Biographical sketch of author

Messaoud Benantar   IBM/Tivoli Security Business Unit, 9442 Capital of Texas Highway North, Arboretum Plaza One, Suite 500, Austin, Texas 78759 (electronic mail: mbenanta@us.ibm.com or mbenanta@us.tivoli.com). Dr. Benantar is a senior software engineer with the IBM/Tivoli security business unit. He received his diplome d'ingenieur en informatique from the Université des Sciences et de Technologie, Bab Ezzouar, Algiers, Algeria, in 1983, and an M.S. degree in 1986 and a Ph.D. degree in 1992, both in computer science from Rensselaer Polytechnic Institute in Troy, New York. His interests include systems and network security, Internet computing, combinatorial algorithms, and graph theory and its applications.