Confidentiality-Conserving Community Auditing For Protected Haze Storing

Abstract

Using Haze Storing, 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 Storing and maintenance. However, the fact that users no longer have physical possession of the outsourced data makes the data integrity protection in Haze Computing a formidable task, especially for users with constrained computing resources. Moreover, users should be able to just use the Haze Storing as if it is local, without worrying about the need to verify its integrity. Thus, enabling Community auditability for Haze Storing 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 Protectedly introduce an effective TPA, the auditing process should bring in no new vulnerabilities towards user data Confidentiality, and introduce no additional online burden to user. In this paper, we propose a Protected Haze Storing system supporting Confidentiality-Conserving Community 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 Protected and highly efficient