Vesna Hassler is a member of A-SIT (Secure Information Technology Center, Austria). Her research and teaching focus is on network and e-commerce security. She is also an independent consultant. She received her B.Sc. and M.Sc. degrees in Electrical Engineering from Zagreb University (Croatia), and her Ph.D. degree from Graz University of Technology (Austria). Dr. Hassler has published a number of conference and journal papers on cryptography, network security, payment systems, and smart cards.

• Introduction to security; security mechanisms; key management and certificates; electronic payment systems; payment security services; payment transaction security; digital money security; electronic check security; an electronic payment framework; communication network; network access layer security; Internet layer security; transport layer security; application layer security; the HyperText Transfer Protocol; Web server security; Web client security; mobile code security; Web-based e-commerce concepts; mobile agent security; mobile commerce security; smart card security.