Patents by Inventor Hiroshi Tsuda

Hiroshi Tsuda 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: 10129028
    Abstract: A method of equality verification using relational encryption including receiving a relational key that includes a first relational key component and a registration ciphertext that includes an encryption of a first plaintext data set. The method includes storing the registration ciphertext without decrypting the registration ciphertext. After the storing of the registration ciphertext, the method includes receiving an authentication request and communicating a safeguard data set that includes a random challenge in response to the authentication request. The method includes receiving an encrypted response that is generated based on the safeguard data set and a second plaintext data set. The method includes verifying a relationship between the encrypted response and the registration ciphertext using the relational key without decrypting the encrypted response and without decrypting the registration ciphertext. The relationship indicates that equality exists between the first and the second plaintext data sets.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: November 13, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Ryota Kamakari, Takeshi Shimoyama, Hiroshi Tsuda, Yoshinori Yaginuma, Avradip Mandal, Arnab Roy, Hart Montgomery, Toshiyuki Ishiguro, Kouhei Shigeta
  • Patent number: 9888036
    Abstract: A message sending device includes a processor that executes a process. The process includes: obtaining an operation characteristic during creating a message; adding, to the message, the operation characteristic obtained at the obtaining; and sending the message, to which the operation characteristic has been added at the adding, to a destination of the message.
    Type: Grant
    Filed: February 5, 2015
    Date of Patent: February 6, 2018
    Assignee: FUJITSU LIMITED
    Inventors: Yoshinori Katayama, Hiroshi Tsuda
  • Publication number: 20170351751
    Abstract: A reading support apparatus is disclosed. The reading support apparatus includes a memory; and a processor coupled to the memory. The processor retains, in the memory, a provider address at which a document is registered. The processor monitors connection from a user with respect to the provider address retained in the memory. The processor acquires a word included in the document, the word reading support method used for a search conducted by the user in a state in which the user browses the document corresponding to the provider address, and outputs the word.
    Type: Application
    Filed: May 2, 2017
    Publication date: December 7, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Takeaki Terada, Satoru Torii, Hiroshi Tsuda, Yoshinori Katayama
  • Publication number: 20170337160
    Abstract: A disclosed reading comprehension assistance apparatus includes one or more processors programmed to execute a process. The process includes acquiring information indicating behavior with respect to attention portions of respective users who read a document, specifying a user who properly reads the document based on the acquired information indicating behavior of the attention portions, estimating one or more high attention portions having attention focused on by the high-reliability users who have properly read the document based on the information indicating the behavior with respect to the attention portions, and presenting the one or more high attention portions.
    Type: Application
    Filed: April 28, 2017
    Publication date: November 23, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Takeaki Terada, Satoru Torii, Hiroshi Tsuda, Yoshinori Katayama
  • Patent number: 9785635
    Abstract: A document checking apparatus includes a keyword appearance position extracting unit that extracts keywords and the appearance positions of the keywords from a target document including a confidential document; a keyword pair extracting unit that treats each keyword of the appearance positions of the extracted keywords as a target and determines whether there is another extracted keyword within a predetermined range before and after the target keyword; a feature element matrix creating unit that generates, when it is determined that there is the another keyword, combination information obtained by combining the determination target keyword and the another keyword in association with anteroposterior information of the appearance positions of the keywords; and a computing unit that determines whether the number of combination information, among the plurality of combination information of the generated target document, identical to the combination information of the confidential document is not less than a prede
    Type: Grant
    Filed: April 30, 2013
    Date of Patent: October 10, 2017
    Assignee: FUJITSU LIMITED
    Inventor: Hiroshi Tsuda
  • Patent number: 9760616
    Abstract: A computer is disclosed that performs an electronic mail creation process. The computer creates an electronic mail by referring to a storage part in which received electronic mails are stored, using at least one electronic mail of the received electronic mails stored in the storage part, the at least one electronic mail selected based on a criteria being set beforehand, and changing at least one of header information and a body text of the at least one electronic mail.
    Type: Grant
    Filed: September 5, 2014
    Date of Patent: September 12, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Takeaki Terada, Satoru Torii, Masanobu Morinaga, Ikuya Morikawa, Kouichi Itoh, Hiroshi Tsuda
  • Publication number: 20170228538
    Abstract: A safety determining apparatus includes a memory and a processor coupled to the memory. The processor is configured to acquire information on a user operation and an access target of the user operation, acquire information indicating a behavior of refraining from gaining access with respect to the access target by analyzing the user operation, and provide a user with information on the safety of the access target with respect to which the behavior has been executed.
    Type: Application
    Filed: January 19, 2017
    Publication date: August 10, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Yoshinori Katayama, Takeaki Terada, Satoru Torii, Hiroshi Tsuda
  • Publication number: 20170208023
    Abstract: Provided are a memory, and a processor coupled to the memory. The processor is configured to detect a size of a display area for displaying respective selection areas associated with a plurality of selection candidate files that are selectable as an operation-target file, and a total display size of the selection areas for the selection candidate files displayed on the display area, and output an alert for prompting a confirmation of the file selected as the operation-target file, when a ratio of the total display size to the size of the display area exceeds a threshold.
    Type: Application
    Filed: January 13, 2017
    Publication date: July 20, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Yoshinori Katayama, Takeaki Terada, Satoru Torii, Hiroshi Tsuda
  • Publication number: 20170169452
    Abstract: A risk calculation method includes: calculating a risk value based on psychological characteristic information indicating psychological characteristics unique to a user, and behavior characteristic information indicating behavior characteristics unique to the user in a predetermined time period obtained from a behavior history in the predetermined time period, among pieces of history information in which the behavior history of the user is recorded by a processor; and outputting alerts with respect to a user who has the calculated risk value exceeding a predetermined reference value by the processor.
    Type: Application
    Filed: November 30, 2016
    Publication date: June 15, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Takeaki Terada, Hiroshi Tsuda, Satoru Torii, Yoshinori Katayama
  • Patent number: 9660991
    Abstract: A method includes receiving biometric data, the biometric data non-uniformly distributed and processing the biometric data to a level of randomness as a plaintext vector, the level of randomness associated with a security level. The method also includes encrypting the plaintext vector using a relational linearity encryption scheme to generate a linearity ciphertext representative of the plaintext vector, encrypting the plaintext vector using a relational proximity encryption scheme to generate a proximity ciphertext representative of the plaintext vector, and communicating the linearity ciphertext and the proximity ciphertext to an authentication server.
    Type: Grant
    Filed: February 10, 2016
    Date of Patent: May 23, 2017
    Assignee: FUJITSU LIMITED
    Inventors: Ryota Kamakari, Takeshi Shimoyama, Hiroshi Tsuda, Yoshinori Yaginuma, Avradip Mandal, Arnab Roy, Hart Montgomery, Toshiyuki Ishiguro, Kouhei Shigeta
  • Publication number: 20170104771
    Abstract: There is provided a network monitoring device including: a memory; and a processor coupled to the memory and the processor configured to: detect, based on history record information on attempts to log into a plurality of information processing devices from a plurality of terminals via a network, occurrences of attempts that were made to log into the plurality of information processing devices with common account information a predetermined number of times or less; and reject an attempt to log into an information processing device among the plurality of information processing devices from a terminal among the plurality of terminals and notify the terminal of a re-attempt to log into the information processing device after the occurrences of attempts are detected.
    Type: Application
    Filed: September 28, 2016
    Publication date: April 13, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Satomi Saito, Satoru Torii, Hiroshi Tsuda
  • Publication number: 20170085382
    Abstract: A method includes receiving biometric data, the biometric data non-uniformly distributed and processing the biometric data to a level of randomness as a plaintext vector, the level of randomness associated with a security level. The method also includes encrypting the plaintext vector using a relational linearity encryption scheme to generate a linearity ciphertext representative of the plaintext vector, encrypting the plaintext vector using a relational proximity encryption scheme to generate a proximity ciphertext representative of the plaintext vector, and communicating the linearity ciphertext and the proximity ciphertext to an authentication server.
    Type: Application
    Filed: February 10, 2016
    Publication date: March 23, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Ryota KAMAKARI, Takeshi SHIMOYAMA, Hiroshi TSUDA, Yoshinori YAGINUMA, Avradip MANDAL, Arnab ROY, Hart MONTGOMERY, Toshiyuki ISHIGURO, Kouhei SHIGETA
  • Publication number: 20170019255
    Abstract: A method of equality verification using relational encryption including receiving a relational key that includes a first relational key component and a registration ciphertext that includes an encryption of a first plaintext data set. The method includes storing the registration ciphertext without decrypting the registration ciphertext. After the storing of the registration ciphertext, the method includes receiving an authentication request and communicating a safeguard data set that includes a random challenge in response to the authentication request. The method includes receiving an encrypted response that is generated based on the safeguard data set and a second plaintext data set. The method includes verifying a relationship between the encrypted response and the registration ciphertext using the relational key without decrypting the encrypted response and without decrypting the registration ciphertext. The relationship indicates that equality exists between the first and the second plaintext data sets.
    Type: Application
    Filed: February 10, 2016
    Publication date: January 19, 2017
    Applicant: FUJITSU LIMITED
    Inventors: Ryota KAMAKARI, Takeshi SHIMOYAMA, Hiroshi TSUDA, Yoshinori YAGINUMA, Avradip MANDAL, Arnab ROY, Hart MONTGOMERY, Toshiyuki ISHIGURO, Kouhei SHIGETA
  • Publication number: 20160283719
    Abstract: According to an aspect of the embodiments, a method for evaluation of selection for an edited field, including: displaying information having one or more fields having undergone an editing process among multiple fields including a subject and/or a body, and a sender; accepting selection for one or more fields among the multiple fields; and outputting a result of evaluation representing a state of matching the selected fields with the fields having undergone the editing process. This makes it possible to evaluate whether the user correctly selects a field having undergone the editing process.
    Type: Application
    Filed: February 26, 2016
    Publication date: September 29, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Takeaki Terada, Hiroshi Tsuda, Yoshinori Katayama
  • Publication number: 20160212124
    Abstract: A terminal determination device includes a processor that executes a procedure. The procedure includes acquiring operation information indicating history of operation that has taken place on a terminal, and, according to whether or not the acquired operation information belongs in a particular range of similarity with operation information stored associated with a specific terminal, determining whether or not the terminal is the specific terminal.
    Type: Application
    Filed: December 22, 2015
    Publication date: July 21, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Yoshinori Katayama, Hiroshi Tsuda
  • Publication number: 20160205119
    Abstract: A user determination device includes a processor that executes a procedure. The procedure includes causing a simulated abnormality to occur on a terminal, acquiring operation information indicating an evasion operation of a user in response to the simulated abnormality that occurred on the terminal, and determining whether or not the user is a specific user according to whether or not the acquired operation information belongs in a particular range of similarity with operation information stored associated with the specific user.
    Type: Application
    Filed: December 21, 2015
    Publication date: July 14, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Yoshinori Katayama, Hiroshi Tsuda
  • Publication number: 20160191553
    Abstract: An alert transmission method is disclosed. Behavior logs of multiple users are collected from multiple terminals. A computer groups users having a high similarity to each other based on the behavior logs. An alert is transmitted to other users belonging to a group of a user indicated by a report of a cyber attack, when receiving the report from a terminal of the user.
    Type: Application
    Filed: December 21, 2015
    Publication date: June 30, 2016
    Applicant: FUJITSU LIMITED
    Inventors: Mebae Ushida, Yoshinori Katayama, Takeaki Terada, Hiroshi Tsuda
  • Publication number: 20160161249
    Abstract: In the present invention, conventional problems that the scheme is not suitable for nano/micro materials or large structures, and that if the scheme is applied to a regular pattern with two or more cycles of arbitrary repetition, a large error is generated are solved by using a higher order frequency of moire fringes generated using an arbitrary regular pattern having one-dimensional or two-dimensional repetition artificially produced on a surface of an object or previously present on the surface of the object, or phase information in a plurality of frequency components, and improvement of measurement precision and a dramatic increase in a limit of a measurement scale are achieved.
    Type: Application
    Filed: December 5, 2013
    Publication date: June 9, 2016
    Applicant: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventors: Shien RI, Hiroshi TSUDA
  • Patent number: 9146095
    Abstract: A vibration detection apparatus for, for example, ultrasound/AE, with Fiber Bragg Grating (FBG), is used for elastic wave detection generated by a material impact and ultrasonic defect detection. Disadvantageously, the apparatus cannot detect ultrasound and has degraded performance at variable temperatures and strains. In response, a highly sensitive, small and light vibration detection apparatus is provided. FBG reflection light is lased by using a fiber laser. The intensity of the lased reflection light from the FBG is converted into an electrical signal. Thus, the ultrasound vibration or the like is detected. A vibration detection system includes an optical amplifier 42, an optical circulator 43, and an optical coupler 45. An FBG 44 and an entry/exit port of the optical circulator are connected by an optical fiber. The optical coupler and the optical amplifier are inserted between an entry port and an exit port of the optical circulator. The entry port and the exit port are connected by an optical fiber.
    Type: Grant
    Filed: March 17, 2011
    Date of Patent: September 29, 2015
    Assignee: NATIONAL INSTITUTE OF ADVANCED INDUSTRIAL SCIENCE AND TECHNOLOGY
    Inventor: Hiroshi Tsuda
  • Publication number: 20150264085
    Abstract: A message sending device includes a processor that executes a process. The process includes: obtaining an operation characteristic during creating a message; adding, to the message, the operation characteristic obtained at the obtaining; and sending the message, to which the operation characteristic has been added at the adding, to a destination of the message.
    Type: Application
    Filed: February 5, 2015
    Publication date: September 17, 2015
    Applicant: Fujitsu Limited
    Inventors: Yoshinori KATAYAMA, Hiroshi TSUDA