The title and abstract are as follows:

“Secure Communication via Quantum Illumination”

Entanglement is essential to many quantum information applications, but it is easily destroyed. Quantum illumination, however, thrives on entanglement-breaking loss and noise. First proposed for enhancing the signal-to-noise ratio for detecting a weakly-reflecting target in the presence of strong background noise, quantum illumination was later shown, theoretically, to enable high data-rate classical communication that is immune to passive eavesdropping. In both applications Alice generates a pair of entangled light beams (signal and idler), retaining the idler and transmitting the signal. By making a joint measurement on the retained and returned light, where the latter is either background noise plus target reflection (for target detection) or Bob's modulated and amplified version of the signal he received from Alice (for secure communication), quantum illumination achieves a substantial benefit from its initial entanglement, despite the roundtrip lossy, noisy propagation channel's having left the retained and returned light in a separable state. We report the first experimental demonstration of quantum illumination's passive-eavesdropping immunity.