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公开(公告)号：US11529914B2
公开(公告)日：2022-12-20
申请号：US17194701
申请日：2021-03-08
Inventor： Tomoyuki Haga , Toshihisa Nakano , Jun Anzai , Hideki Matsushima , Yoshihiro Ujiie , Yuji Unagami
IPC: H04L9/32 , B60R16/023 , H04L12/40 , H04L12/46 , H04L12/66
Abstract: A gateway connected to a bus, a bus, and the like used by a plurality of electronic control units for communication includes a frame communication unit that receives a frame, a transfer control unit that removes verification information used to verify a frame from the content of the frame received by the frame communication unit and transfers the frame to a destination bus or that adds verification information to the content of the frame and transfers the frame to the destination bus, and the like.
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公开(公告)号：US11496491B2
公开(公告)日：2022-11-08
申请号：US16788641
申请日：2020-02-12
Inventor： Manabu Maeda , Hideki Matsushima , Tomoyuki Haga , Yuji Unagami , Yoshihiro Ujiie , Takeshi Kishikawa
Abstract: A fraud detecting method for use in an in-vehicle network system including a plurality of electronic control units that communicate with each other via a network includes detecting whether a state of a vehicle satisfies a first condition or a second condition, and switching, upon detecting that the state of the vehicle satisfies the first condition or the second condition, an operation mode of a fraud-sensing electronic control unit connected to the network between a first mode in which a first type of detecting process for detecting a fraudulent message in the network is performed and a second mode in which the first type of detecting process is not performed.
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公开(公告)号：US11113382B2
公开(公告)日：2021-09-07
申请号：US15386055
申请日：2016-12-21
Inventor： Yoshihiro Ujiie , Masato Tanabe , Takeshi Kishikawa , Tomoyuki Haga , Hideki Matsushima
Abstract: A vehicle network system employing a controller area network protocol includes a bus, a first electronic control unit, and a second electronic control unit. The first electronic control unit transmits, via the bus, at least one data frame including an identifier relating to data used for a calculation for obtaining a message authentication code indicating authenticity of transmission content. The second electronic control unit receives the at least one data frame transmitted via the bus and verifies the message authentication code in accordance with the identifier included in the at least one data frame.
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公开(公告)号：US11063971B2
公开(公告)日：2021-07-13
申请号：US16566269
申请日：2019-09-10
Inventor： Yoshihiro Ujiie , Hideki Matsushima , Tomoyuki Haga , Manabu Maeda , Yuji Unagami , Takeshi Kishikawa
Abstract: A method for use in a network communication system including a plurality of electronic controllers that communicate with each other via a bus in accordance with a Controller Area Network (CAN) protocol determines whether or not content of a predetermined field in a frame which has started to be transmitted meets a predetermined condition indicating fraud. In a case where the content of the predetermined field meets the predetermined condition, an error frame is transmitted before an end of the frame is transmitted. A number of times the error frame is transmitted is recorded for each identifier (ID) represented by content of an ID field included in a plurality of frames which has been transmitted. A malicious electronic controller is determined in accordance with the number of times recorded for each ID.
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45.发明授权公开(公告)号：US10992688B2
公开(公告)日：2021-04-27
申请号：US16011677
申请日：2018-06-19
Inventor： Takeshi Kishikawa , Yoshihiro Ujiie , Jun Anzai , Hideki Matsushima , Masato Tanabe
IPC: H04L29/06 , B60W50/14 , H04L9/32 , H04L12/40 , H04L12/26 , H04L29/08 , H04L12/28 , H04L9/08 , H04L9/00
Abstract: An unauthorized activity detection method is provided in an onboard network system having multiple electronic units (ECU) that perform communication via a bus, such that an occurrence of an unauthorized state can be detected by monitoring frames transmitted over the bus. The unauthorized activity detection method determines, by a monitoring electronic control unit using unauthorized activity detection rule information indicating a first condition, whether or not a set of frames received from the bus satisfies the first condition. The first condition being a condition regarding a relation in content between a first frame having a first identifier and a second frame having a second identifier that differs from the first identifier. And the method further detects the occurrence of the unauthorized state in a case where the first condition is not satisfied.
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Patent Agency Ranking
公开(公告)号：US10979245B2
公开(公告)日：2021-04-13
申请号：US16860353
申请日：2020-04-28
Inventor： Yoshihiro Ujiie , Hideki Matsushima , Toshihisa Nakano , Tohru Wakabayashi , Hiroshi Amano , Tomoyuki Haga , Takeshi Kishikawa
IPC: H04L12/40 , H04L29/06 , H04L12/46 , H04B1/3822 , H04L12/66
Abstract: A gateway device for a vehicle network system is provided. The vehicle network system includes a first network, a second network, a first electronic control unit connected to the first network, a second electronic control unit connected to the second network, and the gateway device connected to the first network and the second network. The gateway device receives a first frame transmitted to the first network by the first electronic control unit; determines whether or not the first frame is appropriate; generates a second frame when the first frame is not determined to be appropriate; and transmits the second frame to the second network. The second frame includes control information and additional information based on content of the first frame. The control information restricts processing of the additional information included in the second frame by the second electronic control unit.
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47.发明授权公开(公告)号：US10902109B2
公开(公告)日：2021-01-26
申请号：US15873952
申请日：2018-01-18
Inventor： Takeshi Kishikawa , Yoshihiro Ujiie , Manabu Maeda , Hideki Matsushima , Hiroshi Amano , Toshihisa Nakano
Abstract: A misuse detection electronic control unit in a vehicle network system including a plurality of electronic control units that communicate with one another through buses in accordance with a CAN protocol includes a transceiver unit that performs a reception step of receiving a target data frame and a reference data frame transmitted through the buses, wherein the target data frame is a data frame having a first identifier and wherein the reference data frame is a data frame having a second identifier different from the first identifier and a misuse detection process unit that performs a detection step of performing, as misuse detection for the target data frame, evaluation in accordance with a reception timing of the reference data frame and a reception timing of the target data frame on the basis of a certain rule specifying a reception interval between the reference data frame and the target data frame.
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48.发明授权公开(公告)号：US10826687B2
公开(公告)日：2020-11-03
申请号：US16686855
申请日：2019-11-18
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.
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公开(公告)号：US10227053B2
公开(公告)日：2019-03-12
申请号：US15163234
申请日：2016-05-24
Inventor： Yoshihiro Ujiie , Hideki Matsushima , Tomoyuki Haga , Manabu Maeda , Yuji Unagami , Takeshi Kishikawa
Abstract: A method for use in an in-vehicle network system is provided. The in-vehicle network system includes a plurality of electronic control units that communicate a data frame having a message authentication code (MAC) added thereto with one another via a bus in accordance with the Controller Area Network (CAN) protocol. The method includes detecting the state of a vehicle having the in-vehicle network system mounted therein and updating a MAC key used to generate the MAC under the condition that the detected state of the vehicle is a predetermined state.
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公开(公告)号：US10158717B2
公开(公告)日：2018-12-18
申请号：US15076650
申请日：2016-03-22
Inventor： Takeshi Kishikawa , Hideki Matsushima , Tomoyuki Haga , Manabu Maeda , Yuji Unagami , Yoshihiro Ujiie
Abstract: A fraud detection method for use in an in-vehicle network system including a plurality of electronic control units that communicate with one another via a bus in accordance with Controller Area Network (CAN) protocol is provided. The method includes receiving at least one data frame sent to the bus, verifying a specific identifier in the received data frame only if the received data frame does not follow a predetermined rule regarding a transmission period and a state of a vehicle having the in-vehicle network system mounted therein is a predetermined state, detecting the received data frame as an authenticated data frame if the verification is successful, and detecting the received data frame as a fraudulent data frame if the verification fails.
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