Abstract: A high security locking assembly for an above-ground communications network enclosure comprises a claw-like structure having, at one end, a slide bar with an end plate that carries a first set of locking pins, and a base plate, at the other end, having an end plate that carries a second set of locking pins. The slide bar travels axially in a guide channel below a rigid frame that holds a captive locking bolt positioned to engage one of a series of axially spaced locking holes on the slide bar. The locking pins face one another and are adapted for sliding into corresponding locking pin holes in the sides of enclosure. The claw-like structure is closed by sliding the slide bar into the guide channel, and positioning the pins in the locking pin holes, followed by locking the captive locking bolt in a selected one of the locking holes.