Computer Science ›› 2018, Vol. 45 ›› Issue (10): 172-177.doi: 10.11896/j.issn.1002-137X.2018.10.032

• Information Security • Previous Articles     Next Articles

Flexibly Accessed and Vaguely Searchable EHR Cloud Service System

YAN Ming1, ZHANG Ying-hui1,2,3, ZHENG Dong1,2, LV Liu-di1, SU Hao-nan1   

  1. National Engineering Laboratory for Wireless Security,Xi’an University of Posts and Telecommunications,Xi’an 710121,China 1
    Westone Cryptologic Research Center,Beijing 100070,China 2 State Key Laboratory of Cryptology,Beijing 100878,China 3
  • Received:2017-09-11 Online:2018-11-05 Published:2018-11-05

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

CLC Number: 

  • TP309
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