Privacy Preserving Multi Sharing Control for Big Data Storage

Abstract

Security is a prime concern for any service that provides big data storage. The
data of an individual should remain confidential and should be accessed only by any
authenticated person. One of the aspects of security that is considered prior storing data is
the anonymity of the service clients. The service that is used for storage should provide
practical and fine-grained encrypted data sharing in such a way that only a ciphertext of
data is shared among others by the data owner under some specified conditions. The
required features are obtained by introduction a new technique for providing big data
storage i.e., a privacy preserving ciphertext multi sharing mechanism. In this technique the
advantages of proxy re-encryption technique are employed that enables ciphertext to be
securely and conditionally shared multiple times and it also ensures that the knowledge of
underlying message and the identity information of ciphertext senders and recipients is
not leaked. The technique is also vulnerable to the chosen ciphertext attacks.