A Self Adaptive Jamming Strategy to Restrict Covert Timing Channel

Covert timing channel may compromise multi-level security system, it's necessary to eliminate or restrict them. Jamming covert timing channel is a main method to restrict the channel's capacity, but existing works' jamming strategies don't take the packets arriving rate and queue's length into account, the jamming strategies they use may affect the overt channel's availability. This paper proposes a self adaptive jamming strategy which can adjust the service time according to the packets' arriving rate and the queue's length. The experiment result shows that the new strategy can effectively restrict the covert timing channel and keep the availability of the overt channel.