| US 7,457,414 B1 | ||
| Super encrypted storage and retrieval of media programs with smartcard generated keys | ||
| Raynold M. Kahn, Los Angeles, Calif. (US); Gregory J. Gagnon, Torrance, Calif. (US); David D. Ha, San Gabriel, Calif. (US); Peter M. Klauss, Torrance, Calif. (US); Christopher P. Curren, Brentwood, Calif. (US); and Thomas H. James, Pacific Palisades, Calif. (US) | ||
| Assigned to The DIRECTV Group, Inc., El Segundo, Calif. (US) | ||
| Filed on Jul. 21, 2000, as Appl. No. 9/620,772. | ||
| Int. Cl. H04N 7/167 (2006.01) | ||
| U.S. Cl. 380—201 [705/9; 705/20] | 34 Claims |
| 1. A method of storing program material in a media storage device communicatively coupled to a receiver for subsequent replay,
comprising the steps of:
(a) accepting a data stream including data packets with program material encrypted according to a first encryption key and
access control information which is contained within one or more control word packets that include an encrypted version of
the first encryption key in the receiver;
(b) decrypting the received access control information in a conditional access module which is releasably communicatively
coupled with the receiver to produce the first encryption key;
(c) decrypting the program material in the receiver using the first encryption key;
(d) re-encrypting the program material according to a second encrypting key;
(e) encrypting the second encryption key in the conditional access module according to a third encryption key to produce a
fourth encryption key; and
(f) providing the re-encrypted program material and the fourth encryption key for storage eternal to the conditional access
module.
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