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8 条记录 (耗时 0.017 秒)

    Detection device, detection method, and program
    1.
    发明授权
    Detection device, detection method, and program 有权

    公开(公告)号：US11411761B2

    公开(公告)日：2022-08-09

    申请号：US16962100

    申请日：2018-12-21

    申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： Toshiki Shibahara ,  Takuma Koyama ,  Yasushi Okano

    IPC分类号： H04L12/28 ,  B60R16/023 ,  H04L5/00 ,  H04L9/40 ,  H04N21/835 ,  H04L12/40

    摘要： A detection device includes: an object data extraction unit that extracts, from one or more pieces of communication data which are transmitted from one or more electronic control units, at least part of a payload contained in communication data that satisfies a predetermined condition, information by which the communication interval between the communication data can be calculated, and a serial number of the communication data as object data; a partial sequence creation unit that creates, using the extracted object data, a partial sequence containing information corresponding to at least part of a payload and information indicating a communication interval from two or more pieces of object data with the same serial number; and a detection unit that detects, using the created partial sequence, predetermined communication data based on the order relation between at least part of a payload and the corresponding part of another payload and a communication interval. The predetermined condition is a condition for extracting only communication data which is transmitted periodically and also in conjunction with a predetermined event.

    Abnormal communication detection apparatus, abnormal communication detection method and program
    2.
    发明授权
    Abnormal communication detection apparatus, abnormal communication detection method and program 有权

    公开(公告)号：US11856006B2

    公开(公告)日：2023-12-26

    申请号：US16761040

    申请日：2018-11-14

    申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： Takuma Koyama ,  Yasushi Okano ,  Masashi Tanaka

    IPC分类号： H04L9/40 ,  G06N20/20 ,  B60R16/023 ,  G06F18/21

    CPC分类号： H04L63/1408 ,  B60R16/0232 ,  G06F18/217 ,  G06N20/20

    摘要： There is provided an abnormal communication detection apparatus capable of reducing over-detection. The abnormal communication detection apparatus includes: a receiving part receiving communication data for learning that includes an identifier and communication data for detection that includes the identifier; a knowledge information acquiring part acquiring knowledge information that is information about at least either temporal characteristics or payload characteristics of the communication data for learning; an allocation rule generating part generating allocation rules that are rules for specifying which communication data having which identifier is to be allocated to which detector among a plurality of detectors, based on the knowledge information; an allocating part allocating the communication data to any of the detectors based on the allocation rules; and the plurality of detectors each of which learns, when the communication data for learning is allocated, a model for detecting whether the communication data allocated to the detector is normal or abnormal, and detects, when the communication data for detection is allocated, whether the communication data for detection is normal or abnormal based on the learned model.

    Prioritizing data using rules for transmission over network
    4.
    发明授权
    Prioritizing data using rules for transmission over network 有权

    公开(公告)号：US11528325B2

    公开(公告)日：2022-12-13

    申请号：US17281539

    申请日：2019-10-10

    申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： Keita Hasegawa ,  Takuma Koyama ,  Yasushi Okano ,  Masashi Tanaka

    IPC分类号： G06F15/16 ,  H04L67/12 ,  H04L67/10

    摘要： A device includes a memory; and a processor configured to execute first determining, for each data item generated in the device, a priority upon transmitting said each data item to an information processing apparatus, based on one or more rules set in advance; second determining, for said each data item, whether or not it is necessary to transmit said each data item to the information processing apparatus, based on the priority determined for said each data item; and transmitting a data item to the information processing apparatus among data items generated in the device for a predetermined period of time, the data item being determined by the second determining that it is necessary to transmit the data item to the information processing apparatus.

    Attack communication detection device, attack communication detection method, and program
    7.
    发明授权
    Attack communication detection device, attack communication detection method, and program 有权

    公开(公告)号：US11588827B2

    公开(公告)日：2023-02-21

    申请号：US16755205

    申请日：2018-10-23

    申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： Yasushi Okano ,  Takuma Koyama

    IPC分类号： H04L9/40 ,  G06N20/00 ,  H04L12/40 ,  H04L12/413

    摘要： An attack communication detection device that is robust against a deviation from the design value of a communication interval is provided. The attack communication detection device is an attack communication detection device that detects an attack communication from a communication of each electronic control unit in a communication network and includes: a receiving unit that receives communication data for detection which may or may not include an attack communication; a sum-of-communication-intervals calculation unit that calculates the sum of communication intervals, which is the sum of two adjacent communication intervals, of the communication data for detection; an estimated distribution model storage that stores in advance an estimated distribution model of a communication interval and the sum of communication intervals of communication data for learning which does not include an attack communication; and a detection unit that detects whether or not the communication data for detection includes an attack communication based on the estimated distribution model and the sum of communication intervals of the communication data for detection.

    Bit assignment estimating device, bit assignment estimating method, and program
    8.
    发明授权
    Bit assignment estimating device, bit assignment estimating method, and program 有权

    公开(公告)号：US11128400B2

    公开(公告)日：2021-09-21

    申请号：US16761833

    申请日：2018-11-14

    申请人： NIPPON TELEGRAPH AND TELEPHONE CORPORATION

    发明人： Takuma Koyama ,  Masashi Tanaka ,  Yasushi Okano

    IPC分类号： H04L1/00 ,  H04L1/16

    摘要： A bit assignment estimating device that accurately estimates bit assignment of a payload with fewer division patterns is provided. The bit assignment estimating device: divides a payload of received communication data to generate a plurality of blocks; estimates bit assignment of a block to be a certain value type; concatenates a block, which is adjacent to either of a block or a concatenation block which is estimated to be the continuous value type at a higher-order bit side, to the block or the concatenation block which is estimated to be the continuous value type when the block adjacent is estimated to be the status value type or the continuous value type; estimates whether the concatenation block is the continuous value type or not; and separates an immediately-close-concatenated block from a corresponding concatenation block when the concatenation block is estimated not to be the continuous value type.