Data retrieval with secure CP-ABE in splittened storage

摘要

Cloud Storage, where users can remotely store their data and enjoy the on-demand high quality applications and services from a shared pool of configurable computing resources, instead local data storage burden and maintenance. Nodes in network communicate with each other accessing their confidential information using external storage nodes. Increased protection for confidential data provided by Ciphertext-policy attribute-based encryption (CP-ABE) methods which are managing their attributes by multiple key authorities where data is stored centrally on server. 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. Thus, enabling public auditability for cloud storage so that users can resort to a third party auditor (TPA) to check the integrity of outsourced data. In this paper, we propose secure split data storage in cloud network using public auditing. We further extend our result to provide more trusted environment in this type of storage, we are introducing the concept of multiple storage node for storing single data file. Security and performance analysis shows the proposed schemes are provably secure and highly efficient.