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.
Goals
Our general goal is to develop an efficient group key management protocol for file sharing on cloud storage, the resulting techniques should be able to confront two main problems. One is ensuring that the content of the shared files cannot be learned by the unauthorized peoples. The other is protecting the files against misoperation by the cloud provider and interception by the network.
Motivation
The motivation of the protocol is distribute group key without the cloud provider's participation. A key share protocol is proposed for the file owner to distribute the group keys. To detect whether there are adversaries among the key share protocol, a verification protocol is proposed as well.
Architecture
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