Patent ID: 7463737

Claim:
A computer-implemented method of simulcasting multimedia content to enable seamless migration from a first multimedia receiver to a second multimedia receiver, the second multimedia receiver supporting at least one encryption algorithm not supported by the first multimedia receiver, the method comprising: encrypting a group of original multimedia channel keys using a first encryption algorithm decryptable by the first multimedia receiver to produce a first group of encrypted multimedia channel keys; encrypting said same group of original multimedia channel keys using a second encryption algorithm decryptable by the second multimedia receiver to produce a second group of encrypted multimedia channel keys, the second encryption algorithm being developed after the first encryption algorithm, and the second multimedia receiver being developed after the first multimedia receiver; and concurrently transmitting said first group of encrypted multimedia channel keys with said second group of encrypted multimedia channel keys to a plurality of multimedia subscribers having either the first multimedia receiver or the second multimedia receiver, wherein said first group of encrypted multimedia channel keys is decryptable by the first multimedia receiver and said second group of encrypted multimedia channel keys is decryptable by the second multimedia receiver but not the first multimedia receiver.