Key table and authorization table management

Details Key table and authorization table management Key table and authorization table management

2006-02-07

2011-11-01

Srivastava, Vivek (Department: 2433)

Cryptography

Key management

C713S182000, C713S189000, C713S192000, C380S200000, C380S203000, C380S210000, C380S278000

Reexamination Certificate

active

08050406

ABSTRACT:
A receiver device consistent with certain embodiments that receives and decrypts digital cable or satellite television signals has a receiver that tunes and demodulates the television signal into a digital transport stream. A decrypter decrypts the digital transport stream using a pair of decryption keys. A first decryption key array stored in a first storage location forming a part of the receiver device, and a second key array stored in a second storage location forming a part of the receiver device, the first and second key arrays representing ordered pairs of keys. An authorization table is stored in a third storage location forming a part of the receiver device, the authorization table containing a mapping, wherein each ordered pair of decryption keys corresponds to a different one of a plurality of Multichannel Video Program Distributors (MVPD). This abstract is not to be considered limiting, since other embodiments may deviate from the features described in this abstract.

REFERENCES:
patent: 4809327 (1989-02-01), Shima
patent: 5020129 (1991-05-01), Martin et al.
patent: 5237611 (1993-08-01), Rasmussen et al.
patent: 5915025 (1999-06-01), Taguchi et al.
patent: 6351813 (2002-02-01), Mooney et al.
patent: 6359986 (2002-03-01), Tatebayashi
patent: 6601237 (2003-07-01), Ten Kate et al.
patent: 6697489 (2004-02-01), Candelore
patent: 2001/0030959 (2001-10-01), Ozawa et al.
patent: 2002/0001386 (2002-01-01), Akiyama
patent: 2002/0076204 (2002-06-01), Nakano et al.
patent: 2002/0101995 (2002-08-01), Hashimoto et al.
patent: 2003/0026431 (2003-02-01), Hammersmith
patent: 2004/0105549 (2004-06-01), Suzuki et al.
patent: 2004/0158721 (2004-08-01), Candelore
patent: 2004/0162980 (2004-08-01), Lesenne et al.
patent: 2004/0181800 (2004-09-01), Rakib et al.
patent: 2006/0031873 (2006-02-01), Fahrny et al.
802.11i (How we got here and where are we headed) Sans Institute by Elio Perez Aug. 21, 2004.
International Search Report and Written Opinion of the International Searching Authority, PCT/US06/17016, Feb. 28, 2008 (Received Mar. 13, 2008).

Affiliated with

Also associated with

Rating

Key table and authorization table management does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Key table and authorization table management, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Key table and authorization table management will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4303469