ETRI Reports Successful Free-Space Quantum Key Distribuyion in daylight

(InnovationToronto) The Electronics and Telecommunications Research Institute (ETRI) has reported a successful free-space quantum key distribution (QKD) in daylight with the self-developed polarization encoding chip for the first time. QKD is one of the most promising secure communication technologies, which encodes information into a single-photon, the smallest measurable unit of light.
–ETRI’s free-space QKD system works successfully even during the daylight whereas most other systems have failed to operate properly due to substantial amount of noise photons from sunlight.
–ETRI’s QKD system is configured with the self-developed polarization encoding chip, which dramatically reduces the size of the system compared to conventional QKD systems.