A New Primitive Secure Identity-Based Authentication Framework for Data Storage In Cloud

Abstract

The fact that users no longer have physical possession of the possibly large size of outsourced data makes the data integrity protection in Cloud Computing a very challenging and potentially formidable task, especially for users with constrained computing resources and capabilities. Thus, enabling public auditability for cloud data storage security is of critical importance so that users can resort to an external audit party to check the integrity of outsourced data when needed. Up to the date, a number of Remote data integrity checking (RDIC) protocols have been proposed but most of the constructions suffer from the issue of a complex key management, they depend on the expensive public key infrastructure (PKI), which might delay the deployment of RDIC in performance. In this paper, a new approach of identity-based (ID-based) RDIC protocol is proposed by using key-homomorphic cryptographic primitive to reduce the system complexity and the cost for establishing and managing the public key authentication framework. The proposed ID-based RDIC protocol doesn't leaks any information of the stored data to the verifier during the RDIC process. The new method is demonstrated with secure against the malicious server in the generic group model and achieves zero knowledge privacy against a verifier.