Patents by Inventor Takushi Tamura

Takushi Tamura 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).

  • Method of deciphering ciphered data and apparatus for same
    Patent number: 6732271
    Abstract: A method of deciphering ciphered data in which in parallel to a deciphering process for first ciphered data, a first chaining value to be used for deciphering second ciphered data is generated, by using the generated chaining value, a process of deciphering the second ciphered data is executed, and in parallel to a deciphering process for the second ciphered data, a second chaining value to be used for deciphering third ciphered data is generated.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: May 4, 2004
    Assignee: Hitachi, Ltd.
    Inventors: Kazuhiko Sako, Satoshi Oguni, Takushi Tamura, Naoki Hirayama