The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 25, 2009
Filed:
Jan. 16, 2004
Raynold M. Kahn, Los Angeles, CA (US);
Gregory J. Gagnon, Torrance, CA (US);
Christopher P. Curren, Brentwood, CA (US);
Thomas H. James, Pacific Palisades, CA (US);
Raynold M. Kahn, Los Angeles, CA (US);
Gregory J. Gagnon, Torrance, CA (US);
Christopher P. Curren, Brentwood, CA (US);
Thomas H. James, Pacific Palisades, CA (US);
The DIRECTV Group, Inc., El Segundo, CA (US);
Abstract
A host receiver and a client receiver are operatively in a direct broadcast satellite system. Program materials received by the host receiver from the direct broadcast satellite system are decrypted by the host receiver. The decrypted program materials are then encrypted at the host receiver using a copy protection key. The copy protection key is encrypted at the host receiver using a host-client pairing key shared between the host receiver and client receiver. The encrypted program materials and the encrypted copy protection key are transferred from the host receiver to the client receiver. The transferred copy protection key is decrypted at the client receiver using the host-client pairing key. The transferred program materials are then decrypted at the client receiver using the decrypted copy protection key.