Simulation Analysis of Probabilistic Timing Covert Channels

It is very important to analyze the bandwidth and transmission error rate in the study of probabilistic timing covert channels. For the purpose, a simulation system of probabilistic timing covert channels has been set up in the paper. The simulation results show that (1) the bandwidth and the transmission error rate of probabilistic timing covert channels are closely related to the hardware/software environment, probability factor, time factor and/or coding methods as well as scheduling times; (2) the approximate transmission error rate can be measured with the central limit theorem; (3) it is not accurate to estimate the amount of information leakage based on weak probabilistic bisimulation; and (4) in probabilistic timing covert channels, there exist some characteristics which are different from non-deterministic covert channels.