Patents by Inventor Ryoju Hatae

Ryoju Hatae 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).

  • Recording medium, authoring device, and authoring method
    Patent number: 8824683
    Abstract: A recording medium has authoring data recorded thereon. The authoring data has a plurality of formats. Data items common to all the plurality of formats include, a content, a content key for encrypting the content, a hash value of the content, a media key for encrypting the content key, and revocation information for revoking an unauthorized device from using the media key. The plurality of formats include a first format and a second format. In the first format, the content is not encrypted and each of the content key, the hash value, the media key, the revocation information is dummy data. In the second format, the content is encrypted and each of the media key and the revocation information is dummy data.
    Type: Grant
    Filed: April 27, 2006
    Date of Patent: September 2, 2014
    Assignee: Panasonic Corporation
    Inventors: Ryoju Hatae, Yoshihiro Mori, Yasushi Uesaka
  • RECORDING MEDIUM, AUTHORING DEVICE, AND AUTHORING METHOD
    Publication number: 20090041248
    Abstract: A recording medium has authoring data recorded thereon. The authoring data has a plurality of formats. Data items common to all the plurality of formats include, a content, a content key for encrypting the content, a hash value of the content, a media key for encrypting the content key, and revocation information for revoking an unauthorized device from using the media key. The plurality of formats include a first format and a second format. In the first format, the content is not encrypted and each of the content key, the hash value, the media key, the revocation information is dummy data. In the second format, the content is encrypted and each of the media key and the revocation information is dummy data.
    Type: Application
    Filed: April 27, 2006
    Publication date: February 12, 2009
    Inventors: Ryoju Hatae, Yoshihiro Mori, Yasushi Uesaka