INTER-ENTITY COUPLING METHOD, APPARATUS AND SYSTEM THEREOF FOR SERVICE PROTECTION

摘要

PROBLEM TO BE SOLVED: To provide 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).

SOLUTION: The method includes: executing enrollment and service joining procedures for a terminal 50 in a BSM 40; acquiring a group key in the enrollment procedure and acquiring a rights object for the service in the service joining procedure in the terminal 50; receiving a message including a traffic key in the terminal 50; acquiring the traffic key from the message using the rights object in the terminal 50; receiving an encrypted service encrypted by a BSD 30 from the BSD 30 in the terminal 50; and decrypting the encrypted service using the traffic key in the terminal 50.

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