Most of the time they aren't. And if they are you probably can't protect against the attacker. From elsewhere on this thread: https://www.schneier.com/blog/arc

Most of the time they aren't. And if they are you probably can't protect against the attacker. From elsewhere on this thread: https://www.schneier.com/blog/archives/2015/08/mickens_on_secu.html https://www.schneier.com/blog/archives/2015/08/mickens_on_se...