Patents by Inventor Michael Selhorn

Michael Selhorn 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).

  • Systems, structures, and methods for decrypting encrypted digital content when a rights management server has been decommissioned
    Patent number: 7570768
    Abstract: A method is disclosed for rendering content encrypted according to a cryptographic key, where the content has corresponding rights data including a decryption key (KD) for decrypting the encrypted content, and where (KD) in the rights data is encrypted according to a public key of a rights management (RM) server (PU-RM) to result in (PU-RM(KD)). The RM server normally delivers (KD) within a license, but upon being decommissioned can no longer issue such license. In the method, a notification is received that the RM server has been decommissioned, and thereafter an attempt is made to render a piece of content. Such content is determined to be protected to the decommissioned RM server, and a request is sent to the decommissioned RM server for the content key (KD) for the content rather than any license. Thereafter (KD) is received from the decommissioned RM server.
    Type: Grant
    Filed: August 1, 2003
    Date of Patent: August 4, 2009
    Assignee: Microsoft Corporation
    Inventors: Jason Cahill, Pavel Kouznetsov, Kevin Brown, Lauren Antonoff, Marco DeMello, Peter David Waxman, Scott Cottrille, Michael Selhorn
  • Organization-based content rights management and systems, structures, and methods therefor
    Publication number: 20050021987
    Abstract: A method is disclosed for rendering content encrypted according to a cryptographic key, where the content has corresponding rights data including a decryption key (KD) for decrypting the encrypted content, and where (KD) in the rights data is encrypted according to a public key of a rights management (RM) server (PU-RM) to result in (PU-RM(KD)). The RM server normally delivers (KD) within a license, but upon being decommissioned can no longer issue such license. In the method, a notification is received that the RM server has been decommissioned, and thereafter an attempt is made to render a piece of content. Such content is determined to be protected to the decommissioned RM server, and a request is sent to the decommissioned RM server for the content key (KD) for the content rather than any license. Thereafter (KD) is received from the decommissioned RM server.
    Type: Application
    Filed: August 1, 2003
    Publication date: January 27, 2005
    Inventors: Jason Cahill, Pavel Kouznetsov, Kevin Brown, Lauren Antonoff, Marco DeMello, Peter Waxman, Scott Cottrille, Michael Selhorn