Abstract
The large-scale sharing needs of many enterprises promote the development of cloud storage. While the cloud computing stores the shared files outside the trust domain of the owner, the demands and concerns for file security is arising. In this paper, a Group Key Management Protocol for file sharing on cloud storage (GKMP) is proposed. Faced with network attacks from public channel, a group key generation scheme based on mixed encryption technology is proposed. And a verification scheme is used to prevent shared files from being attacked by the collusion attack of cloud providers' and group members'. Security and performance analyses indicate that the proposed protocol is both secure and efficient for data sharing in cloud computing.
Highlights
Faced with today’s innovative blow-up of cloud technologies, rebuilding services in terms of cloud have become more popular
We proposed a secure group key management protocol on cloud storage over unreliable channels, aiming at protecting the shared files on the cloud storage
Zhang et al.: Group Key Management Protocol for File Sharing on Cloud Storage as well as notations to be used in this paper
Summary
Faced with today’s innovative blow-up of cloud technologies, rebuilding services in terms of cloud have become more popular. In a shared-tenancy cloud computing environment, data from different clients which can be hosted on separate virtual machines may reside on a single physical machine [1] Under this paradigm, the data storage and management is under full control of the cloud provider, so data owners are left vulnerable and have to solely rely on the cloud provider to protect their data. The remaining challenge is how to share and manage the cryptographic keys among valid users without the participant of the cloud provider. We proposed a secure group key management protocol on cloud storage over unreliable channels, aiming at protecting the shared files on the cloud storage. S. Zhang et al.: Group Key Management Protocol for File Sharing on Cloud Storage as well as notations to be used in this paper.
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