SMARTCARD ENCRYPTION CYCLING

摘要

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.

主权项

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; andcause 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, anddata from the second entitlement control message is used for descrambling of the second television channel by the plurality of television receivers.