A Dynamic Integrity Transitivity Model for the Cloud

Utilizing Trusted computing technology to enhance the security of Cloud has become a hot research, and a large number of solutions have been proposed in recent years. However, all of these solutions are focused on separating one Virtual Machine (VM) from others, and it is too strict for practical scenario as it forbids the communication between VMs. In this paper we propose a trust transitive model, named Dynamic Integrity Measurement Model (DIMM), for two VMs communication, and then an implementation of DIMM prototype is given. When dataflow occurs between two VMs, the DIMM will keep the trustworthiness of a system by ensuring the integrity of VMs and the delivered message. We also demonstrate the effectiveness of the model by experiments.