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PXI技术把自动测试设备PC化 被引量:2
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作者 Mike Trimborn 《电子产品世界》 2003年第12B期55-56,共2页
关键词 PXI技术 自动测试设备 计算机化 ATE 控制服务软件 生产测试
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A Protective Mechanism for the Access Control System in the Virtual Domain 被引量:1
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作者 Jinan Shen Deqing Zou +3 位作者 Hai Jin Kai Yang Bin Yuan Weiming Li 《China Communications》 SCIE CSCD 2016年第11期129-142,共14页
In traditional framework,mandatory access control(MAC) system and malicious software are run in kernel mode. Malicious software can stop MAC systems to be started and make it do invalid. This problem cannot be solved ... In traditional framework,mandatory access control(MAC) system and malicious software are run in kernel mode. Malicious software can stop MAC systems to be started and make it do invalid. This problem cannot be solved under the traditional framework if the operating system(OS) is comprised since malwares are running in ring 0 level. In this paper,we propose a novel way to use hypervisors to protect kernel integrity and the access control system in commodity operating systems. We separate the access control system into three parts: policy management(PM),security server(SS) and policy enforcement(PE). Policy management and the security server reside in the security domain to protect them against malware and the isolation feather of the hypervisor can protect them from attacks. We add an access vector cache(AVC) between SS and PE in the guest OS,in order to speed up communication between the guest OS and the security domain. The policy enforcement module is retained in the guest OS for performance. The security of AVC and PE can be ensured by using a memory protection mechanism. The goal of protecting the OS kernel is to ensure the security of the execution path. We implementthe system by a modified Xen hypervisor. The result shows that we can secure the security of the access control system in the guest OS with no overhead compared with modules in the latter. Our system offers a centralized security policy for virtual domains in virtual machine environments.Keywords: hypervisor; virtualization; memo- 展开更多
关键词 HYPERVISOR VIRTUALIZATION memory protection guest OS access control system
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