Patents by Inventor Hirokazu Ougi

Hirokazu Ougi 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).

  • Cryptographic communication method, encryption algorithm shared control method, encryption algorithm conversion method and network communication system
    Patent number: 7110548
    Abstract: An operating encryption algorithm is converted to another encryption algorithm. When different encryption algorithms are operated by a personal computer 100 for use by a group A and a personal computer 200 for use by group B, an encryption algorithm, operated by the personal computer 100 is encrypted by the personal computer 100 with the encryption algorithm operated by the personal computer 200 and transmitted to the personal computer 200.
    Type: Grant
    Filed: August 2, 1999
    Date of Patent: September 19, 2006
    Assignees: Hatachi Ltd, Hatachi Advanced Systems Corp, Hatachi Keiyo Engineering Co, Ltd
    Inventors: Hirokazu Ougi, Hideo Takashima, Hidenobu Taniguchi, Munetoshi Kouchi, Hiroshi Hayami, Hajime Asada, Hideki Harazaki
  • Cryptographic communication method, encryption algorithm shared control method, encryption algorithm conversion method and network communication system
    Publication number: 20040260950
    Abstract: An operating encryption algorithm is converted to another encryption algorithm. When different encryption algorithms are operated by a personal computer 100 for use by a group A and a personal computer 200 for use by group B, an encryption algorithm, operated by the personal computer 100 is encrypted by the personal computer 100 with the encryption algorithm operated by the personal computer 200 and transmitted to the personal computer 200.
    Type: Application
    Filed: March 29, 2004
    Publication date: December 23, 2004
    Inventors: Hirokazu Ougi, Hideo Takashima, Hidenobu Taniguchi, Munetoshi Kouchi, Hiroshi Hayami, Hajime Asada, Hideki Harazaki