Patents by Inventor Pratul Dublish

Pratul Dublish 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).

  • Publishing content in connection with digital rights management (DRM) architecture
    Publication number: 20030233561
    Abstract: A packager packages digital content for a user and a licensor issues a digital license to the user for the content such that the user renders the content only in accordance with the license. The licensor and packager share a Secret to allow the packager and the licensor to calculate a content key (KD) for the content. To package the content for the user, the packager calculates a content key (KD) based on the shared Secret and a content ID and encrypts the content according to (KD). To issue a license to the user for the content, the licensor also calculates (KD) based on the shared Secret and the content ID, encrypts (KD) according to a public key of the user to form the license, and sends the license to the user.
    Type: Application
    Filed: June 12, 2002
    Publication date: December 18, 2003
    Applicant: Microsoft Corporation
    Inventors: Krishnamurthy Ganesan, Pratul Dublish, Sandeep Sahasrabudhe, Clifford Paul Strom