Which should I use?
In deciding which type of Authentication to use,
it's important to keep the following points in mind:
You want the widest possible audience,
along with browser and platform independence.
(impacts NTCR (Integrated Windows Authentication in Windows 2000) and cookies)
Performance is critical. If (as you hope), your
site becomes wildly popular,
you don't want a dead-slow server
(impacts SSL/Certificates, ASP)
Kevin Flick, Flicks Software