Patents by Inventor Youdai Watanabe

Youdai Watanabe 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).

  • Quantum key distribution method and communication device
    Patent number: 7609839
    Abstract: In order to create a highly-secured common key while a data error on a transmission path is corrected by an error correction code having remarkably high characteristics, in a quantum key distribution method of the invention, at first a communication apparatus on a reception side corrects the data error of reception data by a deterministic, stable-characteristics parity check matrix for a “Irregular-LDPC code.” The communication apparatus on the reception side and a communication apparatus on a transmission side discard a part of pieces of the common information according to public error correction information.
    Type: Grant
    Filed: September 12, 2003
    Date of Patent: October 27, 2009
    Assignee: Mitsubishi Electric Corporation
    Inventors: Youdai Watanabe, Wataru Matsumoto
  • Quantum key distribution method and communication device
    Publication number: 20060059403
    Abstract: In order to create a highly-secured common key while a data error on a transmission path is corrected by an error correction code having remarkably high characteristics, in a quantum key distribution method of the invention, at first a communication apparatus on a reception side corrects the data error of reception data by a deterministic, stable-characteristics parity check matrix for a “Irregular-LDPC code.” The communication apparatus on the reception side and a communication apparatus on a transmission side discard a part of pieces of the common information according to public error correction information.
    Type: Application
    Filed: September 12, 2003
    Publication date: March 16, 2006
    Inventor: Youdai Watanabe