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Aegis: A Minimal TCB Code Execution Infrastructure on Legacy Systems
Liu Chen ,Sun Jianhua * #,Chen Hao ,Li Haiwei
Department of Computer Science and Technology, Hunan University
*Correspondence author
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Funding: 973项目,国家自然科学基金（No.2007CB310900,60803130）
Opened online:27 April 2010
Accepted by: none
Citation: Liu Chen ,Sun Jianhua ,Chen Hao .Aegis: A Minimal TCB Code Execution Infrastructure on Legacy Systems[OL]. [27 April 2010] http://en.paper.edu.cn/en_releasepaper/content/42400
 
 
In this paper, we propose a chipset based infrastructure on legacy systems, called Aegis, in which security-sensitive code can safely execute in spite of the compromised OS or DMA devices. Using system management mode which provide complete isolation, we reduce the size of TCB only inc luding security-sensitive code and another few hundreds of lines of additional code. We implement Aegis on an Intel Pentium IV processor and demonstrate how to use it to construct Aegis-enabled code with some examples. Finally, we evaluate the performance of our scheme and provide the results of experimental analysis.
Keywords:Trusted computing;system management mode;TCB;SMM;security
 
 
 

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