title: An Efficient Searchable Encryption Against Keyword Guessing Attacks for Sharable Electronic Medical Records in Cloud-based System.
abstract: Preserving the privacy of electronic medical records (EMRs) is extremely important especially when medical systems adopt cloud services to store patients' electronic medical records. Considering both the privacy and the utilization of EMRs, some medical systems apply searchable encryption to encrypt EMRs and enable authorized users to search over these encrypted records. Since individuals would like to share their EMRs with multiple persons, how to design an efficient searchable encryption for sharable EMRs is still a very challenge work. In this paper, we propose a cost-efficient secure channel free searchable encryption (SCF-PEKS) scheme for sharable EMRs. Comparing with existing SCF-PEKS solutions, our scheme reduces the storage overhead and achieves better computation performance. Moreover, our scheme can guard against keyword guessing attack, which is neglected by most of the existing schemes. Finally, we implement both our scheme and a latest medical-based scheme to evaluate the performance. The evaluation results show that our scheme performs much better performance than the latest one for sharable EMRs.
authors.affiliation: College of Computer, National University of Defense Technology, Changsha, Hunan, People's Republic of China. yl.wu@nudt.edu.cn.
authors.forename: Yilun
authors.identifier: http://orcid.org/0000-0003-1434-2039
authors.initials: Y
authors.lastname: Wu
authors.affiliation: National Key Laboratory for Parallel and Distributed Processing, National University of Defense Technology, Changsha, Hunan, People's Republic of China.
authors.forename: Xicheng
authors.initials: X
authors.lastname: Lu
authors.affiliation: National Key Laboratory for Parallel and Distributed Processing, National University of Defense Technology, Changsha, Hunan, People's Republic of China.
authors.forename: Jinshu
authors.initials: J
authors.lastname: Su
authors.affiliation: College of Computer, National University of Defense Technology, Changsha, Hunan, People's Republic of China.
authors.forename: Peixin
authors.initials: P
authors.lastname: Chen
mesh_terms: D000465:Algorithms; D000067917:Cloud Computing; D016494:Computer Security / Q000295:instrumentation*; D003219:Confidentiality; D003365:Costs and Cost Analysis; D057286:Electronic Health Records / Q000458:organization & administration*; D066275:Health Information Exchange
keywords: Cloud storage; Electronic medical record; Privacy; Searchable encryption; Secure channels; Security