A Blockchain-Enabled Lightweight Boolean Multi-Keyword Search Scheme for Encrypted EHRs in Medical Cloud EnvironmentsOA
To tackle the growing need for efficient and fine-grained ciphertext access control and search capabilities in managing large-scale electronic health records(EHRs)within medical cloud environments,we propose a novel blockchain-enabled lightweight boolean multi-keyword search scheme.This cutting-edge solution integrates attribute-based access control with boolean multi-keyword search by embedding access structure within the index and incorporating search structures within the trapdoor.By harnessing the power of blockchain technology,our approach facilitates outsourced encryption,decryption,and search operations for EHRs,effectively eliminating the necessity for additional result verification.Through comprehensive security analysis and performance evaluation,we demonstrate that our proposed scheme not only exhibits robust security features but also significantly reduces computational,storage,and communication overhead when compared to the state of the arts.Notably,the computational overhead of index generation is reduced by at least 36.4%,underscoring the efficiency of our approach.Furthermore,our scheme achieves exceptional efficiency in smart contract execution,rendering it particularly suitable for resource-constrained devices in medical cloud environments.
Heng He;Yuejia Chen;Jianfeng Lu;Lei Nie;Abegaz Mohammed Seid
School of Computer Science and Technology,Wuhan University of Science and Technology,Wuhan 430065,China Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial System,WuhanUniversity of Science and Technology,Wuhan 430065,ChinaSchool of Computer Science and Technology,Wuhan University of Science and Technology,Wuhan 430065,China Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial System,WuhanUniversity of Science and Technology,Wuhan 430065,ChinaSchool of Computer Science and Technology,Wuhan University of Science and Technology,Wuhan 430065,China Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial System,WuhanUniversity of Science and Technology,Wuhan 430065,ChinaSchool of Computer Science and Technology,Wuhan University of Science and Technology,Wuhan 430065,China Hubei Province Key Laboratory of Intelligent Information Processing and Real-time Industrial System,WuhanUniversity of Science and Technology,Wuhan 430065,ChinaCollege of Science and Engineering,Hamad Bin Khalifa University,Doha 34110,Qatar
信息技术与安全科学
medical cloud environmentsciphertext searchciphertext access controlblockchainboolean multikeyword
《Tsinghua Science and Technology》 2026 (3)
P.1750-1763,14
supported in part by the National Natural Science Foundation of China(Nos.62372343 and 62072411)the Zhejiang Provincial Natural Science Foundation of China(No.LR21F020001)the Key Research and Development Program of Hubei Province(No.2023BEB024).
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