Method and system for protecting broadcast service/content in a mobile broadcast system, and method for generating short term key message therefor
First Claim
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, andwherein the completed STKM is generated from the BSM by MAC processing on the second partially created STKM including the encrypted TEK.
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Abstract
A terminal and method for receiving a broadcast service by the terminal in a broadcast system are provided. The method includes performing a registration procedure for subscription and reception of the broadcast service through a Browser And Content Mobile Broadcast (BSCAST) Subscription Management (BSM) responsible for managing subscription information; receiving a Long Term Key Message (LTKM), including key information for encryption of the broadcast service, generated from the BSM; receiving a completed Short Term Key Message (STKM), the completed STKM being generated by performing Message Authentication Code (MAC) processing on a partially created STKM; receiving, from a Broadcast Service Distribution/Adaptation (BSD/A) which is responsible for transmitting the broadcast service, an encrypted broadcast service which is encrypted by a Traffic Encryption Key (TEK) for deciphering the broadcast service; and deciphering the encrypted broadcast service by the TEK obtained using the LTKM and the completed STKM.
41 Citations
10 Claims
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1. A method for receiving a broadcast service by a terminal in a broadcast system, the method comprising:
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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. - View Dependent Claims (2, 3, 4, 5)
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6. A terminal for receiving a broadcast service in a broadcast system, the terminal comprising:
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a receiver for receiving messages for subscription and reception of the broadcast service and the broadcast service from the broadcast system; and a controller for 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, controlling operations of 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 that is encrypted by a TEK for deciphering, by the terminal, the broadcast service, and deciphering 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. - View Dependent Claims (7, 8, 9, 10)
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Specification