Smartcard encryption cycling
First Claim
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 (ECM) using a first encryption scheme, whereinthe 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 ECM encrypted using a second encryption scheme while the first ECM of the first television channel of the plurality of television channels is protected using the first encryption scheme, whereinthe first ECM encrypted using the first encryption scheme requires more processing to decrypt than the second ECM encrypted using the second encryption scheme;
cause the first ECM encrypted using the first encryption scheme and a second ECM encrypted using the second encryption scheme to be transmitted to a plurality of television receivers, wherein;
data from the first ECM is used for descrambling of the first television channel by the plurality of television receivers, anddata from the second ECM is used for descrambling of the second television channel by the plurality of television receivers; and
periodically rotate selection of a television channel from the plurality of television channels of the single transponder stream for encryption of the selected television channel'"'"'s ECM using the first encryption scheme, wherein;
ECMs for each television channel of the plurality of television channels are periodically encrypted with the first encryption scheme and, at other times, encrypted using the second encryption scheme; and
at a given time, an ECM for only one channel of the plurality of television channels transmitted using the single transponder stream is encrypted using the first encryption scheme and ECMs for each other television channel of the plurality of television channels of the single transponder scheme are encrypted using the second encryption scheme.
4 Assignments
0 Petitions
Accused Products
Abstract
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.
-
Citations
11 Claims
-
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 (ECM) 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 ECM encrypted using a second encryption scheme while the first ECM of the first television channel of the plurality of television channels is protected using the first encryption scheme, wherein the first ECM encrypted using the first encryption scheme requires more processing to decrypt than the second ECM encrypted using the second encryption scheme; cause the first ECM encrypted using the first encryption scheme and a second ECM encrypted using the second encryption scheme to be transmitted to a plurality of television receivers, wherein; data from the first ECM is used for descrambling of the first television channel by the plurality of television receivers, and data from the second ECM is used for descrambling of the second television channel by the plurality of television receivers; and periodically rotate selection of a television channel from the plurality of television channels of the single transponder stream for encryption of the selected television channel'"'"'s ECM using the first encryption scheme, wherein; ECMs for each television channel of the plurality of television channels are periodically encrypted with the first encryption scheme and, at other times, encrypted using the second encryption scheme; and at a given time, an ECM for only one channel of the plurality of television channels transmitted using the single transponder stream is encrypted using the first encryption scheme and ECMs for each other television channel of the plurality of television channels of the single transponder scheme are encrypted using the second encryption scheme. - View Dependent Claims (2, 3, 4, 5)
-
-
6. 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 (ECM) 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 ECM encrypted using a second encryption scheme while the first ECM of the first television channel of the plurality of television channels is protected using the first encryption scheme; 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 rotating, by the television service provider system, selection of a television channel from the plurality of television channels of the single transponder stream for encryption of the selected television channel'"'"'s ECM using the first encryption scheme, wherein; ECMs for each television channel of the plurality of television channels are periodically encrypted with the first encryption scheme and, at other times, encrypted using the second encryption scheme; and at a given time, an ECM for only one channel of the plurality of television channels transmitted using the single transponder stream is encrypted using the first encryption scheme and ECMs for each other television channel of the plurality of television channels of the single transponder scheme are encrypted using the second encryption scheme. - View Dependent Claims (7, 8, 9)
-
-
10. 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 (ECM) 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 (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, wherein the first (ECM) encrypted using the first encryption scheme requires more processing to decrypt than the second (ECM) encrypted using the second encryption scheme; cause the first (ECM) encrypted using the first encryption scheme and a second (ECM) encrypted using the second encryption scheme to be transmitted to a plurality of television receivers, wherein; data from the first (ECM) is used for descrambling of the first television channel by the plurality of television receivers, and data from the second (ECM) is used for descrambling of the second television channel by the plurality of television receivers; and periodically rotate selection of a television channel from the plurality of television channels of the single transponder stream for encryption of the selected television channel'"'"'s ECM using the first encryption scheme, wherein; ECMs for each television channel of the plurality of television channels are periodically encrypted with the first encryption scheme and, at other times, encrypted using the second encryption scheme; and at a given time, an ECM for only one channel of the plurality of television channels transmitted using the single transponder stream is encrypted using the first encryption scheme and ECMs for each other television channel of the plurality of television channels of the single transponder scheme are encrypted using the second encryption scheme. - View Dependent Claims (11)
-
Specification