Electrical computers and digital processing systems: support – Multiple computer communication using cryptography – Particular communication authentication technique
Reexamination Certificate
2011-03-01
2011-03-01
Lipman, Jacob (Department: 2434)
Electrical computers and digital processing systems: support
Multiple computer communication using cryptography
Particular communication authentication technique
Reexamination Certificate
active
07900047
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.
patent: 6944770 (2005-09-01), Henderson et al.
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.
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.
Girard & Equitz LLP
Lipman Jacob
Silicon Image Inc.
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