摘要
为了解决区块链交易过程中的隐私泄漏问题,对 SM9 标识密码算法进行改进,提出了基于身份认证的多KGC 群签名方案.以联盟链为基础,设计了基于 SM9 算法可证明安全的区块链隐私保护方案,并对以上方案进行安全性与效率分析.通过分析证明,方案具有签名不可伪造、保证节点匿名及前向安全等特性.通过效率分析:该方案较Al-Riyami 等人提出的无证书签名方案减少 2 次双线性对运算,验签效率提高约 40%;较 Tseng 等人与 Chen 等人提出的方案分别减少 4 次与 2 次指数运算,计算效率整体得到提高.该方案通过多 KGC 群签名保护交易双方的用户身份,实现在节点间进行身份验证的同时,保护了节点的隐私.
In order to solve the problem of privacy leakage in the transaction process of block chain, by improving the SM9 identification cryptography algorithm, a multi KGC group signature scheme based on SM9 algorithm was proposed for the first time. Based on the alliance chain, a privacy preserving scheme in block chain with provably secure was designed based on SM9 algorithm. By analyzing the security and efficiency about this scheme, it is proved that the proposed scheme has many advantages, such as signature unforgery, the node anonymity, forward security, and so on. By analyzing the efficiency, the proposed scheme decreases twice bilinear pairing operations compared with the certificateless signature scheme proposed by Al-Riyami S Ss’, and the efficiency of signature verifying is increased by about 40%. Moreover, the proposed scheme cuts down four times and twice exponent operations compared with schemes of Tseng Y Ms’ and Chen Ys’, the overall calculation efficiency is improved. The user identity of two parties can be protected by the cryptographic operation, and the privacy preserving of the nodes is achieved.
作者
杨亚涛
蔡居良
张筱薇
袁征
YANG Ya-Tao;CAI Ju-Liang;ZHANG Xiao-Wei;YUAN Zheng(Departmentof Electronics and Communications Engineering, Beijing Electronics Science & Technology Institute, Beijing 100070,China;Department of Cryptography Science and Technology, Beijing Electronics Science & Technology Institute, Beijing 100070, China;School of Communication Engineering, Xidian University, Xi’an 710071, China)
出处
《软件学报》
EI
CSCD
北大核心
2019年第6期1692-1704,共13页
Journal of Software
基金
“十三五”国家密码发展基金(MMJJ20170110)~~
关键词
联盟区块链
无证书公钥密码体制
双线性对
群签名
可证明安全
alliance block chain
certificateless public key cryptography
bilinear pairing
group signature
provable security
