Computer Applications and Software

基　　金：国家自然科学基金项目(11361024);江西省教育厅科技项目(GJJ161417,GJJ170386);江西省交通运输厅科技项目(2017D0037);国网江西省电力有限公司科技项目(52182017001L)

摘　　要：针对目前存在的通信带宽受限、传输不稳定、硬件计算能力弱、数据交互安全性差等问题,提出一种新的基于双线性对的高效短签密方案.采用定期更新随机数作为秘密值,关联公开参数定期更新,使得方案具有前向安全性.在该方案的验证过程中无需泄露接收者的私钥,使得获得发送者私钥的攻击者不能得到秘密消息,实现了可公开验证性.讨论方案的机密性,并在随机预言机下基于逆CDH问题困难假设证明方案的不可伪造性.随后与同类方案进行了效率比较,结果表明方案计算量较小且签密长度较短,适用于各种带宽受限同时需要保证来源的可靠性和数据安全性的应用场合.To solve the problems such as limited communication bandwidth,unstable transmission,weak hardware computing capabilities and poor data interaction security in recent years,we proposed a new short signcryption scheme based on bilinear pairings.The scheme uses regularly updated random numbers as secret value,and associated public parameter was regularly updated,making the scheme forward security.During the verification of this scheme,it was not necessary to reveal the receiver s private key,making it impossible for an attacker who obtained the sender s private key to obtain a secret message,achieving public verifiability.We discussed that the scheme satisfied the confidentiality and proved that the scheme was based on the assumption of the modified inverse CDH problem under the random oracle.Then we compared the efficiency with the similar schemes.The results show that the program has a small amount of computation and the signcryption length is very short.It is suitable for applications where the bandwidth is limited and reliability of the source and data security need to be guaranteed.

关 键 词：短签密 双线性对 前向安全性 机密性 可公开验证性 

分 类 号：TP393.08[自动化与计算机技术—计算机应用技术]