Oh, jeez. Come on. "Super secret"? Can we get a bit more tinfoilish?
"index.dat" is exactly what it sounds like - an index of IE's browser cache and associated cookies, built in order to speed up cache accesses. It's hardly "secret", and hardly worth the paranoia being engendered here....
27 posted on 01/21/2003 1:15:32 PM PST by general_re