US 12,455,959 B2
Intrusion detection system
Hiroshi Okuyama, Tokyo (JP); and Toshinori Matsui, Tokyo (JP)
Assigned to MITSUBISHI ELECTRIC CORPORATION, Tokyo (JP)
Appl. No. 18/683,513
Filed by Mitsubishi Electric Corporation, Tokyo (JP)
PCT Filed Oct. 25, 2021, PCT No. PCT/JP2021/039280
§ 371(c)(1), (2) Date Feb. 14, 2024,
PCT Pub. No. WO2023/073761, PCT Pub. Date May 4, 2023.
Prior Publication US 2024/0354398 A1, Oct. 24, 2024
Int. Cl. G06F 21/55 (2013.01); G06F 21/60 (2013.01)
CPC G06F 21/55 (2013.01) [G06F 21/602 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An intrusion detection system which performs detection on unauthorized data which enters into a control device of a motor vehicle where the control device is connected by way of a communications line, the intrusion detection system, comprising:
a monitor listing for setting a rule on which determination is performed whether communications data is normal or abnormal in every one of respective states;
intrusion detection circuitry for acquiring communications data flowing through the communications line, and for performing, by comparing said communications data with said monitor listing, determination on a presence or absence of abnormality in said communications data;
state management circuitry for acquiring a state of a host motor vehicle and/or that of the control device, and for changing over said monitor listing for use in the intrusion detection circuitry;
processing time management circuitry for giving rise to increasing a processing time of the intrusion detection circuitry in accordance with processing content of the intrusion detection circuitry.