Abstract

A cloud storage system is a collection of storage servers capable of storing huge volumes of data. Security is the main issue in this system of storing a data in third party cloud storage area. To overcome this issue by untrusted third-party data being stored should be secured while storing data in the storage server. This paper explains the way of storing data which increases the availability of data and thus robustness of the system. It also describes the additional functionalities performed by servers like encoding of data and proxy re-encryption when data forwarding required which minimizes interaction of user on processing data. This method integrates an encryption, encoding and proxy re-encryption scheme which achieves data confidentiality and integrity. The availability of data is promised till the single storage server is available and thus robustness of the system will be increased. The implementation will be done using the Google app - engine.