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公开(公告)号：US09973487B2
公开(公告)日：2018-05-15
申请号：US15012915
申请日：2016-02-02
Inventor： Yoshihiro Ujiie , Motoji Ohmori , Hideki Matsushima , Tomoyuki Haga , Manabu Maeda , Yuji Unagami
CPC classification number: H04L63/08 , G06F21/44 , H04L9/3268 , H04L12/2803 , H04L12/4625 , H04L63/0823 , H04L63/101
Abstract: An authentication method for at least one of a plurality of devices connected to a HAN includes checking, with a first device among the plurality of devices, validity of a second device using a CRL including attribute information regarding the second device among the plurality of devices, and revoking, with the first device, the second device if a result of the checking is negative.
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公开(公告)号：US09725073B2
公开(公告)日：2017-08-08
申请号：US15183443
申请日：2016-06-15
Inventor： Tomoyuki Haga , Hideki Matsushima , Manabu Maeda , Yuji Unagami , Yoshihiro Ujiie , Takeshi Kishikawa
CPC classification number: B60R25/307 , B60R2325/108 , H04L9/0891 , H04L9/3242 , H04L67/12 , H04L2209/84
Abstract: An anti-fraud method for use in an in-vehicle network system including a plurality of electronic control units that exchange data frames, each having added thereto a message authentication code (MAC), via at least one bus includes: receiving a data frame transmitted on the bus; generating a first MAC by using a MAC key and a value of a counter that counts the number of times a data frame having added thereto a MAC is transmitted; in a case where the verification has failed, (i) generating as second MAC by using an old MAC key; (ii) re-verifying that the received data frame has added thereto the generated second MAC; transmitting, in a case where the re-verification has succeeded, via the bus a key-update frame indicating a request for updating the MAC key; and updating the MAC key in response to the transmission of the key-update frame.
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公开(公告)号：US12292954B2
公开(公告)日：2025-05-06
申请号：US18609846
申请日：2024-03-19
Inventor： Yoshihiro Ujiie , Hideki Matsushima , Makoto Fujiwara
Abstract: An authentication method is used by an automated driving system that includes a vehicle and an external device, the external device communicating with the vehicle to cause the vehicle to implement automated driving. The vehicle holds a first certificate that certifies validity of the vehicle. The external device holds a second certificate that certifies validity of the external device. The authentication method includes: validating a third certificate that certifies validity of a combination of the vehicle and the external device, in accordance with a result of device authentication performed between the vehicle and the external device by reference to the first certificate and the second certificate.
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公开(公告)号：US12003521B2
公开(公告)日：2024-06-04
申请号：US17082431
申请日：2020-10-28
Inventor： Takeshi Kishikawa , Yoshihiro Ujiie , Ryo Hirano , Tohru Wakabayashi
CPC classification number: H04L63/1425 , H04L63/20
Abstract: An anomaly detection device included in a communication network adopting a time-triggered protocol based on a time slot includes: a frame transceiver that receives frames; and an anomaly detector that detects an occurrence of an anomalous frame in accordance with a time slot among a plurality of time slots included in a cycle and the number of repeated cycles of the cycle for each frame. The anomaly detector detects an occurrence of an anomalous frame by verifying a statistic on the frames received while the cycle is repeated a predetermined number of times, which is at least once, against a rule indicating a reference range of the statistic.
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公开(公告)号：US11995181B2
公开(公告)日：2024-05-28
申请号：US17380209
申请日：2021-07-20
Inventor： Takeshi Kishikawa , Ryo Hirano , Yoshihiro Ujiie , Tomoyuki Haga
CPC classification number: G06F21/552 , B60W40/09 , B60W40/12 , G06F21/14 , G06F21/55 , H04L63/1425 , H04W4/48
Abstract: A vehicle surveillance device for an in-vehicle network system that includes one or more electronic control units includes: a frame transmitter and receiver that receives a frame flowing over the in-vehicle network system; and a score calculator that detects a suspicious behavior different from a normal driving behavior based on the frame received by the frame transmitter and receiver and vehicle data including information on one or more frames received by the frame transmitter and receiver prior to receiving the frame, and calculates, based on a detection result, a score indicating a likelihood that reverse engineering has been performed on a vehicle provided with the in-vehicle network system.
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Patent Agency Ranking
公开(公告)号：US11929895B2
公开(公告)日：2024-03-12
申请号：US17854182
申请日：2022-06-30
Inventor： Takeshi Kishikawa , Ryo Hirano , Yoshihiro Ujiie
IPC: H04L43/026 , G07C5/08 , H04L67/12
CPC classification number: H04L43/026 , G07C5/0858 , H04L67/12
Abstract: A communication log aggregation device includes: a communicator that obtains flow information including one or more flow records and first statistical information for each flow from each of collection devices, the one or more flow records each including flow identification information included in a message received by at least one observer that is disposed in a control network system, the flow being classified based on the flow identification information, the collection devices each collecting the one or more flow records and the first statistical information for each flow from the message received by the observer; and a flow aggregator that generates aggregated flow information by performing at least one of the following: (i) selecting at least one of the one or more flow records, (ii) adding second statistical information, and (iii) deleting at least one of the one or more flow records, and outputs the aggregated flow information.
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公开(公告)号：US11829472B2
公开(公告)日：2023-11-28
申请号：US17380228
申请日：2021-07-20
Inventor： Ryo Hirano , Takeshi Kishikawa , Yoshihiro Ujiie , Tomoyuki Haga
CPC classification number: G06F21/56 , G06F21/552
Abstract: An anomalous vehicle detection server includes an anomaly score calculator that detects a suspicious behavior different from a predetermined driving behavior based on pieces of vehicle information that are received from a plurality of vehicles, respectively, and are each based on a vehicle log including the content of an event that has occurred in a vehicle system provided in the vehicle, and acquires an anomaly score of each of the plurality of vehicles that indicates a likelihood that reverse engineering is performed on the vehicle; and an anomalous vehicle determiner that determines whether one vehicle of the plurality of vehicles is an anomalous vehicle based on the anomaly score of the one vehicle and a statistical value of the anomaly scores of two or more vehicles of the plurality of vehicles.
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公开(公告)号：US11296965B2
公开(公告)日：2022-04-05
申请号：US17201839
申请日：2021-03-15
Inventor： Yoshihiro Ujiie , Tomoyuki Haga , Manabu Maeda , Hideki Matsushima , Takeshi Kishikawa , Junichi Tsurumi , Hisashi Kashima , Yukino Toriumi , Takuya Kuwahara
IPC: H04L43/0823 , H04L12/40 , H04W4/48 , H04L41/14 , H04L29/06
Abstract: An abnormality detection method is provided. The abnormality detection method is for detecting an abnormality that may be transmitted to a bus in an on-board network system. The on-board network system includes a plurality of electronic controllers that transmit and receive messages via the bus in a mobility entity. In the abnormality detection method, for example, a gateway transmits identification information to a server and receives a response determining a unit time. An operation process is performed using feature information based on a number of messages received from the bus per the determined unit time and using a model indicating a criterion in terms of a message occurrence frequency. A judgment is made as to an abnormality according to a result of the operation process.
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公开(公告)号：US11223525B2
公开(公告)日：2022-01-11
申请号：US16915187
申请日：2020-06-29
Inventor： Manabu Maeda , Hideki Matsushima , Tomoyuki Haga , Yoshihiro Ujiie , Takeshi Kishikawa
IPC: H04L12/24 , B60R16/023 , G06F11/00 , B60R16/02 , G06F11/36 , G06F8/654 , G06F8/71 , H04L12/46 , H04L12/40 , H04L12/66
Abstract: A gateway device connected to a network used in communication by multiple electronic control units provided on-board a vehicle. The gateway device performs operations including receiving firmware update information that includes updated firmware for one electronic control unit among the electronic control units, and acquiring system configuration information indicating a function of each of the electronic control units connected to the network. The gateway device further performs a controlling operation to update firmware of the one electronic control unit, for which updated firmware is received by the receiving, on a basis of the updated firmware, after an operation verification of the updated firmware is performed in an operating environment appropriately. The operating environment being configured with electronic control units of the same functions as each of the electronic control units indicated by the system configuration information.
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公开(公告)号：US10974669B2
公开(公告)日：2021-04-13
申请号：US16664192
申请日：2019-10-25
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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