Patents by Inventor Nobuhiro Kobayashi

Nobuhiro Kobayashi has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Publication number: 20210111874
    Abstract: A key management apparatus receives a key request including a first device identification information and a second device identification information, encrypts a common key using the first device identification information to generate a first encrypted common key, encrypts the common key using the second device identification information to generate a second encrypted common key, and transmits a key response including the first encrypted common key and the second encrypted common key. A first device receives the key response, decrypts the first encrypted common key using the first device identification information to obtain the common key, and transmits the second encrypted common key. A second device receives the second encrypted common key and decrypts the second encrypted common key using the second device identification information to obtain the common key.
    Type: Application
    Filed: April 14, 2017
    Publication date: April 15, 2021
    Applicant: Mitsubishi Electric Corporation
    Inventors: Masamichi TANJI, Makoto ITOI, Nobuhiro KOBAYASHI, Teruyoshi YAMAGUCHI
  • Publication number: 20210112062
    Abstract: An object of this invention is to obtain a whitelist generator with which the accuracy of data relating to the specifications of normal communication serving as an automatic generation source can be guaranteed, whereby the accuracy of a generated whitelist can be guaranteed over an entire whitelist generation flow. The whitelist generator is applied to a system formed from a plurality of devices, the plurality of devices being configured to exchange data with each other, in order to generate a whitelist used for whitelisting intrusion detection, and includes a model verification unit that verifies, on the basis of an input model, at least one of whether or not normal communication in the system has been modeled correctly and whether or not the model is logically consistent, and a model conversion unit that converts the verified model into a whitelist.
    Type: Application
    Filed: January 23, 2017
    Publication date: April 15, 2021
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Koichi SHIMIZU, Teruyoshi YAMAGUCHI, Tsunato NAKAI, Takeshi UEDA, Nobuhiro KOBAYASHI, Benoit BOYER
  • Publication number: 20210006570
    Abstract: A state detection section (105) detects states of a plurality of controllers (300, 400) included in a communication system (600). An attack determination section (103) selects, from among a plurality of whitelists (110) each of which is associated with a combination of states, a whitelist (110) associated with the combination of the states of the plurality of controllers (300, 400) detected by the state detection section (105). The attack determination section (103) detects an attack on the communication system (600) by using the selected whitelist (110).
    Type: Application
    Filed: April 26, 2016
    Publication date: January 7, 2021
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Tsunato NAKAI, Teruyoshi YAMAGUCHI, Koichi SHIMIZU, Nobuhiro KOBAYASHI
  • Patent number: 10841087
    Abstract: The present invention relates to a security device which performs processes such as authentication or cryptography, for example a security device for securely holding a key used in a cryptographic process, and a security method therefore.
    Type: Grant
    Filed: November 5, 2015
    Date of Patent: November 17, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Hisashi Fukuda, Takeshi Yoneda, Nobuhiro Kobayashi, Daisuke Suzuki, Manabu Misawa, Koichi Shimizu, Takeshi Sugawara
  • Patent number: 10826915
    Abstract: In the present invention, unauthorized access from outside a facility to a device disposed inside the facility is detected by effectively using the output from a mirror port of a network switch. A gateway device has: a monitored data acquisition unit for saving in a monitored data storage unit, as monitored data, packet data that is outputted from a mirror port of a switch, the packet data being outputted from a device being monitored; an unauthorized access detection unit for detecting unauthorized access by determining whether the monitored data is abnormal on the basis of a comparison between the monitored data and assessment rules; and an unauthorized access notification unit for notifying a server of a monitoring center, which is connected to an external network via an external communication unit, that unauthorized access has been detected.
    Type: Grant
    Filed: June 2, 2015
    Date of Patent: November 3, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Jin Kawasaki, Hiroyasu Tabata, Teruyoshi Yamaguchi, Nobuhiro Kobayashi
  • Publication number: 20200314130
    Abstract: In an attack detection device, a white list storage unit correlates and stores, for each system state, a white list defining system information permitted in the system state. A state estimation unit estimates a current system state of a control system on the basis of communication data communicated between a server device and equipment. An attack determination unit acquires the white list corresponding to the current system state from the white list storage unit, and determines whether or not an attack has been detected, on the basis of the acquired white list and the system information in the current system state.
    Type: Application
    Filed: January 19, 2017
    Publication date: October 1, 2020
    Applicant: Mitsubishi Electric Corporation
    Inventors: Tsunato NAKAI, Teruyoshi YAMAGUCHI, Koichi SHIMIZU, Nobuhiro KOBAYASHI
  • Patent number: 10628140
    Abstract: A block-diagram acquisition unit acquires a block diagram that defines by connection among a plurality of blocks, a data processing procedure to be reflected in a program code. An inconsistency inspection unit inspects whether there is an inconsistency in the data processing procedure defined in the block diagram by tracing the connection among blocks in the block diagram.
    Type: Grant
    Filed: November 17, 2016
    Date of Patent: April 21, 2020
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Takeshi Ueda, Nobuhiro Kobayashi
  • Patent number: 10597524
    Abstract: Provided are a methacrylic resin composition and a film containing a methacrylic resin that includes: 50 mass % to 97 mass % of a methacrylic acid ester monomer unit (A); 3 mass % to 30 mass % of a structural unit (B) having a cyclic structure-containing main chain; and 0 mass % to 20 mass % of another vinyl monomer unit (C) that is copolymerizable with a methacrylic acid ester monomer. The methacrylic resin satisfies the following conditions (1) and (2): (1) the methacrylic resin has a weight average molecular weight of 65,000 to 300,000 as measured by GPC; and (2) the total content of specific components is 0.01 mass % to 0.40 mass % as determined by GC/MS.
    Type: Grant
    Filed: November 14, 2016
    Date of Patent: March 24, 2020
    Assignee: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Fumiki Murakami, Yutaka Tada, Yumika Kurihara, Nobuhiro Kobayashi, Masami Yonemura
  • Publication number: 20200092313
    Abstract: An allowed communication list conversion unit (123) assigns one or more flags to request communication and response communication, between which a correspondence relationship is described in a detection rule, and describes, in an allowed communication list, details of a flag operation specifying a value to be set to the flag and a flag condition for determining whether the value to be set is set in the flag, in association with each other. A determination unit (103) sets the value after determining that communication data on the request communication is normal, determines whether the value is set in the flag based on the flag condition when determining whether communication data on the response communication to the request communication is normal, and determines that the communication data on the response communication is normal when the value is set, to thereby reset the flag.
    Type: Application
    Filed: January 20, 2017
    Publication date: March 19, 2020
    Applicant: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Teruyoshi YAMAGUCHI, Tsunato NAKAI, Koichi SHIMIZU, Nobuhiro KOBAYASHI
  • Patent number: 10570233
    Abstract: A method of producing a copolymer of the present invention is a method of producing a specific copolymer and includes: a pure water production step of producing pure water having an electric conductivity of from 0.1 ?S/cm to 100 ?S/cm; a pure water transfer step of introducing the pure water into a reaction kettle for producing the copolymer through a transfer pipe using, as a material therefor, a resin or a substance forming a passive state in water; and a polymerization step of performing polymerization of the monomer (a), the monomer (b), and the monomer (c) in the reaction kettle, the pure water transfer step including setting the electric conductivity of the pure water at a site where the pure water is introduced from the transfer pipe toward the reaction kettle within a range of from 0.1 ?S/cm to 100 ?S/cm.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: February 25, 2020
    Assignee: NIPPON SHOKUBAI CO., LTD.
    Inventors: Atsushi Okada, Nobuhiro Kobayashi
  • Patent number: 10526432
    Abstract: A method of producing a copolymer of the present invention is a method of producing a specific copolymer and includes: a pure water production step of producing pure water having an electric conductivity of from 0.1 ?S/cm to 100 ?S/cm; a pure water transfer step of introducing the pure water into a reaction kettle for producing the copolymer through a transfer pipe using, as a material therefor, a resin or a substance forming a passive state in water; and a polymerization step of performing polymerization of the monomer (a), the monomer (b), and the monomer (c) in the reaction kettle, the pure water transfer step including setting the electric conductivity of the pure water at a site where the pure water is introduced from the transfer pipe toward the reaction kettle within a range of from 0.1 ?S/cm to 100 ?S/cm.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: January 7, 2020
    Assignee: NIPPON SHOKUBAI CO., LTD.
    Inventors: Atsushi Okada, Nobuhiro Kobayashi
  • Patent number: 10412069
    Abstract: An edit data generation unit concatenates the message authentication code of an X?1th data block with the message authentication code of an Xth data block, thereby generating Xth edit data. An additional data generation unit generates the message authentication code of the Xth edit data, and extracts a portion of the message authentication code of the Xth edit data as Xth additional data. A packet generation unit generates an Xth packet including the Xth data block and the Xth additional data. A packet transmitting unit transmits the Xth packet.
    Type: Grant
    Filed: January 19, 2015
    Date of Patent: September 10, 2019
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Yumiko Murakami, Nobuhiro Kobayashi
  • Publication number: 20190272158
    Abstract: A block-diagram acquisition unit acquires a block diagram that defines by connection among a plurality of blocks, a data processing procedure to be reflected in a program code. An inconsistency inspection unit inspects whether there is an inconsistency in the data processing procedure defined in the block diagram by tracing the connection among blocks in the block diagram.
    Type: Application
    Filed: November 17, 2016
    Publication date: September 5, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Takeshi UEDA, Nobuhiro KOBAYASHI
  • Publication number: 20190141059
    Abstract: A state management unit (210) identifies a state of an operational system, and determines presence or absence of a state transition of the operational system based on the identified state. In a case where there has been a state transition of the operational system, the state management unit determines, with use of a state transition scenario indicating a transition pattern of state transition, whether the state transition of the operational system matches the transition pattern indicated in the state transition scenario. If the state transition of the operational system does not match the transition pattern, an alert output unit (293) outputs an alert. If the state transition of the operational system matches the transition pattern, a whitelist management unit (220) switches whitelists, and an intrusion detection unit (230) performs whitelist-type intrusion detection.
    Type: Application
    Filed: June 23, 2016
    Publication date: May 9, 2019
    Applicant: Mitsubishi Electric Corporation
    Inventors: Koichi SHIMIZU, Teruyoshi YAMAGUCHI, Tsunato NAKAI, Nobuhiro KOBAYASHI
  • Publication number: 20190127504
    Abstract: A method of producing a copolymer of the present invention is a method of producing a specific copolymer and includes: a pure water production step of producing pure water having an electric conductivity of from 0.1 ?S/cm to 100 ?S/cm; a pure water transfer step of introducing the pure water into a reaction kettle for producing the copolymer through a transfer pipe using, as a material therefor, a resin or a substance forming a passive state in water; and a polymerization step of performing polymerization of the monomer (a), the monomer (b), and the monomer (c) in the reaction kettle, the pure water transfer step including setting the electric conductivity of the pure water at a site where the pure water is introduced from the transfer pipe toward the reaction kettle within a range of from 0.1 ?S/cm to 100 ?S/cm.
    Type: Application
    Filed: April 27, 2017
    Publication date: May 2, 2019
    Inventors: Atsushi Okada, Nobuhiro Kobayashi
  • Patent number: 10213881
    Abstract: A brazing sheet includes a core material containing an aluminum alloy including magnesium, a bonding material laminated on at least one side of the core material, and a flux layer. The flux layer is laminated on one side of the bonding material and includes a flux composition. The flux composition includes [A] a flux component containing KAlF4, and [B] AlF3. A substance mass S1 (mol) of magnesium in the bonding material when heated at 585° C., a substance mass S2 (mol) of [A] the flux component containing KAlF4 in the flux layer and a substance mass S3 (mol) of [B] AlF3 satisfy the specific expression.
    Type: Grant
    Filed: April 16, 2014
    Date of Patent: February 26, 2019
    Assignee: Kobe Steel, Ltd.
    Inventors: Nobuhiro Kobayashi, Toshiki Ueda, Shimpei Kimura, Takahiro Izumi
  • Patent number: 10171252
    Abstract: A data determination apparatus of the present invention includes a state transition model storage unit to store a state transition model representing a state transition, a state management unit to hold an operating state of an own apparatus based on the state transition model, a communication permission list storage unit to store, as a communication permission list, communication permitted data whose communications are permitted in respective operating states, a communication unit to obtain communication determination data, and a determination unit to determine whether or not the communication determination data is communication permitted data whose communication has been permitted in a current operating state, using the current operating state and the communication permission list.
    Type: Grant
    Filed: December 22, 2015
    Date of Patent: January 1, 2019
    Assignee: Mitsubishi Electric Corporation
    Inventors: Teruyoshi Yamaguchi, Koichi Shimizu, Nobuhiro Kobayashi, Tsunato Nakai
  • Publication number: 20180347922
    Abstract: Disclosed is an aluminum composite material including an aluminum alloy material containing magnesium, and a bonding material formed by brazing using a flux, the bonding material being adapted to bond the aluminum alloy material thereto. In the aluminum composite material, the bonding material contains a magnesium-containing compound other than KMgF3 and MgF2. The present invention provides an aluminum composite material with satisfactory brazeability to an aluminum alloy material containing magnesium, a heat exchanger including the aluminum composite material, and a flux suitable for use in braze.
    Type: Application
    Filed: August 8, 2018
    Publication date: December 6, 2018
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)
    Inventors: Nobuhiro KOBAYASHI, Motohiro HORIGUCHi, Koichi SAKAMOTO, Toshiki UEDA, Shimpei KIMURA, Takahiro IZUMi
  • Publication number: 20180339374
    Abstract: This brazing flux composition for an aluminum alloy is characterized by containing [A] a flux component containing KAlF4 and [B] a fluoride that does not contain K and that contains elements other than group 1 elements and group 2 elements: being in a particle form of single component of [B] the fluoride; and the added amount (C) (mass %) of [B] the fluoride with respect to [A] the flux component and the average particle size (d) (?m) satisfying formula (1), 0.83C?0.19d<43??(1).
    Type: Application
    Filed: August 3, 2018
    Publication date: November 29, 2018
    Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel. Ltd.)
    Inventors: Nobuhiro KOBAYASHI, Satoshi YOSHIDA, Toshiki UEDA, Shimpei KIMURA, Takahiro IZUMI
  • Publication number: 20180305538
    Abstract: Provided are a methacrylic resin composition and a film containing a methacrylic resin that includes: 50 mass % to 97 mass % of a methacrylic acid ester monomer unit (A); 3 mass % to 30 mass % of a structural unit (B) having a cyclic structure-containing main chain; and 0 mass % to 20 mass % of another vinyl monomer unit (C) that is copolymerizable with a methacrylic acid ester monomer. The methacrylic resin satisfies the following conditions (1) and (2): (1) the methacrylic resin has a weight average molecular weight of 65,000 to 300,000 as measured by GPC; and (2) the total content of specific components is 0.01 mass % to 0.40 mass % as determined by GC/MS.
    Type: Application
    Filed: November 14, 2016
    Publication date: October 25, 2018
    Applicant: ASAHI KASEI KABUSHIKI KAISHA
    Inventors: Fumiki MURAKAMI, Yutaka TADA, Yumika KURIHARA, Nobuhiro KOBAYASHI, Masami YONEMURA