On the (relation between) efficiency and secret key rate of QKD
Abstract The processes of evaluation and comparison play a vital role in the development of a scientific field. In the field of quantum cryptography (especially quantum key distribution, QKD), the so-called secret key rate is used for characterizing the performance of a protocol (scheme). However th...
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| Format: | Article |
| Language: | English |
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Nature Portfolio
2024-02-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-024-54246-y |
| _version_ | 1797274616373182464 |
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| author | Georgi Bebrov |
| author_facet | Georgi Bebrov |
| author_sort | Georgi Bebrov |
| collection | DOAJ |
| description | Abstract The processes of evaluation and comparison play a vital role in the development of a scientific field. In the field of quantum cryptography (especially quantum key distribution, QKD), the so-called secret key rate is used for characterizing the performance of a protocol (scheme). However the current definition of this quantity is incomplete. It does not consider the classical communication process taking place in a QKD protocol. There exists a quantity that involves all the procedures (resources) in a communication process: it is the efficiency (total efficiency). This paper reports a definition of this parameter. Also the relation between the total efficiency and key rate is found. By means of this relation, the total secret key rate of a QKD protocol is expressed. An application of the total key rate is demonstrated: the original twin-field QKD (TF-QKD) is evaluated in terms of this rate. The paper also shows a comparison between the total key rate and the standard key rate of a TF-QKD. |
| first_indexed | 2024-03-07T15:00:50Z |
| format | Article |
| id | doaj.art-d7beb5539ac54667817b3d595650d2d9 |
| institution | Directory Open Access Journal |
| issn | 2045-2322 |
| language | English |
| last_indexed | 2024-03-07T15:00:50Z |
| publishDate | 2024-02-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj.art-d7beb5539ac54667817b3d595650d2d92024-03-05T19:11:16ZengNature PortfolioScientific Reports2045-23222024-02-011411610.1038/s41598-024-54246-yOn the (relation between) efficiency and secret key rate of QKDGeorgi Bebrov0Telecommunications Department, Technical University of VarnaAbstract The processes of evaluation and comparison play a vital role in the development of a scientific field. In the field of quantum cryptography (especially quantum key distribution, QKD), the so-called secret key rate is used for characterizing the performance of a protocol (scheme). However the current definition of this quantity is incomplete. It does not consider the classical communication process taking place in a QKD protocol. There exists a quantity that involves all the procedures (resources) in a communication process: it is the efficiency (total efficiency). This paper reports a definition of this parameter. Also the relation between the total efficiency and key rate is found. By means of this relation, the total secret key rate of a QKD protocol is expressed. An application of the total key rate is demonstrated: the original twin-field QKD (TF-QKD) is evaluated in terms of this rate. The paper also shows a comparison between the total key rate and the standard key rate of a TF-QKD.https://doi.org/10.1038/s41598-024-54246-yQuantum key distributionKey rateEfficiency |
| spellingShingle | Georgi Bebrov On the (relation between) efficiency and secret key rate of QKD Scientific Reports Quantum key distribution Key rate Efficiency |
| title | On the (relation between) efficiency and secret key rate of QKD |
| title_full | On the (relation between) efficiency and secret key rate of QKD |
| title_fullStr | On the (relation between) efficiency and secret key rate of QKD |
| title_full_unstemmed | On the (relation between) efficiency and secret key rate of QKD |
| title_short | On the (relation between) efficiency and secret key rate of QKD |
| title_sort | on the relation between efficiency and secret key rate of qkd |
| topic | Quantum key distribution Key rate Efficiency |
| url | https://doi.org/10.1038/s41598-024-54246-y |
| work_keys_str_mv | AT georgibebrov ontherelationbetweenefficiencyandsecretkeyrateofqkd |