公开(公告)号：US10826687B2

公开(公告)日：2020-11-03

申请号：US16686855

申请日：2019-11-18

Applicant: PANASONIC INTELLECTUAL PROPERTY CORPORATION OF AMERICA

Inventor： Yoshihiro Ujiie ,  Jun Anzai ,  Yoshihiko Kitamura ,  Masato Tanabe ,  Takeshi Kishikawa

IPC: H04L9/08 ,  H04L29/06 ,  B60R16/023 ,  H04L29/08

Abstract: A key management method serves as an electronic control unit (ECU) in an onboard network system having a plurality of ECUs that perform communication by frames via a network. The method includes storing a shared key, acquiring a session key, and executing encryption processing using the session key. The method further includes executing inspection of a security state of the shared key stored in a case where a vehicle is in at least one of the following particular states: the vehicle is not driving and is an accessory-on state; a fuel cap of the vehicle is open, and the vehicle is not driving and is fueling; the vehicle is parked, which is indicated by the gearshift; the vehicle is in a stopped state before driving, which is indicated by the gearshift; and a charging plug is connected to the vehicle, and the vehicle is electrically charging.