Benjamin A. Yarbrough Chief Executive Officer

Benjamin A. Yarbrough (Ben) serves as Chief Executive Officer for Calyptix Security, coming to the company with more than 10 years experience working with growth companies, entrepreneurs and investors. At Calyptix Security, Yarbrough directs business operations and strategic development focusing on operations, sales, strategic relationships, and finance.

Prior to joining Calyptix Security, Yarbrough has practiced law in Charlotte, North Carolina where he has represented institutional investors, businesses and individuals in a wide range of business dealings. He worked at Kennedy, Covington, Lobdell & Hickman in the firm's corporate practice group from 1994 to 2004, with a focus on business law, equity and debt finance, mergers and acquisitions, securities, entrepreneurial businesses and startups. As a partner with Foodman, Hunter & Karres, which he joined in January 2005, Yarbrough has concentrated his legal practice on counseling entrepreneurs and middle market growth companies at all stages of development.

Yarbrough earned a Bachelor of Arts degree in economics from Davidson College in 1989, graduating cum laude. During college he was a member of Phi Beta Kappa and Omicron Delta Epsilon. Yarbrough completed his juris doctorate at the University of Virginia, where he was a member of the Virginia Tax Review.

Lawrence Teo, Ph.D. Vice President & Co-founder

Lawrence Teo serves as Vice President of Development at Calyptix Security, which he co-founded in 2002. At Calyptix, he leads the development team that builds the AccessEnforcer, the company's flagship product. Teo is actively involved in the entire product lifecycle, where he assesses customer requirements and translates them into tangible features on the AccessEnforcer to solve real-world needs. His other responsibilities include managing the day-to-day technical operations in the company, interfacing with customers and end-users, and conducting quality assurance and testing procedures.

Teo has been involved in the field of information security since 1995. As part of his doctoral dissertation, Teo conceived and developed DyVax™, the patent-pending technology that filters malicious Internet traffic without signatures on the AccessEnforcer. He has published articles in scientific conferences and commercial publications like Sys Admin Magazine and Linux Journal, and contributed code to open source projects. Prior to co-founding Calyptix Security, Teo conducted research, developed software, and taught lectures on various areas in IT and security in Australia, Singapore, and the United States.

Teo graduated with first class honors in computing from Monash University in Australia, and earned his Ph.D. in information security from the University of North Carolina at Charlotte. He was a member of Phi Beta Delta and the Golden Key International Honor Society in college.

Yuliang Zheng, Ph.D. Co-founder

Yuliang Zheng co-founded Calyptix Security in 2002, and served as the company's Chief Technology Officer for a number of years. Also a professor of information technology at UNC Charlotte, Zheng has more than 20 years of experience in the cyber security field.

In his years of experience with software and information technology, Zheng has traversed both the commercial and scholastic sides of the industries. He worked for two years as a software engineer at a telecommunication company after completing his undergraduate degree, and, after earning his PhD, moved to Australia. There he worked at first as a security research scientist at the Australian Defense Force Academy, then as a professor at the University of Wollongong and Monash University. In August 2001, Zheng was invited to join the faculty of UNC Charlotte to lead security research at the Information Security and Assurance Center and the NSA-recognized Center of Excellence in Information Assurance Education. Since 1985 he has consulted for a large number of banks, computer and telecommunication companies, and governments at all levels.

Zheng earned his Bachelor of Science degree in computer science from the Nanjing Institute of Technology in 1982, and was honored as the year's Most Distinguished Graduate. He then went on to Yokohama National University in Japan, where he earned his master's and PhD degrees in electrical and computer engineering. Zheng has published numerous articles and books on security and holds a number of patents in security. He is known as the father of "signcryption" technology and is widely recognized as an international authority in cryptography and network security.