Technology - Available in Java and Dot Net
Abstract—Using Cloud Storage,
users can remotely store their data and enjoy the on-demand high quality
applications and services from a shared pool of configurable computing
resources, without the burden of local data storage and maintenance. However,
the fact that users no longer have physical possession of the outsourced data
makes the data integrity protection in Cloud Computing a formidable task,
especially for users with constrained computing resources. Moreover, users
should be able to just use the cloud storage as if it is local, without
worrying about the need to verify its integrity. Thus, enabling public
auditability for cloud storage is of critical importance so that users can
resort to a third party auditor (TPA) to check the integrity of outsourced data
and be worry-free. To securely introduce an effective TPA, the auditing process
should bring in no new vulnerabilities towards user data privacy, and introduce
no additional online burden to user. In this paper, we propose a secure cloud
storage system supporting privacy-preserving public auditing. We further extend
our result to enable the TPA to perform audits for multiple users simultaneously
and efficiently. Extensive security and performance analysis show the proposed
schemes are provably secure and highly efficient.
Index Terms—Data storage,
privacy-preserving, public auditability, cryptographic protocols, cloud
computing.
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