Editing WoW:API securecall (section)

{{wowapi}}__NOTOC__
This function allows you to call an another function (with the possibility to pass arguments to it) and restore secure status that was active before calling this aforementionned function.

That means that if the function that was called by securecall() was tainted by untrusted code (probably through hooking), and that prior the call the environment was secure, it'll remain secure after the call, thus not breaking protected functions calls.

This function has no particular effect if called from an unsecure (tainted) environment, as 'unsecure' state is restored after the call.

 securecall(function[, ...])