As a systems hacker, you must be prepared to do savage things, unspeakable things, to kill runaway threads with your bare hands, to write directly to network ports using telnet and an old copy of an RFC that you found in the Vatican.
Madness string 3128
Perfect security is impossible. If you want your computer data to be perfectly secure, then smash your device to pieces, run them through a blender, and drop the bits into volcanic lava.