VEHICLE SECURITY MONITORING APPARATUS, METHOD AND NON-TRANSITORY COMPUTER READABLE MEDIUM

A vehicle security monitoring apparatus is capable of communicating with an in-vehicle network having a function of transmitting log data related to an operation state of an in-vehicle apparatus, and the vehicle security monitoring apparatus is configured to acquire the log data, and to detect an abnormal state in the in-vehicle network based on the acquired log data. The vehicle security monitoring apparatus is configured to estimate an influence range affected by the detected abnormal state, and to manage information indicating the estimated influence range.