Patent ID: 7486792

Claim:
A method for protecting digital television from unauthorized digital receivers within a population of digital receivers, where each digital receiver in the population has a unique identifier, the method comprising steps of: at a broadcaster: receiving provisioning information from a subset of the population of digital receivers indicating that the subset is potentially within range to receive digital television from the broadcaster, the provisioning information including a unique serial number associated with each digital receiver; distributing first decryption information to the subset of the population of digital receivers, wherein: the first decryption information allows for potentially decrypting a plurality of programs coextensively in time, and the unauthorized digital receivers are cryptographically excluded from using the first decryption information; encrypting first content using a first method using a content encryption key; distributing the first content; encrypting the content encryption key using the first decryption information, the first decryption information being generated using the provisioning information; and distributing the content encryption key to the subset of the population of digital receivers using a second decryption information, wherein the second decryption information is cryptographically secured with the first decryption information.