Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2006-10-31
2006-10-31
Louis-Jacques, Jacques H. (Department: 2134)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
C380S044000, C710S106000, C726S030000
Reexamination Certificate
active
07131004
ABSTRACT:
A communication system including a transmitter, a receiver, and a serial link (for example, a TMDS-like link) in which video data (or other data) are encrypted, the encrypted data are transmitted from the transmitter to the receiver, and the transmitted data are decrypted in the receiver, a transmitter and a receiver for use in such systems, a cipher engine for use in such a transmitter or receiver, a method for operating such a transmitter or receiver to encrypt or decrypt data, and a method for authenticating a receiver prior to transmission of encrypted data to the receiver over a serial link. Each transmitter, receiver, and cipher engine is configured to implement a content protection protocol in a manner that implements at least one and preferably more than one of a class of attack prevention features disclosed herein. In preferred embodiments the invention is employed to encrypt data in accordance with the High-bandwidth Digital Content Protection (“HDCP”) protocol, or a modified version of the HDCP protocol.
REFERENCES:
patent: 5534857 (1996-07-01), Laing et al.
patent: 5682534 (1997-10-01), Kapoor et al.
http://www.tidbits.com/tb-issues/TidBITS-234.html, http://www.tidbits.com/tb-issues/TidBITS-235.html, http://web.archive.org/web/20010424183636/http://www.sassafras.com/docs50/starting.htm, http://quest.cc.purdue.edu/˜aeh/archive/1996/msg00179.html.
http://www.kidsfirstsoccer.com/w3infotec/pc—n.htm, http://www.macromedia.com/support/licensing.
High-Bandwidth Digital Content Protection System, Revision 1.0, by Intel Corporation, Feb. 17, 2000. pp. 1-60.
High-Bandwith Digital Content Protection System Revision 1.0 Erratum, by Intel Corporation, Mar. 19, 2001, pp. 1-9.
Upstream Link for High-bandwidth Digital Content Protection, Revision 1.00, by Intel Corporation, Jan. 26, 2001, pp. 1-38.
Irwin, Keith“Four Simple Cryptographic Attacks on HDCP”, pp. 1-7, downloaded from the Internet on Aug. 21, 2001 from http://www/angelfire.com/realm/keithirwin/HDCPAttacks.html.
Girard & Equitz LLP
Louis-Jacques Jacques H.
Silicon Image Inc.
LandOfFree
Method and apparatus for encrypting data transmitted over a... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for encrypting data transmitted over a..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for encrypting data transmitted over a... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3666317