Computer Science ›› 2016, Vol. 43 ›› Issue (1): 191-194.doi: 10.11896/j.issn.1002-137X.2016.01.043

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CP-ABE Scheme with Supporting Policy Elastic Updating in Cloud Storage Environment

XIONG An-ping, XU Chun-xiang and FENG Hao   

  • Online:2018-12-01 Published:2018-12-01

Abstract: In recent years,CP-ABE has been researched extensively as an access control mechanism in cloud storage environment.Because existing access control schemes based on CP-ABE can not support the elastic update with the system properties in cloud storage environment,this paper used the cloud storage service provider’s(CSP’s) storage and computing resources advantages,and proposed a cloud storage access control scheme which supports the system attribu-tes revocation or recovery based on the attribute-based access control with efficient revocation(AB-ACER) scheme.The scheme introduces virtual attributes for the access control tree,and when system attributes have been revoked or recovered,CSP only provides small re-encryption computation.Security analysis and performance analysis show that the proposed scheme not only supports a changeable access control policy for data owner(DO),but also ensures the confidentiality of data and the fine-grained access control,and reduces a large number of encryption calculation works for DO.

Key words: Cloud storage,CP-ABE,System attribute update,Virtual attribute,Access control

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