A Method for Quantifying the Security of Intrusion Tolerant System

Security is an important QoS attribute for characterizing intrusion tolerant systems. In order to evaluate security performance of an intrusion tolerant system more effectively and directly, quantifying its security is inevitable. From the view of practical application, this paper provides a novel quantifying method. The security of intrusion tolerant systems is quantified to three explicit attributes. Finally, simulation results are presented by using MATLAB.