Abstract:
A first terminal subscribes to at least one service using a service guide in which information necessary for reception of each service is stored, and sends the service guide and an identifier (ID) of the subscribed service to a smartcard. The smartcard stores the service guide and the ID of the subscribed service, and sends the service guide and the ID of the subscribed service to a second terminal through a response message to a request message used for acquiring TBK information, received from the second terminal. The second terminal receives the response message by sending the request message to the smartcard, acquires TBK information corresponding to a service that the second terminal intends to play back, from the service guide depending on the subscribed service's ID included in the response message, and acquires the TBK by performing an authentication process using the TBK information.
Abstract:
Provided is a method for delivering all or part of a rights object (RO) of a user associated with the content to other users. The method includes creating a rights object to be transmitted to a second user within a limit of the rights object held by the first user, and forwarding the created rights object to the second user. The method allows each user to share its own RO with other users within the limit of the RO without server authentication.
Abstract:
The present invention relates to a method and system for providing a digital content service that provides packaging content consisting of digital rights management (DRM) content and advertisement content, and is able to use the DRM content for free by watching or listening to the advertisement content, including: generating packaging content consisting of pilot content and target content, which has been encrypted using an encryption key of the pilot content, and providing the packaging content to a portable terminal; and obtaining a decryption key for the target content through playing the pilot content of the packaging content, and playing the target content by the decryption key, by the portable terminal.
Abstract:
A method and system for registration with a broadcast server is provided. A request from a smartcard terminal for registration is received and the smartcard terminal is authenticated based on the request. Further, A specific key material, Ks_NAF, is generated in response to the request. At least one of registering the smartcard terminal with the Internet Protocol (IP) multimedia subsystem (IMS) server and with the broadcast server simultaneously, and registering the smartcard terminal with the IMS server and subsequently with the broadcast server through the IMS server, is performed. At least one of notifying the IMS server of status of the registration by the broadcast server, and notifying the broadcast server of the status of the registration by the IMS server, is performed. The system includes a smartcard terminal for sending a request for registration, a key generator for generating a Ks_NAF, and an IMS server and a broadcast server for authentication and security association establishment with the smartcard terminal using the Ks_NAF.
Abstract:
A method for receiving a broadcast service through a plurality of terminals in a mobile broadcasting system supporting the broadcast service is provided. The method includes sending a registration request message for requesting registration of each of a plurality of terminals from a server associated with a broadcast service, receiving a registration response message from the server in response to each registration request message, sending a service request message to the server through one terminal of the plurality of terminals to request that the broadcast service be provided to the remaining terminals, and receiving, by the remaining terminals, a service response message from the server and the broadcast service.
Abstract:
A method of authenticating a content provider and assuring content integrity by which the content provider is authenticated and the content integrity is assured upon download, exchange or transfer of a variety of multimedia contents through a wired/wireless communication network. The method of authenticating the content provider and assuring the content integrity, including downloading packaged contents with an electronic signature made thereto into a device of a user through a wired/wireless communication network, finding a URL address from which a certificate for verification of a signature of the content provider is provided, in a header of the contents, acquiring the certificate of the content provider after moving to the URL address, extracting a public key required for the verification of the electronic signature from the acquired certificate, and verifying the electronic signature by using the extracted public key.
Abstract:
A method and system is provided for sharing a service guide or a service guide fragment in a mobile broadcast system supporting a mobile broadcast service. A Broadcast Service Provisioning Client Function (BSP-C) sends a request for the service guide or service guide fragment to a Broadcast Service Provisioning Management Function (BSP-M). The BSP-M transmits the service guide or service guide fragment to the BSP-C if the BSP-M has the service guide or service guide fragment.
Abstract:
A system and method for transmitting/receiving encryption information in a mobile broadcast system supporting broadcast service (BCAST) are provided. In the mobile broadcast system, a BCAST Subscription Management (BSM) manages subscriber information of a terminal, and transmits to a BCAST Service Distribution/Adaptation (BSD/A) a first delivery message including a Registration Key Material (RKM) provided for registration of the broadcast service of the terminal and including at least one service or content's identifier. The BSD/A transmits to the BSM a first delivery confirmation message including information indicating success/fail in receipt of the first delivery message, and transmits the RKM to the terminal.
Abstract:
Disclosed is an inter-entity coupling method for service protection in a broadcast environment including a terminal and a broadcast network, which includes a Broadcast Service Application (BSA), a Broadcast Service Distribution (BSD) and a Broadcast Service Management (BSM) function. The method includes executing enrollment and service joining procedures for the terminal, wherein the terminal acquires a group key in the enrollment procedure and acquires a Rights Object (RO) for the service in the service joining procedure; receiving a message including a traffic key in the terminal; acquiring the traffic key from the message using the RO; receiving an encrypted service encrypted by the BSD in the terminal; and decrypting the encrypted service using the traffic key in the terminal.
Abstract:
Disclosed are a method, a system and a terminal apparatus for reproducing content purchased by a user in a plurality of terminals. To this end, a Right Object (RO) is received through an authentication process for content and a service registration process, and is stored in a User Identity Module (UIM). If the UIM is used, a user can use corresponding content in a plurality of terminals through one-time registration. Accordingly, the user having completed the registration can reproduce content in multiple terminals owned by the user based on user identification by means of a license acquired through the registration regardless of a specific terminal, instead of reproducing the content only in a single terminal to which a license has been bound.