Research On Dynamic Integrity Measurement Model Of Xen Virtual Machine Based On VTPM

With the development of cloud computing,virtualization technology has been widely used.Virtual machines provide service for users,at the same time it becomes attackers ' object.How to ensure the integrity of the running program in virtual machine becomes an urgent problem.The existing integrity measurement mechanism introduces the trusted computing technology.As the root of trusted,Trusted Platform Module(TPM)establishes a trusted chain to measure the integrity of process,this single static chain can not ensure the platform dynamic credible after running,and it can not meet the safety and performance requirements in virtual environment.In this paper,the problem of virtual platform is based on a typical virtual machine monitor Xen,which implements a dynamic integrity metric model based on virtual trusted platform module(vTPM).The model combines virtual machine introspection and event interception technology to ensure the security of the entire user domain.Based on the framework of the proposed model,this paper put forwards a Self-modify dynamic measurement strategy,through this strategy can effectively reduce the measurement frequency,and improve the measurement performance.Finally,the validity and feasibility of the proposed model are proved by comparison experiment.