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Characterisation of state-preparation uncertainty in quantum key distribution
Anqi Huang, Akihiro Mizutani, Hoi-Kwong Lo +2
To achieve secure quantum key distribution, all imperfections in the source unit must be incorporated in a security proof and measured in the lab. Here we perform a proof-of-princi…
Protecting fiber-optic quantum key distribution sources against light-injection attacks
Anastasiya Ponosova, Daria Ruzhitskaya, Poompong Chaiwongkhot +3
A well-protected and characterised source in a quantum key distribution system is needed for its security. Unfortunately, the source is vulnerable to light-injection attacks, such…
Faking photon number on a transition-edge sensor
Poompong Chaiwongkhot, Jiaqiang Zhong, Anqi Huang +3
We study potential security vulnerabilities of a single-photon detector based on superconducting transition-edge sensor. In a simple experiment, we show that an adversary could fak…
A low-noise single-photon detector for long-distance free-space quantum communication
Elena Anisimova, Dmitri Nikulov, Simeng Simone Hu +5
We build and test a single-photon detector based on a Si avalanche photodiode Excelitas 30902SH thermoelectrically cooled to -100 deg. C. Our detector has dark count rate below 1 H…
Independent quality assessment of a commercial quantum random number generator
Mikhail Petrov, Igor Radchenko, Damian Steiger +3
We reverse-engineer, test and analyse hardware and firmware of the commercial quantum-optical random number generator Quantis from ID Quantique. We show that > 99% of its output da…
Optical control of single-photon negative-feedback avalanche diode detector
Gaëtan Gras, Nigar Sultana, Anqi Huang +4
We experimentally demonstrate optical control of negative-feedback avalanche diode (NFAD) detectors using bright light. We deterministically generate fake single-photon detections…