Ring adaptor signature scheme based on SM2 digital signature algorithm

Xu Xinyue; Xu Shujiang; Wang Lianhai; Zhang Shuhui; Shao Wei; Wang Qizheng

doi:10.11959/j.issn.2096-109x.2026003

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Ring adaptor signature scheme based on SM2 digital signature algorithm

Column: Computing Power Network Security | 更新时间：2026-05-26

- Ring adaptor signature scheme based on SM2 digital signature algorithm
- Chinese Journal of Network and Information Security Vol. 12, Issue 1, Pages: 164-178(2026)
- 作者机构：
  
  1.齐鲁工业大学（山东省科学院）山东省计算中心（国家超级计算济南中心），算力互联网与信息安全教育部重点实验室，山东济南 250014
  2.山东省基础科学研究中心（计算机科学），山东省工业网络与信息系统安全重点实验室，山东济南 250014
- 作者简介：
- 基金信息：
  
  The Shandong Provincial Key Research and Development Program(2025CXPTWZ003;WSR2024004);The Taishan Scholars Program(tsqn202312231);Natural Science Foundation of Shandong Provincial(ZR2024MF104;ZR2023QF129);The New 20 Project of Higher Education of Jinan(202228017);The Pilot Project for Integrated Innovation of Science, Education, and Industry of Qilu University of Technology (Shandong Academy of Sciences)(2024ZDZX08)
- DOI：10.11959/j.issn.2096-109x.2026003
  CLC： TP309
- Received：04 March 2025，
  
  Revised：2025-09-23，
  
  Published：25 February 2026
- 稿件说明：
移动端阅览
许馨月, 徐淑奖, 王连海, 等. 基于SM2数字签名算法的环适配器签名方案[J]. 网络与信息安全学报, 2026, 12(1): 164-178.

Xu Xinyue, Xu Shujiang, Wang Lianhai, et al. Ring adaptor signature scheme based on SM2 digital signature algorithm[J]. Chinese Journal of Network and Information Security, 2026, 12(1): 164-178.
许馨月, 徐淑奖, 王连海, 等. 基于SM2数字签名算法的环适配器签名方案[J]. 网络与信息安全学报, 2026, 12(1): 164-178. DOI： 10.11959/j.issn.2096-109x.2026003.

Xu Xinyue, Xu Shujiang, Wang Lianhai, et al. Ring adaptor signature scheme based on SM2 digital signature algorithm[J]. Chinese Journal of Network and Information Security, 2026, 12(1): 164-178. DOI： 10.11959/j.issn.2096-109x.2026003.

摘要

适配器签名能够在不依赖可信第三方的情况下保障跨链交易的原子性，但大多数适配器签名算法无法保障用户身份的隐私性。尤其是多数方案并非基于国产密码算法设计，这些方案自主可控性差。针对上述问题，提出了基于SM2数字签名算法的环适配器签名方案。签名者首先利用环签名生成预签名；预签名验证通过后，将预签名与一个秘密值结合，进而适配为完整签名；任何拥有预签名及其完整签名的用户可以提取出秘密值。该环适配器签名方案在预签名阶段利用环签名的性质保障签名者身份的隐私性，同时利用适配器签名保障交易的原子性，兼具身份隐私保护及交易原子性的优异特性。其安全性可规约到离散对数困难问题。在随机预言机模型下，证明了该方案满足预签名可适配性、预签名正确性、选择消息攻击下的存在不可伪造性、证据可提取性和匿名性。理论分析表明，该环适配器签名方案与现有环适配器签名方案的时间开销及通信开销相当。该方案极大地拓展了国密签名算法在环适配器签名领域的应用，尤其适用于跨链支付等隐私保护领域。

Abstract

Adaptor signature can guarantee the atomicity of cross-chain transactions without relying on trusted third parties

but most adaptor signature algorithms fail to protect the privacy of user identities. Moreover

most of these schemes are not based on domestic cryptographic algorithms

resulting in poor autonomy and controllability. To address these issues

a ring adaptor signature scheme based on the SM2 digital signature algorithm was proposed. The signer first generates a pre-signature using a ring signature; after the pre-signature is verified

it is combined with a secret value to adapt to a complete signature; any user with the pre-signature and its complete signature can extract the secret value. This ring adaptor signature scheme uses the properties of ring signatures to protect the privacy of the signer's identity in the pre-signature stage

while using adaptor signatures to ensure the atomicity of transactions

and combines the excellent characteristics of both identity privacy protection and transaction atomicity. Its security can be reduced to the discrete logarithm problem. Under the random oracle model

it was proved that the proposed scheme satisfies pre-signature adaptability

pre-signature correctness

existential unforgeability under chosen message attacks

witness extractability

and anonymity. Theoretical analysis shows that the time and communication overhead of this ring adaptor signature scheme is comparable to that of existing ring adaptor signature schemes. This scheme greatly expands the application of domestic cryptographic signature algorithms in the field of ring adaptor signatures

which is especially pertinent to the field of privacy protection in cross-chain payments.

关键词

Keywords

references

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