Patents by Inventor Shigeo Hirabayashi

Shigeo Hirabayashi 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).

  • IC card and microprocessor
    Patent number: 6907526
    Abstract: Disclosed herein are an IC card and a microcomputer which have implemented the strengthening of security and the speeding up and enhancement of signal processing for the security. In an IC card, which is supplied with an operating voltage by an electrical connection between each of external terminals and a read/write device, and includes an input-output operation of data with an encoding process or a decoding process, a disturbance-aimed processing operation is included in the encoding process or decoding process to uniformalize timings provided to operate an internal circuit and its operating current. In a microcomputer having a module configuration including an input-output operation of data with an encoding process or a decoding process, a disturbance-aimed processing operation is included in the encoding process or decoding process to uniformalize timings provided to operate an internal circuit and its operating current.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: June 14, 2005
    Assignees: Renesas Technology Corp., Hitachi ULSI Systems Co., Ltd.
    Inventors: Chiaki Tanimoto, Kunihiko Nakada, Takashi Tsukamoto, Shigeo Hirabayashi, Hiroshi Watase, Masatoshi Takahashi, Yuuichirou Nariyoshi
  • IC card and microprocessor
    Publication number: 20010047480
    Abstract: Disclosed herein are an IC card and a microcomputer which have implemented the strengthening of security and the speeding up and enhancement of signal processing for the security. In an IC card, which is supplied with an operating voltage by an electrical connection between each of external terminals and a read/write device, and includes an input-output operation of data with an encoding process or a decoding process, a disturbance-aimed processing operation is included in the encoding process or decoding process to uniformalize timings provided to operate an internal circuit and its operating current. In a microcomputer having a module configuration including an input-output operation of data with an encoding process or a decoding process, a disturbance-aimed processing operation is included in the encoding process or decoding process to uniformalize timings provided to operate an internal circuit and its operating current.
    Type: Application
    Filed: January 5, 2001
    Publication date: November 29, 2001
    Inventors: Chiaki Tanimoto, Kunihiko Nakada, Takashi Tsukamoto, Shigeo Hirabayashi, Hiroshi Watase, Masatoshi Takahashi, Yuuichirou Nariyoshi
  • IC card and microprocessor
    Publication number: 20010016910
    Abstract: Disclosed herein are an IC card and a microcomputer which have implemented the strengthening of security and the speeding up and enhancement of signal processing for the security. In an IC card, which is supplied with an operating voltage by an electrical connection between each of external terminals and a read/write device, and includes an input-output operation of data with an encoding process or a decoding process, a disturbance-aimed processing operation is included in the encoding process or decoding process to uniformalize timings provided to operate an internal circuit and its operating current. In a microcomputer having a module configuration including an input-output operation of data with an encoding process or a decoding process, a disturbance-aimed processing operation is included in the encoding process or decoding process to uniformalize timings provided to operate an internal circuit and its operating current.
    Type: Application
    Filed: January 5, 2001
    Publication date: August 23, 2001
    Inventors: Chiaki Tanimoto, Kunihiko Nakada, Takashi Tsukamoto, Shigeo Hirabayashi, Hiroshi Watase, Masatoshi Takahashi, Yuuichirou Nariyoshi