Finite-key analysis for time-energy high-dimensional quantum key distribution
Author(s)Furrer, Fabian; Niu, Murphy Yuezhen; Xu, Feihu; Shapiro, Jeffrey H
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Time-energy high-dimensional quantum key distribution (HD-QKD) leverages the high-dimensional nature of time-energy entangled biphotons and the loss tolerance of single-photon detection to achieve long-distance key distribution with high photon information efficiency. To date, the general-attack security of HD-QKD has only been proven in the asymptotic regime, while HD-QKD's finite-key security has only been established for a limited set of attacks. Here we fill this gap by providing a rigorous HD-QKD security proof for general attacks in the finite-key regime. Our proof relies on an entropic uncertainty relation that we derive for time and conjugate-time measurements that use dispersive optics, and our analysis includes an efficient decoy-state protocol in its parameter estimation. We present numerically evaluated secret-key rates illustrating the feasibility of secure and composable HD-QKD over metropolitan-area distances when the system is subjected to the most powerful eavesdropping attack.
DepartmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science; Massachusetts Institute of Technology. Department of Physics; Massachusetts Institute of Technology. Research Laboratory of Electronics
Physical Review A
American Physical Society
Niu, Murphy Yuezhen et al. “Finite-Key Analysis for Time-Energy High-Dimensional Quantum Key Distribution.” Physical Review A 94.5 (2016): n. pag. © 2016 American Physical Society.
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