  In quantum illumination entangled light is employed to enhance the detection
accuracy of an object when compared with the best classical protocol. On the
other hand, cloaking is a stealth technology based on covering a target with a
material deflecting the light around the object to avoid its detection. Here,
we propose a quantum illumination protocol especially adapted to quantum
microwave technology. This protocol seizes the phase-shift induced by some
cloaking techniques, such as scattering reduction, allowing for a $3$ dB
improvement in the detection of a cloaked target. The method can also be
employed for the detection of a phase-shift in bright environments in different
frequency regimes. Finally, we study the minimal efficiency required by the
photocounter for which the quantum illumination protocol still shows a gain
with respect to the classical protocol.
