灵活访问且模糊可搜索的EHR云服务系统

doi:10.11896／j.issn.1002-137X.2018.10.032

Abstract

Abstract: In e-healthcare record systems (EHRS),some schemes exploit key-policy ABE (KP-ABE)to protect privacy.An access policy is specified by the user,and the ciphertexts can be decrypted only when they match users’ access plicy.The existing KP-ABE requires that the access policies should be confirmed first during key generation,which is not always practicable in EHRS,because the policies are sometimes confirmed after key generation.Based on KP-ABE,this paper proposed a flexibly accessed and vaguely searchable EHR cloud service system.This system not only fulfills the cloud ciphertext search based on keyword fault-tolerant technique,but also allows users to redefine their access policies and generates keys for the redefined ones,hence,a precise policy is no longer necessary.Finally,the scheme was proved to be secure.

Key words: Access control, Attribute-based encryption, E-healthcare record, Keyword fault tolerant, Vaguely searchable

CLC Number:

TP309

YAN Ming, ZHANG Ying-hui, ZHENG Dong, LV Liu-di, SU Hao-nan. Flexibly Accessed and Vaguely Searchable EHR Cloud Service System[J].Computer Science, 2018, 45(10): 172-177.

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Flexibly Accessed and Vaguely Searchable EHR Cloud Service System

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