2019/08/31 by Henry Semenenko, Philip Sibson, Andy Hart +4 · 3 citations
Computer Science · Engineering · Physics and Astronomy · #Adversary #Channel (broadcasting) #Computer network #Computer science #Computer security #Distributed computing #Electrical engineering #Engineering #Key (lock) #Key distribution #Key exchange #Physics #Public-key cryptography #Quantum #Quantum Computing Algorithms and Architecture #Quantum Information and Cryptography #Quantum Mechanics and Applications #Quantum cryptography #Quantum information #Quantum key distribution #Secure communication #Topology (electrical circuits) #Transmitter #quant-ph
paper · pdf · doi:10.1364/optica.379679
published as Optica 7 (3), 238-242 (2020)
openalex publication_date 2020/02/13 · arxiv created 2020/03/30 · arxiv updated 2020/04/01 · openalex created_date 2020/11/23 · openalex updated_date 2026/08/05
Modern communication strives towards provably secure systems which can be widely deployed. Quantum key distribution provides a methodology to verify the integrity and security of a key exchange based on physical laws. However, physical systems often fall short of theoretical models, meaning they can be compromised through uncharacterized side-channels. The complexity of detection means that the measurement system is a vulnerable target for an adversary. Here, we present secure key exchange up to 200 km while removing all side-channels from the measurement system. We use mass-manufacturable, monolithically integrated transmitters that represent an accessible, quantum-ready communication platform. This work demonstrates a network topology that allows secure equipment sharing which is accessible with a cost-effective transmitter, significantly reducing the barrier for widespread uptake of quantum-secured communication.