Patents by Inventor Masahiko Takenaka

Masahiko Takenaka 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).

  • Patent number: 10562564
    Abstract: A work vehicle is articulated with a front frame and a rear frame linked to the front frame. The work vehicle includes a hydraulic actuator, a control valve, an operation member and a force imparting component. The hydraulic actuator is configured to be hydraulically driven to change a steering angle of the front frame with respect to the rear frame. The control valve is configured to control flow of fluid supplied to the hydraulic actuator. The operation member is linked to the control valve and configured to be operated by an operator. The force imparting component is configured to impart an assist force or a counterforce to an operation of the operation member.
    Type: Grant
    Filed: October 26, 2016
    Date of Patent: February 18, 2020
    Assignee: KOMATSU LTD.
    Inventors: Masanori Ikari, Masanobu Nakabayashi, Yuita Takenaka, Masahiko Hamaguchi, Jun Itou, Kenichi Muramoto
  • Patent number: 10425227
    Abstract: An information processing terminal generates a shared key by a public key cryptosystem using an identifier. The information processing terminal calculates a first calculation value by using an algorithm that outputs an element on an extension field of a prime field from two points on an additive cyclic group on an elliptic curve that is defined by the prime field. The information processing terminal holds the first calculation value. The information processing terminal calculates a second calculation value from a variable using an identifier of a sharer that shares the shared key, a private key of the information processing terminal, and the algorithm. The information processing terminal generates the shared key by executing a final exponentiation to each of the exponentiation of the first calculation value and the second calculation value.
    Type: Grant
    Filed: December 20, 2016
    Date of Patent: September 24, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Yumi Sakemi, Ikuya Morikawa, Masahiko Takenaka
  • Patent number: 10419430
    Abstract: A first device generates first encrypted data from a second public key corresponding to second ID regarding a second device and a first random number and transmits first ID regarding the first device, second ID, and first encrypted data. The second device generates second encrypted data from a first public key corresponding to the first ID and a second random number, generates second verification data by generating a second shared-key candidate from the second random number, the first encrypted data, and a second private key, and transmits the second encrypted data and second verification data. The first device generates first verification data by generating a first shared-key candidate from the first random number, the second encrypted data, and a first private key and transmits the first verification data. The first and second devices examine the second and first verification data by using the first and second shared-key candidates, respectively.
    Type: Grant
    Filed: January 13, 2017
    Date of Patent: September 17, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Ikuya Morikawa, Yumi Sakemi, Masahiko Takenaka
  • Patent number: 10348743
    Abstract: A method includes executing a determination process that determines that a setting value is a search key, the setting value being for an item from among a plurality of items in a record identified in a plurality of records, the plurality of records relating to a plurality of pieces of log information that are collected from a plurality of computers; executing a first identification process that identifies, as the record, another record including the search key from among the plurality of records; executing a second identification process that identifies, as the item, a new item from among the plurality of items, the new item being different from an item used to identify the another record in the executing of the first identification process; repeating executing of the processes; and outputting information on at least one computer that is suspected of a cyber-attack, based on the identified records.
    Type: Grant
    Filed: June 27, 2016
    Date of Patent: July 9, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Mebae Yamaoka, Takanori Oikawa, Kazuyoshi Furukawa, Masahiko Takenaka, Yuki Fujishima, Masanobu Morinaga
  • Patent number: 10339314
    Abstract: A device includes: a memory configured to store in advance a command transmitted from malware to hardware via an operating system; and a processor coupled to the memory and configured to: hook a first command transmitted from the operating system to the hardware, and transmit information that causes the malware to determine to terminate operation of the malware to the operating system when the hooked first command corresponds with the command stored in the memory.
    Type: Grant
    Filed: August 25, 2016
    Date of Patent: July 2, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Takanori Oikawa, Kazuyoshi Furukawa, Hirotaka Kokubo, Mebae Yamaoka, Masahiko Takenaka
  • Patent number: 10291630
    Abstract: A monitoring apparatus, includes a memory configured to store history information regarding a login attempt to a system by a communication apparatus in a state in which a first address is set, the system being a target to be monitored, and set a second address, and a processor coupled to the memory and configured to extract, from the history information, at least one of a variance of a number of login attempts per unit time and a length of a time of the login attempts, determine whether an attack in which accesses are attempted while an address is changed was executed on the system, according to the at least one of the variance and the length of the time, and add the second address of the system to a list that manages systems that had the attack when it is determined that the attack was executed.
    Type: Grant
    Filed: January 6, 2016
    Date of Patent: May 14, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Satomi Saito, Satoru Torii, Masahiko Takenaka
  • Patent number: 10284572
    Abstract: A management method comprising, extracting, using a processor, psychological characteristics that are characteristic of people who have experienced a certain incident; extracting, using the processor, behavioral characteristics that are characteristic of people who have experienced a certain incident; obtaining, using the processor, a relational expression between each item of the extracted psychological characteristics and a plurality of items of the extracted behavioral characteristics; and calculating, using the processor, a psychological characteristic value from the relational expression of each psychological characteristic item and a value of log data for each user and, distributing, using the processor, to any user whose psychological characteristic value exceeds a predetermined value, a measure devised for the exceeded psychological characteristic.
    Type: Grant
    Filed: February 25, 2015
    Date of Patent: May 7, 2019
    Assignee: FUJITSU LIMITED
    Inventors: Takeaki Terada, Yoshinori Katayama, Masanobu Morinaga, Masahiko Takenaka
  • Patent number: 10009271
    Abstract: It is determined whether or not the address of a first type specified in an address resolution query is an address that allows direct routing to a first network. If the direct routing is determined to be allowed, a routing table is configured such that a packet including, as a destination, the address of a second type obtained by the address resolution query is forwarded to the first network. If the direct routing is determined not to be allowed, the routing table is configured such that a packet including the obtained address of the second type as a destination is forwarded to a second network.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: June 26, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Masahiko Takenaka, Kunikazu Matsumoto, Daisuke Shinomiya, Yutaka Takahashi, Hiroaki Sakai
  • Publication number: 20180150633
    Abstract: A software detection device, the device including a memory and a processor coupled to the memory and the processor configured to execute a process, the process including generating at least one notification in response to at least one countermeasure process applied to a program to address a vulnerability to a software attack, each of the at least one notification including a countermeasure identifier to identify a countermeasure process performed, monitoring the at least one generated notification, and determining presence of the software attack based on the monitoring.
    Type: Application
    Filed: November 22, 2017
    Publication date: May 31, 2018
    Applicant: FUJITSU LIMITED
    Inventors: Kazuyoshi Furukawa, Masahiko TAKENAKA, Hirotaka KOKUBO
  • Patent number: 9942123
    Abstract: A communication monitoring device is used in a network that includes a plurality of nodes. The communication monitoring device includes: a plurality of ports; and a processor. The processor is configured to execute a procedure including: detecting an abnormal frame from among received frames, a first arrival port at which the abnormal frame has arrived, and an order in which the abnormal frame arrived in received frames that have arrived at any of the plurality of ports, and transmitting order information that indicates the detected order to a node connected to the first arrival port.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: April 10, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Jun Yajima, Takayuki Hasebe, Masahiko Takenaka
  • Patent number: 9913825
    Abstract: A method of ameliorating symptoms of uremia includes administering a therapeutic agent including beraprost or each isomer constituting beraprost, or a salt thereof as an effective ingredient to an animal belonging to the Family Canidae, wherein an effective dosage is a dosage that does not significantly lower blood pressure.
    Type: Grant
    Filed: April 27, 2017
    Date of Patent: March 13, 2018
    Assignee: Toray Industries, Inc.
    Inventors: Masahiko Takenaka, Yoshihisa Yamane, Nobutaka Ida, Hajimu Kurumatani
  • Publication number: 20180068120
    Abstract: A method for malware detection includes: executing transmission processing that includes adding information pertaining to a specific file to a file list obtained from a storage device upon receiving a transmission command for the file list from an application, and transmitting, to the application, the file list to which the information pertaining to the specific file has been added; and executing determination processing that includes determining that the application is malware upon receiving an operating command pertaining to the specific file from the application.
    Type: Application
    Filed: August 16, 2017
    Publication date: March 8, 2018
    Applicant: Fujitsu Limited
    Inventors: Hirotaka Kokubo, Kazuyoshi Furukawa, Masahiko Takenaka
  • Patent number: 9860060
    Abstract: A method according to an embodiment includes transforming registered data on a user, which is encrypted with an encryption algorithm that enables a calculation of a Hamming distance in an encrypted state, such that a calculation result of a Hamming distance between the registered data and verification data that is encrypted with the algorithm includes a Hamming distance between the verification data and the user's registered data and a Hamming distance between the verification data and a random vector generated from the user's registered data; calculating a Hamming distance between the verification data and the registered data; and determining whether the input verification data is false based on a result of comparison of each of the Hamming distance between the verification data and the user's registered data and the Hamming distance between the verification data and the random vector included in the calculated Hamming distance with a threshold.
    Type: Grant
    Filed: December 15, 2015
    Date of Patent: January 2, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Yumi Sakemi, Masahiko Takenaka, Masaya Yasuda
  • Publication number: 20170331857
    Abstract: A non-transitory recording medium storing a data protection program causing a computer to perform a process, the process includes: storing, in a memory, a first command to be transmitted from a malware to an operating system; hooking a second command that has been transmitted from an application to the operating system; determining whether the second command is stored in the memory; and switching a destination of writing data by the operating system from a first hardware to a second hardware when the second command is stored in the memory.
    Type: Application
    Filed: February 9, 2017
    Publication date: November 16, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Kazuyoshi Furukawa, Hirotaka KOKUBO, TAKANORI OIKAWA, Masahiko TAKENAKA
  • Patent number: 9813451
    Abstract: An apparatus includes a memory, and a processor coupled to the memory and configured to specify a communication source device that performs a plurality of traffic confirmations of communications with a plurality of first devices, and control to discard a plurality of first authentication requests for the plurality of first devices generated by the communication source device after performing the plurality of traffic confirmations of communications.
    Type: Grant
    Filed: July 20, 2015
    Date of Patent: November 7, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Satomi Honda, Masahiko Takenaka, Satoru Torii
  • Publication number: 20170302682
    Abstract: A device for analyzing malware includes a memory and a processor coupled to the memory. The memory is configured to store therein an instruction assumed to be transmitted to an operating system from malware. The processor is configured to hook a first instruction transmitted to the operating system from an application. The processor is configured to determine whether the first instruction is stored in the memory. The processor is configured to copy data stored in first hardware to second hardware different from the first hardware upon determining that the first instruction is stored in the memory. The first hardware is accessed by the operating system.
    Type: Application
    Filed: February 14, 2017
    Publication date: October 19, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Hirotaka KOKUBO, Masahiko TAKENAKA, Kazuyoshi Furukawa, TAKANORI OIKAWA
  • Patent number: 9783518
    Abstract: A therapeutic agent and a treatment method for uremia of human and animals, which therapeutic agent can be easily taken, has lower side effects, and which is not expensive in view of medical economics, are disclosed. The therapeutic agent for uremia in patients suffering from chronic renal failure comprises as an effective ingredient a prostaglandin I2 derivative having a specific structure, such as beraprost sodium. The therapeutic agent for uremia ameliorates the uremia concurred in patients with chronic renal failure without accompanying side effects, and restoration of decreased appetite, improvements in activities, increase in body weight and the like are achieved. The therapeutic effect of uremia is clear alleviation or disappearance of symptoms of uremia grasped as clinical symptoms, observed in the state of renal failure, especially even in spite of the state wherein the decrease in renal function is progressed.
    Type: Grant
    Filed: July 7, 2006
    Date of Patent: October 10, 2017
    Assignee: Toray Industries, Inc.
    Inventors: Masahiko Takenaka, Yoshihisa Yamane, Nobutaka Ida, Hajimu Kurumatani
  • Patent number: 9772819
    Abstract: An apparatus for generating physical random numbers includes a physical random number generator configured to generate physical random numbers, a test unit configured to perform a test process to check randomness of the physical random numbers, a minimum entropy estimating unit configured to estimate a minimum entropy based on statistical information generated as a byproduct of the test process, an entropy compressing unit configured to perform an entropy compression process using the physical random numbers as an input, and an entropy control unit configured to control based on the minimum entropy a number of bits of the physical random numbers input into the entropy compression process performed by the entropy compressing unit.
    Type: Grant
    Filed: November 17, 2014
    Date of Patent: September 26, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Hirotaka Kokubo, Dai Yamamoto, Masahiko Takenaka, Kazuyoshi Furukawa, Tetsuya Izu
  • Patent number: 9749135
    Abstract: From the least significant bit of the current secret key, k bits are retrieved, obtaining a binary window sequence. A binary bit string of concatenation of the random number to the more significant bits of the window sequence is obtained if the most significant bit of the window sequence is 0, subtracting a bit string from the current secret key to obtain a new secret key, or the bit string of a complement of the base number for the window sequence in binary system is calculated if the most significant bit of the window sequence is 1, obtaining a bit string by adding a minus sign to a bit string obtained by concatenating the random number to the more significant bits of the bit string, subtracting the bit string from the current secret key to obtain a new secret key.
    Type: Grant
    Filed: June 23, 2016
    Date of Patent: August 29, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Jun Yajima, Kouichi Itoh, Masahiko Takenaka, Dai Yamamoto
  • Publication number: 20170224652
    Abstract: A method of ameliorating symptoms of uremia includes administering a therapeutic agent including beraprost or each isomer constituting beraprost, or a salt thereof as an effective ingredient to an animal belonging to the Family Canidae, wherein an effective dosage is a dosage that does not significantly lower blood pressure.
    Type: Application
    Filed: April 27, 2017
    Publication date: August 10, 2017
    Inventors: Masahiko Takenaka, Yoshihisa Yamane, Nobutaka Ida, Hajimu Kurumatani