网络与信息安全学报2024，Vol.10Issue(2)：59-68,10.DOI:10.11959/j.issn.2096-109x.2024024
可证明安全的SM2盲适配器签名方案
Proven secure blind adaptor signature scheme based on the SM2
摘要
Abstract
Adaptor signature(AS)is a novel cryptographic primitive that has gained prominence in recent years for its ability to link the signature process with the revelation of a secret value.The process involves adapting a pre-signature to a formal signature,ensuring that the final signature result aligns with conventional signatures.Both the pre-signature and the formal signature are capable of extracting a secret value,which endows AS with atomicity and suggests its promising application within blockchain technologies.However,the lack of anonymity in AS can lead to the exposure of transaction participants'identities,which may limit its application in scenarios demanding high privacy standards,such as electronic payments.To address this issue,a new blind adaptor signature system model and security model were proposed.Subsequently,a blind adaptor signature scheme was developed based on the SM2 signature algorithm,leveraging the new system model.The security of this new scheme,which was founded on the unforgeability and the hardness of the SM2 signature scheme,was demonstrated to meet the requirements of the newly proposed security model.Specifically,the scheme was proven to satisfy properties such as blindness,pre-signature adaptability,unforgeability,and witness extractability.Performance analysis indicates that the computational overhead of the SM2 blind adaptor signature scheme is minimal,with the total operation time of the signature process only increasing by a negligible 5.91ms compared to the SM2 adaptor signature scheme.Moreover,when compared to existing similar schemes,the SM2 blind adaptor signature scheme offers enhanced blindness and autonomy,making it particularly valuable for key application scenarios that necessitate high privacy requirements and the utilization of domestic cryptographic algorithms.关键词
SM2数字签名/盲适配器签名/原子性/匿名性Key words
SM2 digital signature/blind adaptor signature/atomicity/anonymity分类
信息技术与安全科学引用本文复制引用
胡小明,陈海婵..可证明安全的SM2盲适配器签名方案[J].网络与信息安全学报,2024,10(2):59-68,10.基金项目
上海市科委扬帆计划项目(No.20YF1414400)Shanghai Sailing Program(No.20YF1414400) （No.20YF1414400）
