Alexus Computer Consulting

Cryptographic Technology

Expert Witness analysis and testimony for patent cases involving encryption and authentication technology. Analyzed Web server and Internet system implementations for symmetric key data encryption, public key encryption and authentication technology, including IPSec, PGP, SSL, key exchange mechanisms, digital certificates, message digest codes, message authentication codes, TCP/IP networking, etc.

U.S. District Court, Eastern District of Texas, Marshall Division

Civil Action No.         Civil Action No. 2:06-CV-72 (Hon. David Folsom)

Matter:                  eCommerce patent litigation.

Technical Issues:  

eCommerce software; data encryption and authentication technology including IPSec, PGP, SSL, key exchange and Message Authentication Codes; TCP/IP networking.

Responsibilities:

Invalidity report, non-infringement report. Deposition testimony December, 2009.

Testified as an expert witness in jury trial on behalf of defendant The Clearing House March 24, 2010 regarding non-infringement.

Law Firm:            

Fitzpatrick, Cella, Harper & Scinto, New York, and Sullivan & Cromwell LLP for defendant Clearing House Payments.

Opposing counsel: Ostrow Kaufman Frankl, New York, Ward & Smith, TX, Nix Patterson Roach, TX.

Dongjin Semichem v. EmailFund

American Arbitration Association

AAA Case No. 50 T 168 0013403

Matter:                  Software development contract dispute.

Technical Issues:  

Elliptic Curve Cryptography for wireless handheld devices. Encompasses Wireless Public Key Infrastructure, ECC algorithms, RSA algorithms, equivalence of Public Key and Symmetric Key encryption strengths, and WTLS.

Responsibilities:   

Wrote expert declaration. Conducted research on technical issues for plaintiff. Testified as an expert witness in AAA Hearing before the Arbitrator.

Law Firm:            

Lee, Kim & Song Professional Law Corporation, Los Angeles, CA for plaintiff.

Opposing counsel: Sonnenschein Nath & Rosenthal LLP, Chicago, IL

Leon Stambler v. J.P. Morgan Chase, First Tennessee

U.S. District Court, Eastern District of Texas, Marshall Division

Civil Action No. 2:08-CV-204.

Matter:                  Authentication of POS transactions using cryptographic methods.

Technical Issues:  

Point-of-Sale cryptography, Secure Sockets Layer, authentication and encryption techniques using Public Key, Digital Certificates, Smart Cards and Symmetric Key cryptography.

Responsibilities:   

Wrote invalidity report as an expert witness regarding the Stambler ’302 and ’148 patents.

Law Firms:           

Andrews Kurth, Dallas, TX, for defendants First Tennessee Bank and Compass Bank.

Opposing counsel: Ward & Smith Law Firm, Longview, TX.