Public Integrity Auditing for Shared Dynamic Cloud Data with Group User Revocation

Abstract

The advent of the cloud computing makes storage outsourcing becomes a rising trend, which promotes
the secure remote data auditing a hot topic that appeared in the research literature. Recently some researches
consider the problem of 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 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