PARAMETER-BASED INTERPRETATION OF DRM LICENSE POLICY

摘要

To enforce content access restrictions, a license associated with protected content is generated. This license may have at least one evolving parameter. That is, the parameter value may change; e.g., depending upon content access, copying, etc. For example, each successive generation of a license may have an incremented value in an evolving “generation” parameter. The license may also have evolving rules that describe different content access rules for different values in the evolving parameter