An apparatus for providing security for an integrated circuit (IC) chip is disclosed. The apparatus may include the IC chip, attached to a surface of a printed circuit board (PCB). The PCB may include a first, electrically insulative, conformal coating layer attached to the PCB surface and to exposed IC chip surfaces. The PCB may also include a Wheatstone bridge circuit to indicate changes to a second, X-ray opaque, optically opaque and electrically resistive, conformal coating layer. The circuit may include four resistors, formed from second conformal coating layer regions, four sets of electrically conductive pads on the PCB, each set electrically connected to a resistor of the four resistors. The circuit may also include a voltage source, connected to two conductive pads and a monitoring device, connected to another two conductive pads and configured to detect a change of resistance of the Wheatstone bridge.