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公开(公告)号：US11303547B2
公开(公告)日：2022-04-12
申请号：US17189795
申请日：2021-03-02
Inventor： Hideki Matsushima , Motoji Ohmori , Natsume Matsuzaki , Yuichi Futa , Toshihisa Nakano , Manabu Maeda , Yuji Unagami , Hiroshi Amano , Kotaro Hakoda
Abstract: An information management method collects log information of one or more home electrical apparatuses corresponding to service providers. Display screen data is generated which indicates a status of the log information. The display screen data includes groups of information which each contain information on an apparatus, a service provider corresponding to the apparatus, and log information output from the apparatus. Provision of the log information of each group is individually selectable. The display screen data is provided via a network to a display terminal that performs access to a server device. Information is received from the display terminal, which indicates that selection on whether or not provision of the log information is performed. Provision of the log information is not performed on the selected group when a determination is made that refusal of provision of the log information on the selected group is performed.
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公开(公告)号：US11107300B2
公开(公告)日：2021-08-31
申请号：US16047022
申请日：2018-07-27
Inventor： Yuji Unagami , Junichiro Soeda , Motoji Ohmori
Abstract: A driving management system includes an authentication server, and a vehicle capable of switching between a manual driving mode and an automatic driving mode. The vehicle includes multiple electronic control processors connected to a network inside the vehicle, a first processor that detects switching between the manual driving mode and the automatic driving mode, based on messages issued by one or more electronic control processors of the multiple electronic control processors, and the first processor generates first transaction data including information indicating the detected switching, and a first identifier indicating the vehicle, and transmitting the first transaction data to the authentication server. The authentication server includes a second processor that judges the validity of transaction data including the first transaction data obtained from the vehicle, and the second processor records the transaction data, of which the validity has been verified by the second processor, in a storage device.
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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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公开(公告)号：US10818122B2
公开(公告)日：2020-10-27
申请号：US16115724
申请日：2018-08-29
Inventor： Yuji Unagami , Akira Tanaka , Junichiro Soeda
Abstract: An electronic voting system including a terminal, authentication servers, and voting servers is provided. Each authentication server includes an authentication processor that authenticates a voter using authentication data including a first identifier associated with the voter and authentication information regarding the voter, and a first synchronizer that synchronizes a first blockchain including first transaction data indicating that the voter has been authenticated. Each voting server includes a voting processor that receives, from the terminal, voting data including a second identifier associated with a vote cast by the voter, and voting information indicating the vote. Each voting server further includes a second synchronizer that synchronizes a second blockchain including second transaction data and dummy transaction data with at least one other voting server. The terminal transmits the authentication data to each authentication server and transmits the voting data to at least one of the voting servers.
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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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Patent Agency Ranking
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：US10104076B2
公开(公告)日：2018-10-16
申请号：US15012913
申请日：2016-02-02
Inventor： Yuji Unagami , Manabu Maeda , Hideki Matsushima
Abstract: A system performs mutual authentication between a controller and a first device, creates a group key, shares the group key, and sets the first device as a reference device. The system performs mutual authentication between the controller and a second device, and shares the group key with the second device. Thereafter, the system, performs mutual authentication between the controller and the first device, updates the group key, and shares the updated group key between the controller and the first device. At a group key update timing when the group key is updated, the system performs mutual authentication between the controller and the second device, and shares the updated group key with the second device.
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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：US09832821B2
公开(公告)日：2017-11-28
申请号：US14470643
申请日：2014-08-27
Inventor： Yuji Unagami , Motoji Ohmori
CPC classification number: H05B6/6435 , G06F15/16 , G06F17/30 , G06F19/00 , G06Q50/22 , G06Q99/00 , H05B6/668
Abstract: A control method causes a computer of an information terminal apparatus to perform a process including: receiving, from a first server, first display data causing a user of the information terminal apparatus to confirm the purpose of use of recipe information and asking for the permission to collect the recipe information; accessing a second server and receiving selected recipe information and control data for a cooker for preparation based on the selected recipe information; and when it is selected to permit collecting the recipe information for a purpose of use related to health care, and it is determined that selected recipe information corresponding to the set control data has an identifier indicating that the recipe is for food related to a specific constitution, disorder, disease, or allergy, transmitting the selected recipe information with the identifier, in association with a user ID of the information terminal apparatus, to the first server.
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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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