Patent ID: 9356718
Filing Date: 2016-05-31
CPC Classification: H04H,H04L

Claim Text:
1. A method for receiving a broadcast service by a terminal in a broadcast system, the method comprising: performing, by the terminal, a registration procedure for subscription and reception of the broadcast service through a Browser And Content Mobile Broadcast (BCAST) Subscription Management (BSM) responsible for managing subscription information; receiving, by the terminal, a Long Term Key Message (LTKM), including key information for encryption or authentication of the broadcast service, generated from the BSM; receiving a completed Short Term Key Message (STKM) generated by using a first partially created STKM including a Traffic Encryption Key (TEK) but not including a Message Authentication Code (MAC), the first partially created STKM being provided by a Broadcast Service Distribution/Adaptation (BSD/A) which is responsible for transmitting the broadcast service; receiving, by the terminal, from the (BSD/A), an encrypted broadcast service which is encrypted by the TEK for deciphering the broadcast service; and deciphering, by the terminal, the encrypted broadcast service by the TEK obtained using the LTKM and the completed STKM, wherein the first partially created STKM including the TEK is provided from the BSD/A to the BSM, wherein a second partially created STKM is generated from the BSM by encrypting the TEK included in the first partially created STKM, and wherein the completed STKM is generated from the BSM by MAC processing on the second partially created STKM including the encrypted TEK.