New pending patent applications are published on Thursdays. Both of this week's Spotlight Applications concern aspects of digital rights management. Assigned to [VMWare] AirWatch, the first application addresses techniques for applying rights management policies to protected files. Assigned to Microsoft, the second patent addresses techniques for using multiple content protection systems in a file.
20170124342, "Applying rights management policies to protected files," assigned to [VMWare] AirWatch, LLC
Examples of the present disclosure relate to protecting tiles with an information rights policy. Files can be protected as specified by a content policy associated with the file. The content policy can specify whether the file should be protected while at rest on a device as well as when the file is shared with another user of an enterprise.
20170124295, "Multiple content protection systems in a file," assigned to Microsoft.
Supporting a plurality of content protection systems in a single container file. The protection systems share an encryption method which is accessible from a sample encryption box in the file. Each of the protection systems stores, in a protection system header box, information for decrypting the content in accordance with the corresponding protection system. In some embodiments, separate protection system header boxes in the file correspond to each of the protection systems. By using the common encryption method and sharing encryption expressions across the protection systems, the multiple content protection systems are supported in the file without creating additional copies of the content. In some embodiments, aspects of the disclosure extend the International Organization for Standardization (ISO) base media file format to support multiple digital rights management (DRM) systems in the single container file.