An Access Control Mode Based on Information Flow Graph

Due to different class systems make access decision independently, in the cross class information system (Cross-Class-IS), the privilege may be out of control and the security policies may not be coincident. It is huge risk especially to the higher class system. Now, the system normally checks the security of the access between subject and object. But it cannot protect the indirect information caused by access cross class and domain. This article proposes an access control model, which can be used to analyze the security in Cross-Class-IS.