Dynamic Method for Covert Channels Elimination
Xiangmei Song · Journal of Chinese Computer Systems · 2009
Only is lodging software running,covert channels are active and threat is tangible. Execution of application software depends on operating system. In multilevel secure operating system,security levels assign to subjects are implemented by give security levels to users and processes which represent users. A new algorithm for covert channels elimination named LTHC is presented to mandate sensitive information flows from low security level to higher only,which sort processes according to their security levels into an execution queue by add security level restrictions on process priority scheduling algorithm. LTHC can eliminate both storage channels and timing channels,moreover,it has mechanism to schedule processes fairly and avoid dead lock.