Practical two-party SM2 signing using multiplicative-to-additive functionality

IF 4.1 2区计算机科学 Q1 COMPUTER SCIENCE, HARDWARE & ARCHITECTURE Computer Standards & Interfaces Pub Date : 2024-09-19 DOI:10.1016/j.csi.2024.103928

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Abstract

Threshold signatures are important tools for addressing issues related to key management, certificate management, and cryptocurrencies. Among them, two-party SM2 signatures have received considerable interest recently. In this paper, we propose a fast and secure online/offline two-party SM2. By employing the re-sharing technique, we have successfully made the online phase of the signing process non-interactive while achieving nearly optimal computational efficiency. Additionally, in the offline phase, there is just a single call to the multiplicative-to-additive functionality based on Paillier encryption. Our protocol is existentially unforgeable under adaptive chosen message attacks in the random oracle model in the presence of a static adversary. Experimental results demonstrate that our proposed scheme outperforms previous similar schemes by approximately a factor of 2 in online computation and a factor of 3 in online communication. Our scheme can be applied in scenarios such as Certificate Authority (CA) and the signing of blockchain transactions to provide them with a more secure and flexible implementation method, enhancing the security and reliability of the systems.

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利用乘加功能进行实用的双方 SM2 签名

阈值签名是解决密钥管理、证书管理和加密货币相关问题的重要工具。其中，双方 SM2 签名最近受到了广泛关注。在本文中，我们提出了一种快速、安全的在线/离线两方 SM2。通过使用重共享技术，我们成功地使签名过程的在线阶段成为非交互式的，同时实现了近乎最佳的计算效率。此外，在离线阶段，只需调用一次基于 Paillier 加密的乘法到加法功能。在静态对手存在的情况下，我们的协议在随机甲骨文模型的自适应选择信息攻击下是不可伪造的。实验结果表明，我们提出的方案在在线计算方面比以前的类似方案优胜约 2 倍，在在线通信方面优胜约 3 倍。我们的方案可应用于证书颁发机构（CA）和区块链交易签名等场景，为它们提供更安全、更灵活的实现方法，提高系统的安全性和可靠性。

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来源期刊

Computer Standards & Interfaces 工程技术-计算机：软件工程

CiteScore

11.90

自引率

16.00%

发文量

审稿时长

6 months

期刊介绍： The quality of software, well-defined interfaces (hardware and software), the process of digitalisation, and accepted standards in these fields are essential for building and exploiting complex computing, communication, multimedia and measuring systems. Standards can simplify the design and construction of individual hardware and software components and help to ensure satisfactory interworking. Computer Standards & Interfaces is an international journal dealing specifically with these topics. The journal • Provides information about activities and progress on the definition of computer standards, software quality, interfaces and methods, at national, European and international levels • Publishes critical comments on standards and standards activities • Disseminates user''s experiences and case studies in the application and exploitation of established or emerging standards, interfaces and methods • Offers a forum for discussion on actual projects, standards, interfaces and methods by recognised experts • Stimulates relevant research by providing a specialised refereed medium.