Patents by Inventor Takashi Matsunaka

Takashi Matsunaka 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).

  • System and Method for mitigating TOC/TOU attacks in a cloud computing enviroment
    Patent number: 9654499
    Abstract: A computer system, method, and computer program product for mitigating TOCTOU attacks, which includes: as processor requesting measurements representing operation of a first process on a host that is untrusted and based on the requesting, obtaining the measurements, which include a checksum that is a result of a second process executing checksum code to verify at least one last branch record on the host. A processor also determined, based on the measurements, whether the first process was compromised.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: May 16, 2017
    Assignee: Vencore Labs, Inc.
    Inventors: Angelo Sapello, Abhrajit Ghosh, Alexander Poylisher, C. Jason Chiang, Ayumu Kubota, Takashi Matsunaka
  • SYSTEM AND METHOD FOR MITIGATING TOC/TOU ATTACKS IN A CLOUD COMPUTING ENVIRONMENT
    Publication number: 20150373046
    Abstract: A computer system, method, and computer program product for mitigating TOCTOU attacks, which includes: as processor requesting measurements representing operation of a first process on a host that is untrusted and based on the requesting, obtaining the measurements, which include a checksum that is a result of a second process executing checksum code to verify at least one last branch record on the host. A processor also determined, based on the measurements, whether the first process was compromised.
    Type: Application
    Filed: June 18, 2015
    Publication date: December 24, 2015
    Inventors: Angelo Sapello, Abhrajit Ghosh, Alexander Poylisher, C. Jason Chiang, Ayumu Kubota, Takashi Matsunaka
  • Key sharing system, communication terminal, management device, key sharing method, and computer program
    Patent number: 8886931
    Abstract: In a case where another user's communication terminal (nTE113) departs from a group, user's communication terminal (TEb14) updates encryption information, using the terminal individual information of only the communication terminals (nTE213 and nTE313) which remain in the group (PNy). User's communication terminal (TEb14) encrypts the PN-shared key (KPNy), using the updated encryption information. User's communication terminal (TEb14) transmits the encrypted shared key information obtained from this encryption to a management device (PNSP11), and updates the encrypted shared key information stored in the management device (PNSP11).
    Type: Grant
    Filed: March 3, 2010
    Date of Patent: November 11, 2014
    Assignee: KDDI Corporation
    Inventors: Takashi Matsunaka, Yoji Kishi, Takayuki Warabino
  • Key Sharing System, Communication Terminal, Management Device, Key Sharing Method, and Computer Program
    Publication number: 20110320815
    Abstract: In a case where another user's communication terminal (nTE113) departs from a group, user's communication terminal (TEb14) updates encryption information, using the terminal individual information of only the communication terminals (nTE213 and nTE313) which remain in the group (PNy). User's communication terminal (TEb14) encrypts the PN-shared key (KPNy), using the updated encryption information. User's communication terminal (TEb14) transmits the encrypted shared key information obtained from this encryption to a management device (PNSP11), and updates the encrypted shared key information stored in the management device (PNSP11).
    Type: Application
    Filed: March 3, 2010
    Publication date: December 29, 2011
    Inventors: Takashi Matsunaka, Yoji Kishi, Takayuki Warabino