Exploiting Group Signature to Implement User Authentication in Cloud Computing

摘要

Cloud computing is a technology which is developed from the distributed computing. The cloud server provider gathers the redundant storage and computing resource to realize the goal of providing scalable computing resources to consumers. The infrastructures of the cloud computing are virtualized and they can be considered infinite. Therefore, the user side does not need to consider the local storage and computing resource. However, the cloud services are provided by the third party. As a general rule, the user who stores the data in the cloud is not safe. The security of the data is really concerned by the user. In other words, the cloud is interested in the data. We proposed a scheme that can support cloud user's identity authentication, which is based on the group signature. From the security analysis, our scheme can resist some possible attacks.