Patents Represented by Attorney Woodchuck Washburn LLP
  • Patent number: 7308573
    Abstract: A Digital Rights Management (DRM) system has a plurality of DRM servers performing DRM functionality and an entering DRM-E server is enrolled into the system by an enrolling DRM-R server such that the entering DRM-E server is to be trusted within the system. The DRM-E server sends an enrollment request to the DRM-R server including a proffering identification and a public key (PU-E). The DRM-R server validates the proffering identification, and, if the request is to be honored, generates a digital enrollment certificate with (PU-E) for the DRM-E server to enroll such DRM-E server into the DRM system. The now-enrolled DRM-E server with the generated enrollment certificate is able to employ same to issue DRM documents within the DRM system.
    Type: Grant
    Filed: February 25, 2003
    Date of Patent: December 11, 2007
    Assignee: Microsoft Corporation
    Inventors: Gregory Kostal, Steve Bourne, Vinay Krishnaswamy