Patent ID: 8407483

Claim:
A contents personal use authentication apparatus, comprising: a packager configured to depackage contents into a package key, package key information, and an encrypted content; an access controller configured to read domain authentication information from a portable personal use authentication device storing the domain authentication information, and to extract domain information based on the package key information and playback information of a content based on the package key and the domain authentication information and; and a controller configured to receive the encrypted content from the packager and the playback information from the access controller, and send the encrypted content and the playback information to a player, wherein the domain authentication information includes a domain identification (ID) of the content, a domain key of the content, and a device ID of the portable personal use authentication device, and wherein the access controller includes: a domain authentication unit configured to extract the domain ID from the package key information; a safe region accessing unit configured to read in the domain authentication information stored in the portable personal use authentication device; and an authentication device control unit configured to provide the domain key included in the domain authentication information read by the safe region accessing unit to the domain authentication unit when the domain ID extracted in the domain authentication unit is the same as the domain ID included in the domain authentication information read by the safe region accessing unit, wherein the domain authentication unit extracts the playback information from the package key based on the domain key provided from the authentication device control unit.