网络与信息安全学报2025，Vol.11Issue(5)：115-125,11.DOI:10.11959/j.issn.2096-109x.2025054
基于PIR增强的可搜索加密方案研究
Research on searchable encryption scheme based on enhanced PIR
摘要
Abstract
Data was encrypted with searchable encryption technology before being uploaded to the cloud,which could,to a certain extent,balance data security and usability.However,systems based on this technology were found to carry the risk of exposing user privacy at the access or search pattern level.To address this issue,an en-hanced searchable encryption scheme for privacy information retrieval was proposed.In the preprocessing stage of the scheme,the database was first partitioned and preprocessed.The trapdoor and keyword ciphertext were calcu-lated simultaneously,and partition-related information was stored.This design was shown to not only reduce the computational and communication costs of the system but also improve subsequent query efficiency.In the actual query process,after the query request from the client was received by the server,the trapdoor was verified to achieve precise access control.Then,operations were performed on the data that had undergone homomorphic en-cryption.From the overall execution logic,the specific content of the user's query could not be inferred by attack-ers through the system interaction process,thus effectively solving the problem of access pattern leakage.Simulta-neously,the association relationship between the trapdoor,keyword ciphertext,and the query content could not be established by the server,effectively avoiding search pattern leakage.Experimental results show that as the data volume continues to increase,the computational cost advantage of this scheme becomes increasingly prominent.Compared with traditional privacy information retrieval protocols,the query time is reduced by approximately 80%in the proposed scheme.关键词
可搜索加密/隐私信息检索/同态加密/隐私保护Key words
searchable encryption/privacy information retrieval/homomorphic encryption/privacy protection分类
信息技术与安全科学引用本文复制引用
唐亮,马利民..基于PIR增强的可搜索加密方案研究[J].网络与信息安全学报,2025,11(5):115-125,11.基金项目
国家重点研发计划(2022YFC3320903) （2022YFC3320903）
未来区块链与隐私计算高精尖创新中心(GJJ-24-016) The National Key R&D Program of China(2022YFC3320903),Beijing Advanced Innovation Center for Future Blockchain and Privacy Computing(GJJ-24-016) （GJJ-24-016）
