Research on Multilevel Security Model Based on Trustworthy State and Its Application
Shen Chang-xiang · Dianzi xuebao · 2007
This paper proposes a multilevel security model based on trustworthy state,which introduces the concept of reliability and the function of integrity measurement.It enforces diverse security rules to different kinds of objects.To prevent running intrusions,the access ranges of subjects are adjusted according to their reliabilities.The formal description of the model and the transform of its trustworthy states are given in the paper.It is proved that the system remains in a secure state after performing the security rules of the new model.Moreover,its realizing framework in operating system kernel is described,and its performance is analyzed.