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Tsinghua Science and Technology  2017, Vol. 22 Issue (5): 469-478    doi: 10.23919/TST.2017.8030536
Special Section on Information Security     
Trusted Attestation Architecture on an Infrastructure-as-a-Service
Xin Jin,Xingshu Chen*,Cheng Zhao,Dandan Zhao
Xin Jin, Xingshu Chen, Cheng Zhao, and Dandan Zhao are with the College of Computer Science, Sichuan University, Chengdu 610065, China. E-mail: xinjin_cn@163. com;;
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Trusted attestation is the main obstruction preventing large-scale promotion of cloud computing. How to extend a trusted relationship from a single physical node to an Infrastructure-as-a-Service (IaaS) platform is a problem that must be solved. The IaaS platform provides the Virtual Machine (VM), and the Trusted VM, equipped with a virtual Trusted Platform Module (vTPM), is the foundation of the trusted IaaS platform. We propose a multi-dimensional trusted attestation architecture that can collect and verify trusted attestation information from the computing nodes, and manage the information centrally on a cloud management platform. The architecture verifies the IaaS’s trusted attestation by apprising the VM, Hypervisor, and host Operating System’s (OS) trusted status. The theory and the technology roadmap were introduced, and the key technologies were analyzed. The key technologies include dynamic measurement of the Hypervisor at the process level, the protection of vTPM instances, the reinforcement of Hypervisor security, and the verification of the IaaS trusted attestation. A prototype was deployed to verify the feasibility of the system. The advantages of the prototype system were compared with the Open CIT (Intel Cloud attestation solution). A performance analysis experiment was performed on computing nodes and the results show that the performance loss is within an acceptable range.

Key wordsdynamic measurement      trusted cloud      vTPM      trusted attestation     
Received: 01 October 2016      Published: 26 September 2017
Corresponding Authors: Xingshu Chen   
Cite this article:

Xin Jin,Xingshu Chen,Cheng Zhao,Dandan Zhao. Trusted Attestation Architecture on an Infrastructure-as-a-Service. Tsinghua Science and Technology, 2017, 22(5): 469-478.

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Fig. 1 Trusted attestation architecture on IaaS.
Fig. 2 Hypervisor dynamic measurement mechanism.
Fig. 3 KVM dynamic measurement mechanism.
Fig. 4 Code segment data extraction and comparing.
Fig. 5 QEMU dynamic measurement mechanism.
Fig. 6 vTPM measurement list.
Fig. 7 vTPM measurement list initialization process.
Fig. 8 vTPM lifecycle.
Fig. 9 Verifying the trusted attestation of the IaaS.
Fig. 10 Prototype system organization.
Prototype systemOpen CIT
Open sourceYesYes
KVM integrityYesYes
VM integrityYesNo
QEMU integrityYesNo
HardwareDo not bind to Intel corporationBind to Intel corporation
Software clusterTrustedGRUB, IMA, OpenPTS, OpenstackTboot, Intel txt, Open CIT, Openstack
Table 1 Comparison of prototype system and Open CIT software.
Fig. 11 Memory load latency when deploying the prototype system in computing node.
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