Blockwise Key Distillation in Satellite-based Quantum Key Distribution
- URL: http://arxiv.org/abs/2307.04300v1
- Date: Mon, 10 Jul 2023 01:34:58 GMT
- Title: Blockwise Key Distillation in Satellite-based Quantum Key Distribution
- Authors: Minu J. Bae, Nitish K. Panigrahy, Prajit Dhara, Walter O. Krawec,
Alexander Russell, Don Towsley, Bing Wang
- Abstract summary: 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.
- Score: 68.8891637551539
- License: http://creativecommons.org/licenses/by/4.0/
- Abstract: Free-space satellite communication has significantly lower photon loss than
terrestrial communication via optical fibers. Satellite-based quantum key
distribution (QKD) leverages this advantage and provides a promising direction
in achieving long-distance inter-continental QKD. Satellite channels, however,
can be highly dynamic due to various environmental factors and time-of-the-day
effects, leading to heterogeneous noises over time. In this paper, we compare
two key distillation techniques for satellite-based QKD. 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.
Through extensive simulation in a wide range of settings, we show trends in
optimal parameter choices and when one strategy provides better key generation
rates than the other. Our results show that the blockwise strategy can lead to
up to $5\%$ key rate improvement (leading to on average $1.9\times10^{7}$ more
key bits per day) when considering two types of blocks, i.e., for nighttime and
daytime, respectively. The blockwise strategy only requires changes in the
classical post-processing stage of QKD and can be easily deployed in existing
satellite systems.
Related papers
- Practical hybrid PQC-QKD protocols with enhanced security and performance [44.8840598334124]
We develop hybrid protocols by which QKD and PQC inter-operate within a joint quantum-classical network.
In particular, we consider different hybrid designs that may offer enhanced speed and/or security over the individual performance of either approach.
arXiv Detail & Related papers (2024-11-02T00:02:01Z) - 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) - The ideal wavelength for daylight free-space quantum key distribution [35.310629519009204]
We model a satellite-to-ground quantum channel for different quantum light sources to identify the optimal wavelength for free-space QKD in ambient conditions.
Our results can be applied in roof-to-roof scenarios and are therefore relevant for near-future quantum networks.
arXiv Detail & Related papers (2023-03-03T17:49:31Z) - Satellite-Based Quantum Key Distribution in the Presence of Bypass
Channels [44.81834231082477]
Security of quantum key distribution under restricted eavesdropping scenarios is addressed.
We find regimes of operation in which the above restrictions on Eve can considerably improve system performance.
Our work opens up new security frameworks for spaceborne quantum communications systems.
arXiv Detail & Related papers (2022-12-09T12:24:40Z) - Advances in entanglement-based QKD for space applications [0.0]
Quantum key distribution (QKD) enables tap-proof exchange of cryptographic keys guaranteed by the very laws of physics.
One of the last remaining roadblocks is the high loss experienced during terrestrial distribution of photons, which limits the distance between the communicating parties.
We review the most relevant advances in entanglement-based QKD which are implementable over free-space links and thus enable distribution of secure keys from orbit.
arXiv Detail & Related papers (2022-10-05T13:09:36Z) - Finite resource performance of small satellite-based quantum key
distribution missions [36.136619420474766]
Recent developments in finite key analysis allow three small-satellite-based QKD projects to produce secret keys even under very high loss conditions.
We highlight the short and long-term perspectives on the challenges and potential future developments in small-satellite-based QKD and quantum networks.
arXiv Detail & Related papers (2022-04-26T18:00:03Z) - Towards fully-fledged quantum and classical communication over deployed
fiber with up-conversion module [47.187609203210705]
We propose and demonstrate a new method, based on up-conversion assisted receiver, for co-propagating classical light and QKD signals.
Our proposal exhibits higher tolerance for noise in comparison to the standard receiver, thus enabling the distribution of secret keys in the condition of 4 dB-higher classical power.
arXiv Detail & Related papers (2021-06-09T13:52:27Z) - Finite key effects in satellite quantum key distribution [0.0]
Satellite quantum communication overcomes optical fibre range limitations.
First realisations of satellite quantum key distribution (SatQKD) being rapidly developed.
limited transmission times between satellite and ground station severely constrains the amount of secret key due to finite-block size effects.
We quantify practical SatQKD performance limits and examine the effects of link efficiency, background light, source quality, and overpass to estimate long-term key generation capacity.
arXiv Detail & Related papers (2020-12-14T18:59:30Z) - 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.