安全加密的门限签名混淆  

Secure obfuscation for encrypted threshold signatures

作　　者：李亚红 王彩芬 张玉磊 杨小东 黄海燕 LI Yahong;WANG Caifen;ZHANG Yulei;YANG Xiaodong;HUANG Haiyan(College of Telecommunication Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China;College of Computer Science and Engineering,Northwest Normal University,Lanzhou 730070,China;College of Big Data and Internet,Shenzhen Technology University,Shenzhen 518118,China)

机构地区：[1]兰州交通大学电子与信息工程学院,甘肃兰州730070 [2]西北师范大学计算机科学与工程学院,甘肃兰州730070 [3]深圳技术大学大数据与互联网学院,广东深圳518118

出　　处：《通信学报》2020年第6期61-69,共9页Journal on Communications

基　　金：国家自然科学基金资助项目(No.61063041,No.61901201);兰州交通大学青年科学基金资助项目(No.2018002)。

摘　　要：针对门限签名密钥泄露的安全问题,首先提出了一个加密门限签名功能,并对所提功能混淆,混淆电路的输出可交给任意第三方执行,不会泄露门限签名密钥的信息。然后定义了加密门限签名功能和混淆器的安全模型,存在不可伪造性和平均情况虚拟黑盒性质,并对其正确性和安全性进行证明。理论和仿真实验分析表明,对加密门限签名的混淆具有可行性。Aiming at the key leakage security problem of the threshold signature,an encrypted threshold signature functionality was firstly proposed and securely obfuscated.The output of obfuscated circuit could be implemented by any third party without revealing the private key of threshold signature.Secondly,the security models of encrypted threshold signature functionality and the obfuscator were defined,such as the existential unforgeablity and the average case virtual black box property,and its correctness and security were proved.The analyses of theory and simulation experiment show that the obfuscation for encrypted threshold signature has feasibility.

关 键 词：混淆 加密门限签名 加密私钥 平均情况虚拟黑盒性质 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]