Patents by Inventor Kazuya Shimzu

Kazuya Shimzu 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 for generating data for detection of tampering, and method and apparatus for detection of tampering
    Patent number: 8185746
    Abstract: In a target apparatus which stores at least one piece of domain key information in a first area and a plurality of pieces of content key information each associated with any one of the domain key information in a second area, a method for generating data for detecting tampering of the content key information. The method comprises the steps of encrypting the content key information associated with one of the domain key information using a chain encryption technique, extracting data at predetermined positions in the encrypted content key information, concatenating the pieces of data extracted at the predetermined positions in the encrypted content key information to obtain concatenated data, performing a hash calculation with respect to the concatenated data to obtain a hash value, storing check values corresponding to the data at the predetermined positions in plain text, in the target apparatus, and storing the hash value in the target apparatus.
    Type: Grant
    Filed: April 19, 2010
    Date of Patent: May 22, 2012
    Assignee: Panasonic Corporation
    Inventors: Tomoya Satou, Makoto Fujiwara, Kentarou Shiomi, Yusuke Nemoto, Yuishi Torisaki, Kazuya Shimzu, Shinji Inoue, Kazuya Fujimura, Makoto Ochi