Attribute-Based Access Control Meets Blockchain-Enabled Searchable Encryption: A Flexible and Privacy-Preserving Framework for Multi-User Search

【Author】 Han, Jiujiang; Li, Ziyuan; Liu, Jian; Wang, Huimei; Xian, Ming; Zhang, Yuxiang; Chen, Yu

【Source】ELECTRONICS

【影响因子】2.690

【Abstract】Searchable encryption enables users to enjoy search services while protecting the security and privacy of their outsourced data. Blockchain-enabled searchable encryption delivers the computing processes that are executed on the server to the decentralized and transparent blockchain system, which eliminates the potential threat of malicious servers invading data. Recently, although some of the blockchain-enabled searchable encryption schemes realized that users can search freely and verify search results, unfortunately, these schemes were inefficient and costly. Motivated by this, we proposed an improved scheme that supports fine-grained access control and flexible searchable encryption. In our framework, the data owner uploads ciphertext documents and symmetric keys to cloud database and optional KMS, respectively, and manipulates the access control process and searchable encryption process through smart contracts. Finally, the experimental comparison conducted on a private Ethereum network proved the superiority of our scheme.

【Keywords】smart contract; blockchain; searchable encryption; attribute-based access control smart contract; blockchain; searchable encryption; attribute-based access control

【发表时间】2022 AUG

【收录时间】2022-09-06

【文献类型】理论模型

【主题类别】

区块链技术-核心技术-加密算法