Abstract
While integrated electronic systems (IESs) are widely used in military and civilian applications, their security issues are barely studied. By analyzing the architecture of the system and the characteristics of bus communication, this paper proposes an intrusion detection method based on the message sequence and behavioral rules of subsystems. According to the bus protocol, messages are divided into periodic and aperiodic messages. For the previous, we adopt sequence analysis and propose an algorithm that extract the sequence intelligently to determine if there are anomalies. For aperiodic messages, we detect the anomalies by modeling the system behaviors as decision trees. Through implementing experiments on our simulation system, we demonstrate that the proposed detection is more accurate than the existing schemes while incurring both lower false negative rate and lower false positive rate.
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