Computer Science

Computer Science ›› 2018, Vol. 45 ›› Issue (7): 162-166.doi: 10.11896／j.issn.1002-137X.2018.07.028

• Information Security • Previous Articles     Next Articles

Attribute-based Proxy Re-encryption Technology and Fault-tolerant Mechanism Based Data Retrieval Scheme

LIU Xin-yu1,LI Lang1,XIAO Bing-bing2   

  1. College of Computer Science and Technology,Hengyang Normal University,Hengyang,Hunan 421002,China1;
    College of Information Science and Technology,Jinan University,Guangzhou 510632,China2
  • Received:2017-02-08 Online:2018-07-30 Published:2018-07-30

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Abstract: Aiming at the privacy of user information stored in the cloud server problem,a scheme based on property broker re-encryption and fault-tolerant mechanism was proposed.This scheme mainly divides the data stored by users into files and the security index of files,encrypts them separately and then stores them on different cloud servers.Firstly,the security index of file is constructed by using the inverted structure and the keywords are preprocessed by using the fuzzy extractor,so the users can search multi-keywords with fault tolerance through the security index.Secondly,the access control tree is used for re-encryption ofdecryption key to realize right management,namely,the effective sharing of data in cloud.Finally,the scheme is proved to be secure in cloud environment through Complex Triple Diffie-Hellman problem,proving that the system master key generated by this scheme is secure.Compared with the existing schemes,it is shown that the scheme can reduce the computational complexity of key re-encryption and decryption,and the fault-tolerant mechanism improves the efficiency of data retrieval.

Key words: Access control tree, Fault-tolerant mechanism, Fuzzy extractors, Multiple keywords, Re-encryption technology

CLC Number: 

  • TP309
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