Patent ID: 7062048

Claim:
A reduced key, multiple authorization system for a content data distribution system distributing content data having a plurality of programs, each transmittable in a plurality of data packets comprising: a receiver having a memory and having a decrypter and having a processor; an authorization indicator stored in said memory and said authorization indicator being transmitted among said data packets, said authorization indicator identifying a plurality of authorized data packets corresponding to at least one authorized program; a number of keys, said keys encrypting said data packets and said keys being transmittable to said receiver and said keys being executable by said decrypter to decrypt said data packets; said processor being in operative communication with said memory and with said decrypter, and said processor outputting decrypted authorized data packets; said number of keys being fewer than said plurality of programs; said authorization indicator further identifying a plurality of unauthorized data packets corresponding to at least one unauthorized program; said processor outputting a plurality of null sets in said unauthorized packets; and a data packet table rebuilder that receives said at least one null sets and rebuilds a data packet table by substituting a new data packet table for each of said at least one null set that formerly contained an original data packet table before being substituted for said at least one null set.