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题名:
identification and evaluation of sharing memory covert timing channel in xen virtual machines
作者: Wu Jing Zheng ; Ding Liping ; Wang Yongji ; Han Wei
会议文集: Proceedings - 2011 IEEE 4th International Conference on Cloud Computing, CLOUD 2011
会议名称: 2011 IEEE 4th International Conference on Cloud Computing, CLOUD 2011
会议日期: 4-Jul-20
出版日期: 2011
会议地点: Washington, DC, United states
关键词: Virtual reality
出版地: United States
收录类别: EI
ISBN: 9780769544601
部门归属: (1) National Engineering Research Center for Fundamental Software, Institute of Software, Beijing, China; (2) State Key Laboratory of Computer Science, Institute of Software, Beijing, China; (3) Graduate School Chinese Academy of Science, Beijing, China
主办者: IEEE; IEEE CS; TC-SVC; IBM; SAP
英文摘要: Virtualization technology is the basis of cloud computing, and the most important property of virtualization is isolation. Isolation guarantees security between virtual machines. However, covert channel breaks the isolation and leaks sensitive message covertly. In this paper, we formally model the isolation into noninterference, and define that all the transmission channels violating noninterference are covert channels. With this definition, we present an identification method based on information flow. This method first compiles the source code into a more structured equivalent code with LLVM. And then a search algorithm is proposed to obtain the shared resources and the operational processes in the equivalent code. A new covert channel termed sharing memory covert timing channel (SMCTC) is identified from Xen source code. We construct channel scenario for SMCTC, and evaluate its threat with the metrics of channel capacity and transmission accuracy. The results show that SMCTC is much more threatened than CPU load based and cache based covert channels etc. © 2011 IEEE.
内容类型: 会议论文
URI标识: http://ir.iscas.ac.cn/handle/311060/14281
Appears in Collections:互联网软件技术实验室 _会议论文

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Recommended Citation:
Wu Jing Zheng,Ding Liping,Wang Yongji,et al. identification and evaluation of sharing memory covert timing channel in xen virtual machines[C]. 见:2011 IEEE 4th International Conference on Cloud Computing, CLOUD 2011. Washington, DC, United states. 4-Jul-20.
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