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PUBLIC INTEGRITY AUDITING FOR SHARED DYNAMIC
CLOUD DATA WITH GROUP USER REVOCATION
ABSTRACT
The advent of the cloud computing makes storage outsourcing become a rising trend,
which promotes the secure remote data auditing a hot topic that appeared in the research
literature. Recently some research consider the problemof secure and efficient public data
integrity auditing for shared dynamic data. However,these schemes are still not secure against
the collusion of cloud storage server and revoked group users during user revocation in practical
cloud storage system. In this paper, we figure out the collusion attack in the exiting scheme and
provide an efficient public integrity auditing scheme with secure group user revocation based on
vector commitment and verifier-local revocation group signature. We design a concrete scheme
based on the our scheme definition. Our scheme supports the public checking and efficient user
revocation and also some nice properties, such as confidently, efficiency, countability and
traceability of secure group user revocation. Finally, the security and experimental analysis show
that, compared with its relevant schemes our scheme is also secure and efficient.

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