Applicability of Squeezed-and Coherent-State Continuous-Variable Quantum Key Distribution over Satellite Links

• URL: http://arxiv.org/abs/2101.09270v1
• Date: Fri, 22 Jan 2021 18:44:54 GMT
• Title: Applicability of Squeezed-and Coherent-State Continuous-Variable Quantum Key Distribution over Satellite Links
• Authors: Ivan Derkach, Vladyslav C Usenko
• Abstract summary: We address the applicability of quantum key distribution with continuous-variable coherent and squeezed states over long-distance satellite-based links. We obtain tight security bounds on the untrusted excess noise on the channel output. We show that feasible amounts of optimized signal squeezing can substantially improve the applicability of the protocols.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We address the applicability of quantum key distribution with continuous-variable coherent and squeezed states over long-distance satellite-based links, considering low Earth orbits and taking into account strong varying channel attenuation, atmospheric turbulence and finite data ensemble size effects. We obtain tight security bounds on the untrusted excess noise on the channel output, which suggest that substantial efforts aimed at setup stabilization and reduction of noise and loss are required, or the protocols can be realistically implemented over satellite links once either individual or passive collective attacks are assumed. Furthermore, splitting the satellite pass into discrete segments and extracting the key from each rather than from the overall single pass allows one to effectively improve robustness against the untrusted channel noise and establish a secure key under active collective attacks. We show that feasible amounts of optimized signal squeezing can substantially improve the applicability of the protocols allowing for lower system clock rates and aperture sizes and resulting in higher robustness against channel attenuation and noise compared to the coherent-state protocol

Related papers

• TernaryVote: Differentially Private, Communication Efficient, and Byzantine Resilient Distributed Optimization on Heterogeneous Data [50.797729676285876]
  We propose TernaryVote, which combines a ternary compressor and the majority vote mechanism to realize differential privacy, gradient compression, and Byzantine resilience simultaneously. We theoretically quantify the privacy guarantee through the lens of the emerging f-differential privacy (DP) and the Byzantine resilience of the proposed algorithm.
  arXiv  Detail & Related papers  (2024-02-16T16:41:14Z)
• End-to-End Demonstration for CubeSatellite Quantum Key Distribution [0.0]
  We investigate the feasibility of satellite-based quantum key exchange using low-cost compact nano-satellites. This paper demonstrates the first prototype of system level quantum key distribution aimed at the Cube satellite scenario.
  arXiv  Detail & Related papers  (2023-12-04T16:25:06Z)
• Blockwise Key Distillation in Satellite-based Quantum Key Distribution [68.8891637551539]
  We compare two key distillation techniques for satellite-based quantum key distribution. One is the traditional em non-blockwise strategy that treats all the signals as a whole. The other is a em blockwise strategy that divides the signals into individual blocks that have similar noise characteristics and processes them independently.
  arXiv  Detail & Related papers  (2023-07-10T01:34:58Z)
• Practical quantum secure direct communication with squeezed states [55.41644538483948]
  We report the first table-top experimental demonstration of a CV-QSDC system and assess its security. This realization paves the way into future threat-less quantum metropolitan networks, compatible with coexisting advanced wavelength division multiplexing (WDM) systems.
  arXiv  Detail & Related papers  (2023-06-25T19:23:42Z)
• Optimizing state-discrimination receivers for continuous-variable quantum key distribution over a wiretap channel [1.3108652488669736]
  We address a continuous-variable quantum key distribution protocol employing quaternary phase-shift-keying (QPSK) of coherent states. We consider a pure-loss quantum wiretap channel, in which a possible eavesdropper is limited to collect the sole channel losses.
  arXiv  Detail & Related papers  (2023-06-20T12:26:06Z)
• Data post-processing for the one-way heterodyne protocol under composable finite-size security [62.997667081978825]
  We study the performance of a practical continuous-variable (CV) quantum key distribution protocol. We focus on the Gaussian-modulated coherent-state protocol with heterodyne detection in a high signal-to-noise ratio regime. This allows us to study the performance for practical implementations of the protocol and optimize the parameters connected to the steps above.
  arXiv  Detail & Related papers  (2022-05-20T12:37:09Z)
• Homodyne Detection Quadrature Phase Shift Keying Continuous-Variable Quantum Key Distribution with High Excess Noise Tolerance [7.87972015113057]
  We propose a homodyne detection protocol using the quadrature phase shift keying technique. By limiting information leakage, our proposed protocol enhances excess noise tolerance to a high level. Our results imply that the current protocol is able to distribute keys in nearly intercity area.
  arXiv  Detail & Related papers  (2021-04-22T16:10:35Z)
• Composably secure data processing for Gaussian-modulated continuous variable quantum key distribution [58.720142291102135]
  Continuous-variable quantum key distribution (QKD) employs the quadratures of a bosonic mode to establish a secret key between two remote parties. We consider a protocol with homodyne detection in the general setting of composable finite-size security. In particular, we analyze the high signal-to-noise regime which requires the use of high-rate (non-binary) low-density parity check codes.
  arXiv  Detail & Related papers  (2021-03-30T18:02:55Z)
• Round-robin differential phase-time-shifting protocol for quantum key distribution: theory and experiment [58.03659958248968]
  Quantum key distribution (QKD) allows the establishment of common cryptographic keys among distant parties. Recently, a QKD protocol that circumvents the need for monitoring signal disturbance, has been proposed and demonstrated in initial experiments. We derive the security proofs of the round-robin differential phase-time-shifting protocol in the collective attack scenario. Our results show that the RRDPTS protocol can achieve higher secret key rate in comparison with the RRDPS, in the condition of high quantum bit error rate.
  arXiv  Detail & Related papers  (2021-03-15T15:20:09Z)
• Satellite Quantum Communications: Fundamental Bounds and Practical Security [0.0]
  We apply and extend recent results in free-space quantum communications to determine the ultimate limits at which secret bits can be distributed via satellites. We study the composable finite-size secret key rates that are achievable by protocols of continuous variable quantum key distribution. We present a study with a sun-synchronous satellite, showing that its key distribution rate is able to outperform a ground chain of ideal quantum repeaters.
  arXiv  Detail & Related papers  (2020-12-03T06:53:57Z)
• Feasibility Assessment For Practical Continuous Variable Quantum Key Distribution Over The Satellite-to-Earth Channel [0.0]
  Quantum key distribution (QKD) using continuous variable (CV) technology has only been demonstrated over short-range terrestrial links. We first review the concepts and technologies that will enable CV-QKD over the satellite-to-Earth channels. We conclude that for a wide range of pragmatic system models, CS-QKD with information-theoretic security in the satellite-to-Earth channel is feasible.
  arXiv  Detail & Related papers  (2020-05-21T05:08:16Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.