公开(公告)号：US20190275891A1

公开(公告)日：2019-09-12

申请号：US16286850

申请日：2019-02-27

Applicant: DENSO CORPORATION

Inventor： Takahiro SHIDAI

IPC: B60L3/12 ,  G07C5/00 ,  H04L29/08

Abstract: A master electronic control device for a vehicle is provided as follows. A vehicle time, which is managed by the master electronic control device to be used in common with a slave electronic control device, is transmitted to the slave electronic control device. Device log information is received from the slave electronic control device, the device log information including (i) a content of an event in the slave electronic control device, (ii) a device time in the slave electronic control device when the event is detected, and (iii) information on vehicle time reception state. The device time included in the device log information is converted into the vehicle time that corresponds to the device time in response to that the information on vehicle time reception state indicates that, when the event is detected, the slave electronic control device has not received the vehicle time.

公开(公告)号：US20220247772A1

公开(公告)日：2022-08-04

申请号：US17724970

申请日：2022-04-20

Applicant: DENSO CORPORATION

Inventor： Naoya ISHIDA ,  Takahiro SHIDAI ,  Taiji ABE

IPC: H04L9/40

Abstract: In an attack monitoring center apparatus, an event log transmitted from an attack monitoring terminal apparatus is received via a communication network. A first pattern and a second pattern are read from an event log occurrence pattern database which describes event log occurrence patterns. The first pattern is referred to in response to an abnormality being detected in the attack monitoring center apparatus; the second pattern is referred to in response to an abnormality being detected in the attack monitoring terminal apparatus. An abnormality is detected based on the event log and the first pattern. The second pattern is transmitted to the attack monitoring terminal apparatus in response to detecting the abnormality based on the event log and the first pattern.

公开(公告)号：US20200151361A1

公开(公告)日：2020-05-14

申请号：US16738927

申请日：2020-01-09

Applicant: DENSO CORPORATION ,  TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Takahiro SHIDAI ,  Yusuke SATOH

IPC: G06F21/64 ,  G06F21/44 ,  H04L9/32 ,  G06F1/3203

Abstract: An electronic control device includes: a memory that stores a plurality of divided programs obtained by dividing a program and a verification authenticator, a cryptographic operator that generates a partial authenticator for each of the plurality of divided programs in a cryptographic operation; and a verification unit that generates a operation authenticator by performing a logic operation using the plurality of partial authenticators, and verifies a falsification of the program by determining whether the verification authenticator and the operation authenticator match.

公开(公告)号：US20200312060A1

公开(公告)日：2020-10-01

申请号：US16827772

申请日：2020-03-24

Applicant: DENSO CORPORATION

Inventor： Takahiro SHIDAI ,  Masumi EGAWA ,  Keita HAYAKAWA ,  Toru HASEGAWA ,  Naoya ISHIDA

IPC: G07C5/08 ,  H04L29/08 ,  H04L12/26 ,  H04L12/66 ,  H04L12/40

Abstract: A message monitoring system includes a first electronic control unit and a second electronic control unit connected to the first electronic control unit via a communication network. In the first electronic control unit, a first message is generated; a first feature value representing a feature of the first message is calculated; a second message storing the first feature value is generated; and the first message is transmitted whereas the second message is transmitted periodically. In the second electronic control unit, the first message and the second message are received from the first electronic control unit; a second feature value representing a feature of the received first message is calculated; and a comparison is performed between (i) the first feature value stored in the received second message and (ii) the calculated second feature value; and whether the first message is normal is determined based on a result of the comparison.