公开(公告)号：US10713106B2

公开(公告)日：2020-07-14

申请号：US15770182

申请日：2016-12-09

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Masato Tanabe ,  Jun Anzai ,  Manabu Maeda ,  Yoshihiro Ujiie ,  Takeshi Kishikawa

IPC: G06F11/00 ,  G06F11/07 ,  H04L12/24 ,  H04L12/40 ,  H04L12/26 ,  H04W4/48 ,  H04L29/06 ,  H04L29/08

Abstract: A communication unit receives a message in a network. A first anomaly detector detects an anomalous message by detecting values of a plurality of monitoring items from the message received by the communication unit and determining whether each of the detected values of the plurality of monitoring items is inside a corresponding first reference range and a corresponding second reference range. The second reference range is narrower than the first reference range. The first anomaly detector detects the message as the anomalous message, when any of the detected values is outside the first reference range, and detects the message as the anomalous message, when any of the detected values is inside the first reference range and is outside the second reference range and when a predetermined rule is satisfied.