Patent ID: 8160252
Filing Date: 2012-04-17
Classification: H04H,H04L

Abstract:
1. A method for generating a Short Term Key Message (STKM) for protection of a broadcast service being broadcasted to a terminal in a broadcast system, the method comprising: generating, by a Broadcast Service Distribution/Adaptation (BSD/A) which is responsible for transmitting the broadcast service to the terminal, a partially created STKM including a Traffic Encryption Key (TEK) before Message Authentication Code (MAC) processing, and transmitting the partially created STKM including the TEK to a Broadcast Service Subscription Management (BSM) which is responsible for managing subscription information; encrypting, by the BSM, the TEK for deciphering of the broadcast service using a Service Encryption Key (SEK) or a Program Encryption Key (PEK); and performing, by the BSM, MAC processing on the partially created STKM including the encrypted TEK, thereby generating a completed STKM.