Encrypted data delivery system

Details Encrypted data delivery system Encrypted data delivery system

2008-07-22

2008-07-22

Moazzami, Nasser (Department: 2136)

Electrical computers and digital processing systems: support

Multiple computer communication using cryptography

C713S152000

Reexamination Certificate

active

07404076

ABSTRACT:
A system structured from a management device, a content key distribution device and a plurality of terminals suppresses the data volume of a terminal revocation list (TRL). The management device generates and transmits a TRL formed from data that expresses terminal IDs of all terminals to be invalidated, by only a value and a position of a common bit string in the IDs, to the content key distribution device. Each terminal holds a terminal ID that includes a manufacturer, ID and a serial number, and requests the distribution of a content key by sending the terminal ID to the content key distribution device. The content key distribution device refers to the TRL, judges whether the terminal ID transmitted from the terminal is that of an invalidated terminal, and if negative, encrypts and transmits the content key to the terminal.

REFERENCES:
patent: 5841865 (1998-11-01), Sudia
patent: 5949877 (1999-09-01), Traw et al.
patent: 6389403 (2002-05-01), Dorak, Jr.
patent: 6449719 (2002-09-01), Baker
patent: 6963882 (2005-11-01), Elko et al.
patent: 2001/0056541 (2001-12-01), Matsuzaki et al.
patent: 2002/0197979 (2002-12-01), Vanderveen
patent: 0 930 556 (1999-07-01), None
patent: 201437 (1990-10-01), None
patent: 216 231 (1997-05-01), None
patent: 10-322676 (1998-12-01), None
patent: 11-205305 (1999-07-01), None
Hungarian Search Report mailed Sep. 29, 2004 for Hungarian Application No. P0401787 with partial English translation.
Warwick Ford, Michael Baum, Secure Electronic Commerce, 1997, Prentice Hall, Section 6.6, pp. 230-239.
“5C Digital Transmission Content Protection White Paper”, Revision 1.0, Jul. 14, 1998, p. 12.

Affiliated with

Also associated with

Rating

Encrypted data delivery system does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Encrypted data delivery system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Encrypted data delivery system will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2747316