A Secure Anti – Collusion Data Sharing Scheme For Dynamic Groups In The Cloud

Abstract

Cloud Computing, users can achieve an growing and balanced methodology for data sharing among the group members and individuals in the cloud with the characters of tiny management and tiny maintenance cost. It provides a security certification for data sharing because outsourced data’s are at risk .Due to frequently changing the memberships in the group provide privacy preserving issue ,mainly for an untrusted cloud due to collusion attack or pilot attack. In existing system key distribution is based on secure communication channels[1]. In that key is known to everyone and implementation is very difficult to practice. In this paper, we propose a key distribution without any communication channel and the user can know their private key from their group manager in secured manner. AES Algorithm is used for data encryption and decryption techniques and ring signature is used for key distribution between the group members.