Vadim Makarov, Norwegian University of Science and Technology (NTNU)
Abstract
Quantum cryptography, unbreakable in principle, can currently be hacked through implementation loopholes. I present a recently explored detector control loophole, where a bright light is used by an eavesdropper to
induce clicks in single-photon detectors deterministically. This allows a perfect attack, delivering the eavesdropper a full secret key without alerting legitimate users. We have shown that this loophole is present in
both commercial quantum key distribution systems currently available on the market (manufactired by ID Quantique, Switzerland and MagiQ Technologies, USA). Also, we have demonstrated a full attack on an
entanglement-based research system built at the National University of Singapore.
The talk will include an equipment demonstration of detector control by an eavesdropper.