About the Author

Bertrand du Castel, PhD, is a Schlumberger Fellow, with publications in artificial intelligence, linguistics, logic and software engineering. As chairman of several computer organizations, he won in 2005 the coveted Visionary Award from Card Technology magazine. Timothy M. Jurgensen, PhD, has authored two acclaimed books on computer security and publications in communications and physics. As a consultant to government and industry, Tim is a key contributor to the evolution of the network infrastructure of the United States.