A Survey of Detecting Methods of Information Flow to Find Convert Channel

After defining the idea of Convert channel, this paper analyses detecting methods of convert channel including syntactic information flow analysis and semantic information flow approach. This paper put forwards one method of improved syntactic information flow processing whose core idea is to design PC to sign every row of program in this kind of method, and detect the covert information flow by this kind of data structure - stack. The validity of this method is proved using an example in this paper.