METHOD AND APPARATUS FOR USING AND LIMITING CLUSTER-BASED CONTENTS, METHOD AND APPARATUS FOR AUTHENTICATING ACCESS RIGHT OF CONTENTS, AND COMPUTER READABLE MEDIUM THEREOF

摘要

A method for limiting use of contents based on a cluster and using the contents, a method and a device for authenticating contents access right and a recording medium thereof are provided to define an authentication process between a device requesting stream transmission of contents and a device directly accessing contents, thereby protecting copyright of contents in a home network. A transmission request of contents is received from a sync device(415). A source device authenticates an access right based on a cluster about the contents of the sync device(420). The source device generates an electronic signature of the source device(425). The source device verifies the electronic signature of the sync device through a secret key of the cluster to which the source device belongs. The source device transmits a stream of the contents to the sync device(450).