A cloud user behavior authentication model based on multi-partite graphs

The trustiness of cloud platform is the key issues relating to its success or failure, and the authentication of the trustiness of user behavior is an important part of ensuring the credibility of cloud platform. In order to solve the problem of trustiness of cloud users´ behaviors, a cloud user behavior authentication model based on multi-partite graphs is proposed, including the layer of user behavior evidence, the layer of building behavior multi-partite graphs and the layer of behavior authentication; Identity re-certification and Risk Game are introduced to enhance security and accuracy of the model. Simulation experiments show that, the model is accurate and effective in measuring the normal behavior of cloud users and in distinguishing malicious user with the risk user, and has a higher detection ratio and a lower false positive ratio.