In principle, quantum key distribution (QKD) offers information-theoretic security based on
the laws of physics. In practice, however, the imperfections of realistic devices might …

Although the unconditional security of quantum key distribution (QKD) has been widely
studied, the imperfections of the practical devices leave potential loopholes for Eve to spy …

We perform a proof-of-principle demonstration of the measurement-device-independent
quantum key distribution protocol using weak coherent states and polarization-encoded …

Characterizing the physical channel and calibrating the cryptosystem hardware are
prerequisites for establishing a quantum channel for quantum key distribution (QKD) …

Quantum steering allows two parties to verify shared entanglement even if one
measurement device is untrusted. A conclusive demonstration of steering through the …

A quantum key distribution (QKD) system may be probed by an eavesdropper Eve by
sending in bright light from the quantum channel and analyzing the backreflections. We …

An eavesdropper Eve may probe a quantum key distribution (QKD) system by sending a
bright pulse from the quantum channel into the system and analyzing the back-reflected …

Quantum key distribution (QKD) based on the laws of quantum physics allows the secure
distribution of secret keys over an insecure channel. Unfortunately, imperfect …

Many quantum key distribution systems employ a laser followed by an optical attenuator to
prepare weak coherent states in the source. Their mean photon number must be …

We propose a class of attacks on quantum key distribution (QKD) systems where an
eavesdropper actively engineers new loopholes by using damaging laser illumination to …