Patents by Inventor Tomoo Fukazawa

Tomoo Fukazawa 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).

  • Authentication information generating system, authentication information generating method, client apparatus, and authentication information generating program for implementing the method
    Patent number: 8953805
    Abstract: A secret information server 300 on a network 10 and a client apparatus 100 constitute an authentication information generating system. The secret information server 300 has a function to confirm the validity of a user in accordance with user identification information received from the client apparatus 100 and a function to hold the secret information database of each user and to send the secret information database of a user whose validity has been confirmed to the client apparatus 100 of the user. The client apparatus 100 has a main memory 120 having a domain A where an application or a main OS is executed and a domain B which has a program execution environment mutually independent of that for the domain A. The secret information database received from the secret information server 300 is saved in the domain B, and authentication information is generated by using the secret information database.
    Type: Grant
    Filed: March 3, 2009
    Date of Patent: February 10, 2015
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Yukio Tsuruoka, Yoshinao Kikuchi, Tomoo Fukazawa
  • AUTHENTICATION INFORMATION GENERATING SYSTEM, AUTHENTICATION INFORMATION GENERATING METHOD, CLIENT APPARATUS, AND AUTHENTICATION INFORMATION GENERATING PROGRAM FOR IMPLEMENTING THE METHOD
    Publication number: 20110069839
    Abstract: A secret information server 300 on a network 10 and a client apparatus 100 constitute an authentication information generating system. The secret information server 300 has a function to confirm the validity of a user in accordance with user identification information received from the client apparatus 100 and a function to hold the secret information database of each user and to send the secret information database of a user whose validity has been confirmed to the client apparatus 100 of the user. The client apparatus 100 has a main memory 120 having a domain A where an application or a main OS is executed and a domain B which has a program execution environment mutually independent of that for the domain A. The secret information database received from the secret information server 300 is saved in the domain B, and authentication information is generated by using the secret information database.
    Type: Application
    Filed: March 3, 2009
    Publication date: March 24, 2011
    Applicant: Nippon Telegraph and Telephone Corporation
    Inventors: Yukio Tsuruoka, Yoshinao Kikuchi, Tomoo Fukazawa
  • Apparatus and method for modifying microprocessor system at random and maintaining equivalent functionality in spite of modification, and the same microprocessor system
    Patent number: 6526511
    Abstract: The present invention discloses a method for randomizing a microprocessor system, such as an IC card, in order to prevent the microprocessor system from being tampered with. The method ensures that the randomized microprocessor system realizes a functionality equivalent to that of an original microprocessor system and enables easy modification of a configuration of the microprocessor system. In the context of this disclosure, to randomize a microprocessor system means to randomize a microprocessor and a program included in the microprocessor system while maintaining an equivalence of functionality realized by the microprocessor system regardless of this randomization.
    Type: Grant
    Filed: December 23, 1998
    Date of Patent: February 25, 2003
    Assignee: Nippon Telegraph and Telephone Corporation
    Inventors: Masami Urano, Tomoo Fukazawa, Ken Takeya