Computer and Modernization

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CPABE Scheme with Efficient Attribute Revocation

  

  1. School of Computer and Information, Hohai University, Nanjing 211100, China
  • Received:2015-07-28 Online:2015-12-23 Published:2015-12-30

Abstract: As a new cryptographic primitive, attributebased encryption (ABE) scheme uses several attributes to identify a user and achieves finegrained access control. However, the complex issue of user revocation has become a bottlenect in ABE schemes. To solve the problem, the paper proposed a ciphertextpolicy attribute based encryption (CPABE) scheme with efficient user revocation. In this scheme, lists with content length are maintained to record the revoked users. Attribute revocation was excuted by the trusted authority without updating the keys of the system and the associated users, which reveals computation overhead in revocation.:

Key words: ABE, access control, revocation, collusion attack, revocation lists

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