基于区块链的动态多用户可搜索加密方案  

Blockchain-based dynamic multi-user searchable encryption scheme

作　　者：刘欢 邓伦治[1,2] 李滨瀚 Liu Huan;Deng Lunzhi;Li Binhan(School of Mathematical Sciences,Guizhou Normal University,Guiyang 550025,China;Key Laboratory of Information&Computing Science Guizhou Province,Guizhou Normal University,Guiyang 550025,China)

机构地区：[1]贵州师范大学数学科学学院,贵阳550025 [2]贵州师范大学贵州省信息与计算科学重点实验室,贵阳550025

出　　处：《计算机应用研究》2025年第3期693-699,共7页Application Research of Computers

基　　金：国家自然科学基金资助项目(62462014);贵阳市科技计划资助项目(筑科合同[2021]43-8);贵州省高层次创新人才资助项目(黔科合平台人才GCC[2022]018-1);贵州省教育厅自然科学研究资助项目(黔教技[2023]010);贵州省科技计划资助项目(黔科合基础-ZK[2024]重点058)。

摘　　要：单用户可搜索加密方案无法满足多用户环境下的数据分享需求,且存在密钥泄露风险。为此,利用(t,N)秘密共享结构和区块链技术构造了一个基于身份的多用户可搜索加密方案。该方案解决了多用户环境下的数据分享和机密性问题,实现了用户的动态更新功能,防止了密钥泄露,并在标准模型下被证明能够抵御关键字猜测攻击。与五个现存的相关方案相比较,该方案在计算成本上表现出效率优势,适用于云储存环境下的数据分享。Single-user searchable encryption scheme cannot meet the data sharing requirements in a multi-user environment and poses the risk of key leakage.Accordingly,this paper constructed an identity-based multi-user searchable encryption scheme by leveraging the(t,N)secret sharing structure and blockchain technology.The scheme resolved the issues of data sharing and confidentiality in a multi-user environment,realized dynamic user updates,prevents key leakage,and was proven to be resistant to keyword guessing attacks under the standard model.Compared with five existing related schemes,the scheme demonstrates efficiency advantages in terms of computational costs.It is suitable for data sharing in cloud storage environments.

关 键 词：区块链 可搜索加密 基于身份加密 多用户 用户的动态更新 标准模型 

分 类 号：TP309[自动化与计算机技术—计算机系统结构]