David Quang Ha

US Patent:

6853728, Feb 8, 2005

Filed:

Jul 21, 2000

Appl. No.:

09/620832

Inventors:

Raynold M. Kahn - Los Angeles CA, US
Gregory J. Gagnon - Torrance CA, US
David D. Ha - San Gabriel CA, US
Peter M. Klauss - Torrance CA, US
Christopher P. Curren - Brentwood CA, US
Thomas H. James - Pacific Palisades CA, US

Assignee:

The DIRECTV Group, Inc. - El Segundo CA

International Classification:

H04W007/167

US Classification:

380239, 380210, 380201, 725 25, 725 31, 386 94

Abstract:

A system and method for storing and retrieving program material for subsequent replay is disclosed. The method comprises the steps of receiving access control information and the program material encrypted according to a first encryption key, the access control information including the first encryption key and control data; further encrypting the access control information and the encrypted program material according to a second encryption key; encrypting the second encryption key according to a third encryption key to produce a fourth encryption key; and storing the encrypted access control information and encrypted program material and the fourth encryption key.

US Patent:

7000241, Feb 14, 2006

Filed:

Nov 21, 2002

Appl. No.:

10/302416

Inventors:

Peter M. Klauss - Torrance CA, US
Raynold M. Kahn - Los Angeles CA, US
Gregory J. Gagnon - Torrance CA, US
David D. Ha - San Gabriel CA, US

Assignee:

The DirecTV Group, Inc. - El Segundo CA

International Classification:

H04H 1/00
H04Q 7/20

US Classification:

725 25, 455 302, 455 306, 348474

Abstract:

A method and apparatus for receiving conditional access information (CAI) on one or more of a plurality of tuners receiving the CAI from a first tuner of the plurality of tuners is disclosed. The method comprises the steps of determining if the CAI is of a first type that is transmitted by all of a plurality of transponders or of a second type that is transmitted by fewer than all of the plurality of transponders; passing, to a conditional access module, only CAI from the first tuner and rejecting CAI from any other tuner if the CAI is of a type that is transmitted by all transponders; and passing, to the conditional access module, all CAI from any of the plurality of tuners if the CAI is of a type that is transmitted by fewer than all transponders.

US Patent:

7039955, May 2, 2006

Filed:

Sep 14, 2001

Appl. No.:

09/954236

Inventors:

Raynold M. Kahn - Los Angeles CA, US
Gregory J. Gagnon - Torrance CA, US
David D. Ha - San Gabriel CA, US
Dennis R. Flaharty - Irvine CA, US

Assignee:

The DirecTV Group, Inc. - El Segundo CA

International Classification:

G06K 7/01
G06K 5/02
G06K 5/04

US Classification:

726 28, 726 29, 726 30, 380227

Abstract:

An apparatus and method for transmission security is presented. A receiver communicatively coupleable to an identifiable conditional access module (CAM) to enable reception of the service uses an authenticator to control the operability of the receiver according to a comparison between the identified conditional access module and a list of conditional access modules.

US Patent:

7203311, Apr 10, 2007

Filed:

Jul 21, 2000

Appl. No.:

09/621476

Inventors:

Raynold M. Kahn - Los Angeles CA, US
Gregory J. Gagnon - Torrance CA, US
David D. Ha - San Gabriel CA, US
Peter M. Klauss - Torrance CA, US
Christopher P. Curren - Brentwood CA, US
Thomas H. James - Pacific Palisades CA, US

Assignee:

The DirecTV Group, Inc. - El Segundo CA

International Classification:

H04L 9/00

US Classification:

380201, 705 51

Abstract:

A method and apparatus for storing and retrieving program material for subsequent replay is disclosed. The apparatus comprises a tuner, for receiving a data stream comprising encrypted access control information and the program material encrypted according to a first encryption key, the access control information including the first encryption key; a first encryption module, communicatively coupled to the tuner and communicatively coupleable to a media storage device, for further encrypting the encrypted program material according to a second encryption key and for encrypting the second encryption key according to a third encryption key to produce a fourth encryption key; a first decryption module communicatively coupleable to the media storage device, for decrypting the fourth encryption key retrieved from the media storage device using the third encryption key to produce the second encryption key, and for decrypting the further encrypted program material retrieved from the media program device to produce the encrypted program material; a conditional access module communicatively coupled to the first decryption module, for decrypting the encrypted access control information to produce the first encryption key; and a second decryption module, for decrypting the program material using the first encryption key.

US Patent:

7203314, Apr 10, 2007

Filed:

Jul 21, 2000

Appl. No.:

09/620773

Inventors:

Raynold M. Kahn - Los Angeles CA, US
Gregory J. Gagnon - Torrance CA, US
David D. Ha - San Gabriel CA, US
Peter M. Klauss - Torrance CA, US
Christopher P. Curren - Brentwood CA, US
Thomas H. James - Pacific Palisades CA, US

Assignee:

The DirecTV Group, Inc. - El Segundo CA

International Classification:

H04N 7/167

US Classification:

380239

Abstract:

A method and apparatus for storing and retrieving program material for subsequent replay is disclosed. The apparatus comprises a conditional access module, for accepting encrypted access control information and the program material encrypted according to a first encryption key, the encrypted access control information including a first encryption key and temporally-variant control data; the conditional access module having a first decryptor module, for decrypting the encrypted access control information to produce the temporally variant control data; a conversion module for modifying the temporally-variant control data to produce temporally-invariant control data; a re-encryptor module, for re-encrypting the decrypted access control information; a second decryptor module for decrypting the re-encrypted access control information to produce the first encryption key; a copy protection encryption module, communicatively coupleable to the conditional access module and a media storage device, the copy protection encryption module for further encrypting the encrypted program material according to a second encryption key and for encrypting the second encryption key according to a third encryption key to produce a fourth encryption key; and a copy protection decryption module, communicatively coupleable to the conditional access module and the media storage device, the copy protection decryption module for decrypting the encrypted fourth encryption key to produce the second encryption key using the third encryption key.

US Patent:

7225458, May 29, 2007

Filed:

Nov 21, 2002

Appl. No.:

10/302414

Inventors:

Peter M. Klauss - Torrance CA, US
Raynold M. Kahn - Los Angeles CA, US
Gregory J. Gagnon - Torrance CA, US
David D. Ha - San Gabriel CA, US

Assignee:

The DirecTV Group, Inc. - El Segundo CA

International Classification:

H04H 1/00
H04H 7/00

US Classification:

725 63, 455 302, 725 25

Abstract:

A method and apparatus for receiving conditional access information (CAI) on one or more of a plurality of tuners while the user is selecting different channels is disclosed. The method comprises the steps of receiving the CAI on a first tuner tuned to a first channel; identifying the first tuner as the tuner receiving the CAI; and commanding the second tuner to receive the CAI after receiving a command to retune the first tuner from the first channel to a second channel.

US Patent:

7409562, Aug 5, 2008

Filed:

Sep 21, 2001

Appl. No.:

09/960824

Inventors:

Raynold M. Kahn - Los Angeles CA, US
Gregory J. Gagnon - Torrance CA, US
David D. Ha - San Gabriel CA, US
Peter M. Klauss - Torrance CA, US
Christopher P. Curren - Brentwood CA, US
Ronald P. Cocchi - Seal Beach CA, US
Thomas H. James - Pacific Palisades CA, US

Assignee:

The DIRECTV Group, Inc. - El Segundo CA

International Classification:

H04L 9/08
H04N 7/167

US Classification:

713194, 380283, 725 31

Abstract:

A system and method for storing and retrieving program material for subsequent replay is disclosed. The method includes accepting a receiver ID associated with a receiver key stored in a memory of the receiver, determining a pairing key for encrypting communications between the conditional access module and the receiver, encrypting the pairing key with the receiver key, and transmitting a message comprising the encrypted pairing key to the receiver. The apparatus comprises a receiver for receiving a data stream transmitting a media program encrypted according to a media encryption key and an encrypted media encryption key and a conditional access module, communicatively coupleable with the receiver.

US Patent:

7457414, Nov 25, 2008

Filed:

Jul 21, 2000

Appl. No.:

09/620772

Inventors:

Raynold M. Kahn - Los Angeles CA, US
Gregory J. Gagnon - Torrance CA, US
David D. Ha - San Gabriel CA, US
Peter M. Klauss - Torrance CA, US
Christopher P. Curren - Brentwood CA, US
Thomas H. James - Pacific Palisades CA, US

Assignee:

The DIRECTV Group, Inc. - El Segundo CA

International Classification:

H04N 7/167

US Classification:

380201, 705 9, 705 20

Abstract:

A method and apparatus for storing and retrieving program material for subsequent replay is disclosed. In summary, the present invention describes a system and method for storing and retrieving program material for subsequent replay. The method comprises the steps of accepting encrypted access control information and the program material encrypted according to a first encryption key, the access control information including a first encryption key and control data; decrypting the received access control information to produce the first encryption key; decrypting the program material using the first encryption key; re-encrypting the program material using according to a second encryption key; encrypting the second encryption key according to a third encryption key to produce a fourth encryption key; and providing the re-encrypted program material and a fourth encryption key for storage. The apparatus comprises a conditional access module, for accepting encrypted access control information and the program material encrypted according to a first encryption key, the encrypted access control information including the first encryption key and temporally-variant control data, the control access module comprising a first decryption module, for decrypting the access control information to produce the first encryption key; a first encryption module, for encrypting a second encryption key with a third encryption key to produce a fourth encryption key; and a second decryption module for decrypting the fourth encryption key to produce the second encryption key.