7,382,879, "Digital rights management negotiation for streaming media over a network," assigned to Sprint.
A digital rights management (DRM) method is negotiated prior to initiating delivery of a DRM encoded content item over a digital network between a client and a target server. The client identifies a link to the target server for accessing the DRM encoded content item. The client initiates a network session with the target server. The client sends an offer message to the target server containing a list of at least one supported DRM method. The target server sends an answer message to the client containing a corresponding list 1) indicating whether each DRM method listed in the offer message is supported by the target server, and 2) providing a network address of a DRM license server for each supported DRM method. The client selects a supported DRM method. The client obtains a DRM license using the network address listed for the selected DRM method. The target server delivers the DRM encoded content item to the client using the selected DRM method.
7,383,586, "File system operation and digital rights management (DRM)," assigned to Microsoft.
File system interaction with digital rights management (DRM) is facilitated by enabling one or more file system components to be DRM-aware. These one or more file system components may be part of a computer operating system. An exemplary system implementation includes: one or more processors; and one or more media in operative communication therewith, the media storing one or more file system components that are configured to provide content having DRM controls to a requesting program in either a raw form or a decrypted form in dependence on whether the DRM controls comprise simple DRM content controls or complex DRM content controls. In another exemplary system implementation, the one or more file system components are configured to provide files with simple DRM content controls to requesting applications in a decrypted form and to provide files with complex DRM content controls to requesting applications in an unaltered form.