基于群签名和同态加密的多敏感属性数据重发布隐私保护方法

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关键词： 群签名； 同态加密； 多敏感属性数据； 重发布； 隐私保护； 优先级； 批验证中图分类号：TN915.08⁃34；TP311 文献标识码： A 文章编号：1004⁃373X（2025）12⁃0072⁃05

Abstract：The method of multi ⁃ sensitive attribute data republication privacy protection based on group signature and homomorphic encryption is proposed to ensure data sharing and utilization while protecting personal privacy from leakage. Under the constructed model of multi ⁃ sensitive attribute data republication privacy protection based on group signature and homomorphic encryption， after the initialization stage generates the group public key and group private key， a trusted third party can be used to complete the fragmentation of the group private key and distribute it to the group administrator. The group administrators can introduce new members by verifying the security of the member certificate and collaborate with the trusted third party to generate the group member public and private keys by means of the homomorphic encryption algorithm. The group members complete the signature by means of the private key and upload it to the data publishing platform. After using homomorphic encryption algorithm to encrypt multi ⁃ sensitive attribute data， multi ⁃ dimensional sensitive attribute data is published based on record priority， and then the group administrators use batch verification method to verify the legality of the group signature. The experimental results show that the proposed method can resist link attack， attribute inference attack and unity attack， and the privacy leakage ratio is less than 5% . When the data is released 15 times， the maximum hidden record amount is only 12， and the identity of legal signatures can be tracked successfully to prevent illegal users from obtaining multiple sensitive attribute data， and the privacy protection effect is remarkable.

Keywords： group signature; homomorphic encryption; multi ⁃ sensitive attribute data; republication; privacy protection; priority; batch validation

0 引 言

在大数据、云计算等技术的推动下，数据的共享和重发布成为推动科学研究、促进经济发展、优化社会治理的重要手段[1⁃2]。（剩余5464字）