I'm hesitant to use session id (php style) because I don't know much about the secuirty issues. What is everyone else's experience with passing session id to flash and using it as a solid and secure reference point for flash and other scripts to a user.

How does sessions work when you call a loadvars form flash to another php page? The same as if you browsed there?

What about secuirty between flash and php scripts and your session ids?