A key cover for an equipment cabinet door handle comprising a hollow cylindrical-shaped body with a circumferential sidewall of a given perimeter. The hollow cylindrical-shaped body includes a top end and a bottom end. The top end has an axial opening therein, forming a top rim and defining sidewall thickness between an inner radius and an outer radius. The inner radius is smaller than the outer radius, the circumferential sidewall has a substantially rectangular-shaped opening formed around the given perimeter, and the substantially rectangular-shaped opening has a first arcuate length. A top portion of the circumferential sidewall at the top end forms a finger protrusion with a fingertip with a second arcuate length into the substantially rectangular-shaped opening. The bottom portion of the circumferential sidewall at the bottom end forms a curb with a third arcuate length in the substantially rectangular opening.

A security box for securing access to shipping containers and tractor trailers is provided. The security box comprises two halves that are attached by a hinge and that can be closed together. When the security box is in the closed position, it has the general shape of a closed box with openings at the sides. The openings are sized so as to accommodate a handle which rotates a lockrod assembly securing a container door. The security box can be locked by rotating a shaft protruding from within the box and then engaging an electromechanical lock. Rotation of the shaft rotates a flange attached to the end of the shaft so that it rotates behind two fixed flanges which block the rotatable flange from moving outward, and hence the box from opening. In this way, the handle is secured within the box and prevented from being rotated away from the container door, which in turn prevents the lockrod assembly from being rotated and the container door from being opened. The electromechanical lock is operated solely by proximity of a device with a digital key, allowing access to the container to be better controlled and logged.