Smartcard encryption cycling
View Patent ↗Various arrangements for encrypting multiple television channels are presented. A first television channel of a plurality of television channels to be protected via a first entitlement control message (ECM) using a first encryption scheme may be designated. The plurality of television channels may be transmitted using a single transponder stream. A second television channel of the plurality of television channels to be protected via a second ECM encrypted using a second encryption scheme while the first television channel of the plurality of television channels is protected using the first encryption scheme may be designated. The first and second ECMs may be transmitted to a plurality of television receivers. Data from the first ECM may be used for descrambling of the first television channel by the plurality of television receivers. Data from the second ECM may be used for descrambling of the second television channel by the plurality of television receivers.
1. A system for encrypting multiple television channels, the system comprising: one or more processors; and a memory communicatively coupled with and readable by the one or more processors and having stored therein processor-readable instructions which, when executed by the one or more processors, cause the one or more processors to: designate a first television channel of a plurality of television channels to be protected via a first entitlement control message using a first encryption scheme, wherein the plurality of television channels are transmitted using a single transponder stream; designate a second television channel of the plurality of television channels to be protected via a second entitlement control message encrypted using a second encryption scheme while the first television channel of the plurality of television channels is protected using the first encryption scheme; and
cause the first entitlement control message encrypted using the first encryption scheme and a second entitlement control message encrypted using the second encryption scheme to be transmitted to a plurality of television receivers, wherein: data from the first entitlement control message is used for descrambling of the first television channel by the plurality of television receivers, and data from the second entitlement control message is used for descrambling of the second television channel by the plurality of television receivers; wherein the processor-readable instructions, when executed by the one or more processors, cause the one or more processors to:
after the television service provider has transmitted the first entitlement control message and the second entitlement control message: designate the first television channel of the plurality of television channels to be protected via a third entitlement control message encrypted using the second encryption scheme; designate the second television channel of the plurality of television channels to be protected via a fourth entitlement control message encrypted using the first encryption scheme while the first television channel of the plurality of television channels is protected using the second encryption scheme; and cause the third entitlement control message encrypted using the second encryption scheme and the fourth entitlement control message encrypted using the first encryption scheme to be transmitted, wherein: the third entitlement control message is used for decryption of the first television channel, and the fourth entitlement control message is used for decryption of the second television channel.
2. The system for encrypting multiple television channels using multiple encryption schemes of claim 1 , wherein
the first entitlement control message encrypted using the first encryption scheme requires more processing by a television receiver of the plurality of television receivers to decrypt than the second entitlement control message encrypted using the second encryption scheme.
3. The system for encrypting multiple television channels using multiple encryption schemes of claim 1 , wherein the processor-readable instructions, when executed by the one or more processors, cause the one or more processors to:
cause the plurality of channels to be transmitted concurrently to a plurality of television receivers using the single transponder stream, wherein:
data from the first entitlement control message is required to descramble the first television channel; and
data from the second entitlement control message is required to concurrently descramble the second television channel during a time period the first television channel is being descrambled.
4. The system for encrypting multiple television channels using multiple encryption schemes of claim 1 , wherein:
at a given time, only one television channel of the plurality of television channels transmitted concurrently using the single transponder stream is protected using the first encryption scheme.
5. The system for encrypting multiple television channels using multiple encryption schemes of claim 1 , further comprising:
a television receiver comprising a smartcard, the television receiver configured to:
decrypt the first entitlement control message, wherein the television receiver is of the plurality of television receivers;
decrypt the second entitlement control message; and
descramble the first television channel using data from the first entitlement control message; and
descramble the second television channel using data from the second entitlement control message concurrently while descrambling the first television channel using data from the first entitlement control message.
6. The system for encrypting multiple television channels using multiple encryption schemes of claim 5 , wherein:
the television receiver being configured to decrypt the first entitlement control message takes a longer period of time to process than decrypting the second entitlement control message.
7. A method for encrypting multiple television channels, the method comprising: designating, by the television service provider system, a first television channel of a plurality of television channels to be protected via a first entitlement control message using a first encryption scheme, wherein the plurality of television channels are transmitted using a single transponder stream; designating, by the television service provider system, a second television channel of the plurality of television channels to be protected via a second entitlement control message encrypted using a second encryption scheme while the first television channel of the plurality of television channels is protected using the first encryption scheme; and transmitting, by the television service provider system, the first entitlement control message encrypted using the first encryption scheme and a second entitlement control message encrypted using the second encryption scheme to a plurality of television receivers, wherein: data from the first entitlement control message is used for descrambling of the first television channel by the plurality of television receivers, and data from the second entitlement control message is used for descrambling of the second television channel by the plurality of television receivers; and
after the television service provider has transmitted the first entitlement control message and the second entitlement control message: designating, by the television service provider system, the first television channel of the plurality of television channels to be protected via a third entitlement control message encrypted using the second encryption scheme; designating, by the television service provider system, the second television channel of the plurality of television channels to be protected via a fourth entitlement control message encrypted using the first encryption scheme while the first television channel of the plurality of television channels is protected using the second encryption scheme; and transmitting, by the television service provider system, the third entitlement control message encrypted using the second encryption scheme and the fourth entitlement control message encrypted using the first encryption scheme, wherein: the third entitlement control message is used for decryption
of the first television channel, and the fourth entitlement control message is used for decryption of the second television channel.
8. The method for encrypting multiple television channels using multiple encryption schemes of claim 7 , wherein
the first entitlement control message encrypted using the first encryption scheme requires more processing by a television receiver of the plurality of television receivers to decrypt than the second entitlement control message encrypted using the second encryption scheme.
9. The method for encrypting multiple television channels using multiple encryption schemes of claim 7 , further comprising:
transmitting, by the television service provider system, the plurality of channels concurrently to a plurality of television receivers using the single transponder stream, wherein:
data from the first entitlement control message is required to descramble the first television channel; and
data from the second entitlement control message is required to concurrently descramble the second television channel during a time period the first television channel is being descrambled.
10. The method for encrypting multiple television channels using multiple encryption schemes of claim 7 , wherein:
at a given time, only one television channel of the plurality of television channels transmitted concurrently using the single transponder stream is protected using the first encryption scheme.
11. The method for encrypting multiple television channels using multiple encryption schemes of claim 7 , further comprising:
decrypting, by a smartcard of a television receiver, the first entitlement control message, wherein the television receiver is of the plurality of television receivers;
decrypting, by the smartcard of the television receiver, the second entitlement control message; and
descrambling, by the television receiver, the first television channel using data from the first entitlement control message; and
descrambling, by the television receiver, the second television channel using data from the second entitlement control message concurrently while descrambling the first television channel using data from the first entitlement control message.
12. The method for encrypting multiple television channels using multiple encryption schemes of claim 11 , wherein:
decrypting, by the smartcard of the television receiver, the first entitlement control message takes a longer period of time than decrypting the second entitlement control message.
13. A non-transitory processor-readable medium for encrypting multiple television channels, comprising processor-readable instructions configured to cause one or more processors to: designate a first television channel of a plurality of television channels to be protected via a first entitlement control message using a first encryption scheme, wherein the plurality of television channels are transmitted using a single transponder stream; designate a second television channel of the plurality of television channels to be protected via a second entitlement control message encrypted using a second encryption scheme while the first television channel of the plurality of television channels is protected using the first encryption scheme; and cause the first entitlement control message encrypted using the first encryption scheme and a second entitlement control message encrypted using the second encryption scheme to be transmitted to a plurality of television receivers, wherein:
data from the first entitlement control message is used for descrambling of the first television channel by the plurality of television receivers, and data from the second entitlement control message is used for descrambling of the second television channel by the plurality of television receivers; wherein the processor-readable instructions, when executed by the one or more processors, cause the one or more processors to: after the television service provider has transmitted the first entitlement control message and the second entitlement control message: designate the first television channel of the plurality of television channels to be protected via a third entitlement control message encrypted using the second encryption scheme; designate the second television channel of the plurality of television channels to be protected via a fourth entitlement control message encrypted using the first encryption scheme while the first television channel of the plurality of television channels is protected using the second encryption scheme; and cause the third entitlement control message encrypted using the second encryption scheme and the fourth entitlement control message encrypted using the first encryption scheme to be transmitted, wherein: the third entitlement control message is used for decryption of the first television channel, and the fourth entitlement control message is used for decryption of the second television channel.
14. The non-transitory computer-readable medium for encrypting multiple television channels using multiple encryption schemes of claim 13 , wherein
the first entitlement control message encrypted using the first encryption scheme requires more processing by a television receiver of the plurality of television receivers to decrypt than the second entitlement control message encrypted using the second encryption scheme.
15. The non-transitory computer-readable medium for encrypting multiple television channels using multiple encryption schemes of claim 13 , wherein the processor-readable instructions, when executed by the one or more processors, cause the one or more processors to:
cause the plurality of channels to be transmitted concurrently to a plurality of television receivers using the single transponder stream, wherein:
data from the first entitlement control message is required to descramble the first television channel; and
data from the second entitlement control message is required to concurrently descramble the second television channel during a time period the first television channel is being descrambled.
16. The non-transitory computer-readable medium for encrypting multiple television channels using multiple encryption schemes of claim 13 , wherein:
at a given time, only one television channel of the plurality of television channels transmitted concurrently using the single transponder stream is protected using the first encryption scheme.