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《Computer Science》 2007-10
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On the Principle of Information Transfer in Covert Channel

LIU Zhi-Feng JU Shi-Guang WANG Chang-Da ZHOU Cong-Hua (School of Computer Science and Telecommunication Engineering,Jiangsu University,Jiangsu Zhenjiang 212013)  
Some covert information flow evades the inspection of security mechanism in trusted computer system,which results in information leakage.The atomic channel model was established by analyzing and abstracting the principle of covert information flow.A finite state machine was used to describe an atomic channel model Based on the structured operational semantics proposed by Plotkin we can compute sequences of states.By reasoning on state sequences against the definition of covert channel,restriction conditions of secure state translation were gained,and the principle of infor- mation leakage in two atomic channel models sharing an object was found.Consequently a covert channel identification method based on operational semantics was proposed.The experiment on elevator dispatch algorithm showed that our method could search for covert channels efficiently.
【Fund】: 本课题受到国家自然科学基金(编号:60573046)的资助。
【CateGory Index】: TP309
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【Co-citations】
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1 YU Fan hua,FU Miao miao,WANG Sheng feng (The Institute of Information & Technology Changchun Teachers College,Changchun 130032,China);How to Reallize Fast and Dynamic Bind in Use of Method Name in Orient Language[J];Journal of Changchun Teachers College;2002-05
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