Forward Security & Cipher text policy on Data Privacy preservation by shared authority encryption

Abstract

Cloud computing is emerging as a prevalent data interactive paradigm to realize user’s data remotely stored in an online cloud server.. A cloud storage system, consisting of an accumulation of storage servers, provides long-term storage accommodations over the Internet. Storing data in a third party’s cloud system causes solemn concern over data confidentiality. Constructing a secure storage system that fortifies multiple functions is challenging when the storage system is distributed and has no central ascendancy. We propose a proxy re-encryption scheme that fortifies encoding operations over encrypted messages as well as forwarding operations over encoded and encrypted messages. Our method plenarily integrates encrypting, encoding, and forwarding. We analyze and suggest congruous parameters for the number of replicas of a message dispatched to storage servers and the number of storage servers queried by a key server.