A Robust and Auditable Data Access Control using CP-ABE for Multiple Attribute Authorities Cloud Storage System

Abstract

Data access control is a challenging issue in public cloud storage systems. Ciphertext-Policy Attribute-Based Encryption (CP-ABE) has been maintain as a assuring technique to provide flexible, fine-grained and secure data access control for cloud storage with honest-but-interested cloud servers. However, in the existing CP-ABE schemes, the single attribute authority must execute the time-consuming user authority verification and secret key sharing, and hence it results in single-point performance congestion when a CP-ABE scheme is maintain in large-scale cloud storage system. Users may be fastening in the waiting queue for a long period to obtain their secret keys, thereby resulting in low-efficiency of the system. Although multi-authority access control schemes have been proposed, these schemes still cannot overcome the drawbacks of single-point congestion and low efficiency, due to the fact that each of the authorities still indivally manages a disjoint attribute set.In this project, I proposed a novel heterogeneous framework to remove the problem of single-point performance congestion and provide a more efficient access control scheme with an auditing mechanism.