an anchor hasp comprising a locking hub and a first locking means integrally formed with a first mounting plate;

a locking hasp integrally formed with a second mounting plate and having a mating element and a second locking means formed therein; and

a locking bar rotatably mounted on said anchor hasp, said locking bar having a cylinder lock encased therein and an engagement means formed therewith;

said cylinder lock being operable such that when rotated into an unlocked mode, said locking bar is pivotally enabled to assume one of open and closed positions in interaction with said first and second locking means, and when said cylinder lock is rotated into a locked mode, said engagement means of said locking bar engages said mating element of said locking hasp,

said bar-lock being constructed without seams, protrusions, orifices, and physical features commonly subject to attempts at forced intrusions and open to attack by use of a crowbar, saw, wire cutter, drill and other similar implements,

wherein said first and second locking means comprise a channel having formed therein a first locking bay defined as a closed position locking bay, and a second locking bay defined as an open position locking bay, said first and second locking bays being disposed at opposing ends of said channel,

and wherein when said locking bar is pivoted to disengage from said mating element of said locking hasp, a locking cam engages said open position locking bay, securing said locking bar in said open position.