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51.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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52.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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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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Patent Agency Ranking
公开(公告)号：US12155677B2
公开(公告)日：2024-11-26
申请号：US16583996
申请日：2019-09-26
Inventor： Manabu Maeda , Takeshi Kishikawa , Daisuke Kunimune
Abstract: A fraud detection method includes: determining whether a period of a message repeatedly transmitted in an in-vehicle network is anomalous; detecting whether arbitration occurs when the message is transmitted in the in-vehicle network; and determining that the message is an anomalous message, in the case where the period of the message is anomalous and no arbitration occurs when the message is transmitted in the in-vehicle network.
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57.发明授权公开(公告)号：US12021886B2
公开(公告)日：2024-06-25
申请号：US17222325
申请日：2021-04-05
Inventor： Ryo Hirano , Takeshi Kishikawa
CPC classification number: H04L63/1425 , G07C5/008 , G07C5/0808 , G07C5/0816 , H04L12/40169 , H04L2012/40215 , H04L2012/40273
Abstract: A vehicle log transmission device includes: a vehicle log obtainer that obtains the vehicle log; a vehicle state extractor that extracts a vehicle state from the obtained vehicle log; difference generation log storage that stores a list of difference generation logs, each being a vehicle log for each of vehicle states shared between the vehicle log transmission device and a vehicle log analysis server; a difference generation log selector that selects a difference generation log from the list in accordance with the extracted vehicle state; a difference log generator that generates a difference log based on the obtained vehicle log and the selected difference generation log; and a difference log transmitter that transmits, to the vehicle log analysis server, the generated difference log and a difference generation log identifier corresponding to the selected difference generation log.
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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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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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