Computer and Modernization ›› 2018, Vol. 0 ›› Issue (07): 114-.doi: 10.3969/j.issn.1006-2475.2018.07.023

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Attribute-basedEncryptionSchemewithEfficientRevocation

  

  1. (DepartmentofInformation,BeijingUniversityofTechnology,Beijing100124,China)
  • Received:2017-12-19 Online:2018-08-23 Published:2018-08-27

Abstract: Attribute-BasedEncryption(ABE)associatesthekeyandtheciphertextwithaseriesofattributes,canrealizeaccesscontrolflexibly,andiswidelyusedincloudcomputingenvironment.Sincemostoftheexistingattributerevocationschemesdonotmakegooduseofthecomputingpowerofthecloudserver,thispaperproposesanefficientandfine-grainedaccesscontrolscheme.TheaccesscontrolstructureadoptedinthisschemecanexpressanyaccessstrategyinvolvingBooleanoperators.BycombiningABEwithattributeusergrouprandomkeydistributiontoimplementdoubleencryption,ittransfersallundooperationstoattribute-levelfine-grainedrevocation.What’smore,becausethedataalwaysexistontheserverinciphertextsoastoreducethesecurityrestrictionontheserver,itcantransfermostofthesecondciphertextencryptiontaskstothecloudserver,whichreducesthecomputationalcostofthedataownerandgreatlyenhancestheefficiencyofcomputingsystems.

Key words: ABE, cloudcomputing, accesscontrol, revoked, re-encryptions

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