Academic Journal
Unidimensional Two-Way Continuous-Variable Quantum Key Distribution Using Coherent States
| Title: | Unidimensional Two-Way Continuous-Variable Quantum Key Distribution Using Coherent States |
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| Authors: | Yiming Bian, Luyu Huang, Yichen Zhang |
| Source: | Entropy, Vol 23, Iss 3, p 294 (2021) |
| Publisher Information: | MDPI AG, 2021. |
| Publication Year: | 2021 |
| Collection: | LCC:Science LCC:Astrophysics LCC:Physics |
| Subject Terms: | continuous-variable quantum key distribution, two-way scheme, unidimensional modulation, general two-mode attacks, optimal attack strategy, Science, Astrophysics, QB460-466, Physics, QC1-999 |
| More Details: | We propose a unidimensional two-way continuous-variable quantum key distribution protocol with coherent states, where the sender modulates a single quadrature of the coherent states rather than both quadratures to simplify the structure of a two-way system. Security analysis is performed with a general attack strategy, known as two-mode attack, which helps to reduce limitations in the analysis. The performance of the protocol under all accessible two-mode attacks at fixed distance is illustrated. Further, two typical two-mode attack strategies are obtained from it, which are one-mode attack strategy and optimal two-mode attack strategy. Between them, the one-mode attack is the simplest form of the two-mode attack, while the optimal two-mode attack is the most complicated one. Simulations show that though the system is simplified, the performance of the two-way protocol with unidimensional modulation is still comparable to that of the counterpart with Gaussian modulation even against the optimal two-mode attack when Eve’s ability is maximized. Thus, the proposed protocol simplifies the two-way system while guaranteeing its performance to a certain extent. Especially in a practical system with short transmission distance and high excess noise, the protocol has a good application prospect. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 1099-4300 |
| Relation: | https://www.mdpi.com/1099-4300/23/3/294; https://doaj.org/toc/1099-4300 |
| DOI: | 10.3390/e23030294 |
| Access URL: | https://doaj.org/article/eec777e60c104666aff20c289c40d519 |
| Accession Number: | edsdoj.777e60c104666aff20c289c40d519 |
| Database: | Directory of Open Access Journals |
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| ISSN: | 10994300 |
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| DOI: | 10.3390/e23030294 |
| Published in: | Entropy |
| Language: | English |