Study and Implementation of Trust Evaluation Access Control Mechanism Based on XEN

With the use of virtualization, threats appears gradually in domains constituted by host and virtual machines (VMs). Access control between VMs becomes a necessary method of the security management of virtualized platform. The traditional Mandatory Access Control (MAC) based on fixed security policy is greatly restricted on flexibility. In this paper, we proposed a quantitatively trust evaluation method based on VM's historical behavior, which combined with existing MAC mechanism, to build a flexible, fine-grained access control mechanism.