A Study of Superdistribution Model for Family Domain in DRM System

The traditional superdistribution model supports the contents distribution only between users. In this paper, we are presenting the enhanced superdistribution model in order to support the fair use of contents as including the content distribution within family domain as well. Family domain consists of user owned devices. In addition that we propose the license model, using information of distribution history for the secure management of the enhanced superdistribution. The history information is composed of device identifiers. The use of history information makes the contents used only in granted superdistribution and family domain. The history information is protected with asymmetric encryption method to prevent from privacy information leakage. The enhanced superdistribution model and the proposed license model are applicable for the various types of fair use for user and those models enable providers to develop new business models.