基于SM2的强前向安全性两方共同签名方案
Two-party co-signature scheme based on SM2's strong forward security
薛庆水 1卢子譞 1马海峰 1高永福 1谈成龙 1孙晨曦1
作者信息
- 1. 上海应用技术大学计算机科学与信息工程学院,上海 201418
- 折叠
摘要
现存SM2数字签名研究已不能满足长期使用主私钥的安全.为更好保证成员私钥安全,结合两方共同签名与SM2算法,在现存方案的基础上加入强前向安全性,无可信中心,可避免可信中心权威欺诈与长期使用主私钥被窃取问题.该方案具有3个特点:前向安全性、后向安全性、无可信中心.方案需要两轮通信,线上两方各需要一次标量乘,保持高效率不变的同时,使得攻击者难以窃取成员密钥,更好保证成员长期使用密钥的安全性.
Abstract
The existing research on SM2 digital signatures can no longer meet the security requirements of long-term use of the master private key.To better ensure the security of members'private keys,a strong forward security was added on the basis of the existing scheme by combining the two parties'co-signature and SM2 algorithm.There was no trusted center,avoiding the trusted center's authority fraud and the long-term use of the master private key to be stolen.The scheme had three characteris-tics including forward security,backward safety and no trusted center.The scheme required two rounds of communication,and each party on the line needed a scalar multiplication.While keeping the efficiency unchanged,the scheme made it difficult for at-tackers to steal the member key,so as to better ensure the security of members'long-term use of the key.
关键词
SM2/共同签名/强前向安全性/Shamir/秘密共享方案/秘密分割/有限状态机Key words
SM2/co-signature/strong forward security/Shamir/secret sharing scheme/secret segmentation/finite state machine引用本文复制引用
基金项目
国家自然科学基金项目(61672350)
国家自然科学基金项目(61170227)
上海应用技术大学协同创新基金项目(39120K178038)
教育部人文社科基金项目(14YJA880033)
国家社会科学基金项目(16BGL003)
出版年
2024
NETL
NSTL
万方数据