TY - UNPB
T1 - Security of a Continuous-Variable based Quantum Position Verification Protocol
AU - Allerstorfer, Rene
AU - Escolà-Farràs, Llorenç
AU - Ray, Arpan Akash
AU - Škorić, Boris
AU - Speelman, Florian
AU - Lunel, Philip Verduyn
N1 - 17 pages, 2 figures
PY - 2023/8/8
Y1 - 2023/8/8
N2 - In this work we study quantum position verification with continuous-variable quantum states. In contrast to existing discrete protocols, we present and analyze a protocol that utilizes coherent states and its properties. Compared to discrete-variable photonic states, coherent states offer practical advantages since they can be efficiently prepared and manipulated with current technology. We prove security of the protocol against any unentangled attackers via entropic uncertainty relations, showing that the adversary has more uncertainty than the honest prover about the correct response as long as the noise in the quantum channel is below a certain threshold. Additionally, we show that attackers who pre-share one continuous-variable EPR pair can break the protocol.
AB - In this work we study quantum position verification with continuous-variable quantum states. In contrast to existing discrete protocols, we present and analyze a protocol that utilizes coherent states and its properties. Compared to discrete-variable photonic states, coherent states offer practical advantages since they can be efficiently prepared and manipulated with current technology. We prove security of the protocol against any unentangled attackers via entropic uncertainty relations, showing that the adversary has more uncertainty than the honest prover about the correct response as long as the noise in the quantum channel is below a certain threshold. Additionally, we show that attackers who pre-share one continuous-variable EPR pair can break the protocol.
KW - quant-ph
M3 - Preprint
BT - Security of a Continuous-Variable based Quantum Position Verification Protocol
ER -