How to secure WP in 3 easy steps:
Build an underground bunker from reinforced concrete in a hidden unknown location, using hand tools under camouflage netting.
Hire single ex-USMC drill sergeants and dog handlers, with their mutts, and arm them to the teeth. Tell them that the ragheads have announced their intention to destroy the place, and pay them well.
Put the server in a locked rack inside the bunker; then, using a sharp axe, sever all cabling from the back of the unit. Be sure and wear gloves for this step.
Presto! Secure WordPress in 3 easy steps.