AUTHORIZED DOMAIN MANAGEMENT WITH ENHANCED FLEXIBILITY

摘要

In Authorized Domains the management of which devices that can access content is a key issue. The Authorized Domain must be limited to a relatively small group of devices to get a solution that is acceptable to both content providers and users. Current solutions are typically either to rigid to be future proof and user friendly or not effective enough in limiting the size of the Authorized Domain. This invention provides a user­friendly, flexible and yet effective method of managing the size of an Authorized Domain. The method proposes to combine a plurality of independent restriction functions, each arranged to limit the size of the Authorized domain. The combination of the restriction functions makes the resultant limit on the size of the Authorized Domain more flexible, in that a limit of one restriction function can be less restrictive if a limit of one or more other restriction functions is/are made more restrictive.