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公开(公告)号：US20230032210A1
公开(公告)日：2023-02-02
申请号：US17966029
申请日：2022-10-14
Inventor： Masahiro TAGUCHI , Yuji UNAGAMI , Yuuki HIROSE , Tetsuji FUCHIKAMI
IPC: H04L9/32
Abstract: A control method executed by a first device among a plurality of devices that are included in a distributed ledger system, the plurality of devices holding a distributed ledger, the control method including: receiving, from a second device among the plurality of devices, second identification information of the second device through short-range wireless communication, the second device being different from the first device; generating a block that includes transaction data selected from a transaction pool of the first device, the second identification information, and first identification information of the first device; and executing storing processing of storing the block generated in the distributed ledger held by the plurality of devices.
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公开(公告)号：US20220391902A1
公开(公告)日：2022-12-08
申请号：US17888702
申请日：2022-08-16
Inventor： Naohisa NISHIDA , Yuji UNAGAMI
Abstract: A control method is a control method for controlling a first node that manages a first blockchain in a first distributed ledger in a system utilized to use a service object and including the first node and a plurality of second nodes that each manage a second blockchain in a second distributed ledger. The control method includes: generating first transaction data indicating that the service object has been unlocked when the service object is to be used, the first transaction data including a first contract ID uniquely identifying a first contract to use the service object; and storing a block containing the first transaction data in the first blockchain.
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公开(公告)号：US20220391782A1
公开(公告)日：2022-12-08
申请号：US17888657
申请日：2022-08-16
Inventor： Naohisa NISHIDA , Yuji UNAGAMI
Abstract: A control method according to the present disclosure is a control method for controlling a first node that holds a first distributed ledger in a system utilized to use a service object and including the first node and a plurality of second nodes that each hold a second distributed ledger. The control method includes: executing transmission processing for transmitting first transaction data to each of the plurality of second nodes; counting a total number of the second nodes that successfully communicate with the first node in the transmission processing; and storing the first transaction data in the first distributed ledger when the total number counted is greater than a predetermined number, and skipping storing the first distributed ledger in the first transaction data when the total number counted is not greater than the predetermined number.
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公开(公告)号：US20220340039A1
公开(公告)日：2022-10-27
申请号：US17861766
申请日：2022-07-11
Inventor： Yuji UNAGAMI , Motoji OHMORI , Toshihiro INOKUCHI
Abstract: A battery data management method for use in a battery data management system including an electric vehicle and a plurality of authentication servers each including a distributed ledger includes: obtaining, by the electric vehicle, first sensor information about a battery attached to the electric vehicle; generating, by the electric vehicle, first transaction data including the ID of the battery and the first sensor information; obtaining the first transaction data by one authentication server included in the plurality of authentication servers; and recording a block including the first transaction data into the distributed ledger by the one authentication server.
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公开(公告)号：US20220289068A1
公开(公告)日：2022-09-15
申请号：US17829540
申请日：2022-06-01
Inventor： Yuji UNAGAMI , Toshihiro INOKUCHI , Motoji OHMORI
Abstract: A management device includes: a manager that maintains management information by obtaining an identifier of a battery device and an item of position information indicating a position of the battery device a plurality of times and, each time the identifier and the item of position information are obtained, recording the identifier and the item of position information in the management information in association with each other; a determiner that determines whether a same identifier is associated with a plurality of items of position information different from each other at one point in time; and an outputter that outputs information for disabling authentication of the battery device when the determiner determines that the same identifier is associated with the plurality of items of position information, and causes a start process of a vehicle to stop based on a failure of authentication after the information is output.
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Patent Agency Ranking
公开(公告)号：US20220100897A1
公开(公告)日：2022-03-31
申请号：US17546606
申请日：2021-12-09
Inventor： Naohisa NISHIDA , Tatsumi OBA , Yuji UNAGAMI , Tadanori TERUYA , Nuttapong ATTRAPADUNG , Goichiro HANAOKA
Abstract: A secure authentication method includes: deriving a distributed LSH value using secret LSH, taking a first distributed feature amount which is a feature amount of user information distributed through a secret distribution method and encrypted LSH parameters as inputs; deriving a distributed hash value using a secret unidirectional function, taking the distributed LSH value and a distributed key as inputs; decoding the hash value by reversing distribution of the distributed hash value; selecting, from a secret hash table storing sets of a hash value as an index and a distributed feature amount as a data string, a set including a hash value matching the decoded hash value; computing, in secret, similarity between the distributed feature amount in the set and the first distributed feature amount; deriving, in secret, a user authentication result based on the similarity computed; and outputting the derived authentication result.
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公开(公告)号：US20220063435A1
公开(公告)日：2022-03-03
申请号：US17523610
申请日：2021-11-10
Inventor： Yuji UNAGAMI , Toshihiro INOKUCHI , Motoji OHMORI
Abstract: A charging station charges an electric energy storage device, and includes: a battery authenticator that performs mutual authentication with the electric energy storage device connected for charging; a communicator that obtains, from the electric energy storage device whose validity is confirmed in the mutual authentication, a degree of deterioration related to deterioration of the electric energy storage device; a recorder that stores the degree of deterioration obtained by the communicator and that is tamper-resistant; and a controller that does not charge the electric energy storage device when the degree of deterioration of the electric energy storage device indicates that the deterioration is advanced beyond a predetermined threshold value.
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公开(公告)号：US20210279581A1
公开(公告)日：2021-09-09
申请号：US17318513
申请日：2021-05-12
Inventor： Naohisa NISHIDA , Tatsumi OBA , Yuji UNAGAMI , Tadanori TERUYA , Nuttapong ATTRAPADUNG
Abstract: A prediction model conversion method includes: converting a prediction model by converting at least one parameter which is included in the prediction model and is for performing homogenization processing into at least one parameter for performing processing including nonlinear processing, the prediction model being a neural network; and generating an encrypted prediction model that performs prediction processing with input in a secret state remaining secret by encrypting the prediction model that has been converted.
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公开(公告)号：US20210165869A1
公开(公告)日：2021-06-03
申请号：US17172618
申请日：2021-02-10
Inventor： Yuji UNAGAMI , Motoji OHMORI , Hideki MATSUSHIMA
Abstract: Provided is an information processing method of one authentication server in a management system including one or more vehicles and one or more authentication servers. The method includes receiving, from one vehicle of the one or more vehicles, first transaction data which includes a first identifier that uniquely identifies each of one or more electronic control units that have been replaced out of a plurality of electronic control units connected to a network in the one vehicle, and indicates that the one or more electronic control units have been replaced among the plurality of electronic control units. The method further includes verifying validity of the first transaction data, and transmitting a duplicate of the first transaction data to one or more of other authentication servers when the validity of the first transaction data is verified in the verifying.
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60.发明申请公开(公告)号：US20210105143A1
公开(公告)日：2021-04-08
申请号：US17101876
申请日：2020-11-23
Inventor： Yuji UNAGAMI , Manabu MAEDA , Tomoyuki HAGA , Hideki MATSUSHIMA , Jun ANZAI
Abstract: A method for verifying content data to be used in a vehicle is provided. The method includes acquiring content data, acquiring, from partial data divided from the content data, a respective plurality of first hash values, acquiring a signature generated by using the first hash values and a key, acquiring state information that indicates a state of a vehicle, determining an integer N that is greater than or equal to one based on the acquired state information, generating, from N pieces of partial data included in the partial data, respective second hash values, verifying the content data by using each of (a) a subset of the plurality of first hash values respectively generated from partial data other than the N pieces of partial data, (b) the second hash values, and (c) the signature, and outputting information that indicates a result of the verifying.
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