Experimental Demonstration of Secure Relay in Quantum Secure Direct Communication Network
Quantum secure direct communication (QSDC) offers a practical way to realize a quantum network which can transmit information securely and reliably. Practical quantum networks are hindered by the unavailability of quantum relays. To overcome this limitation, a proposal has been made to transmit the...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-11-01
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| Series: | Entropy |
| Subjects: | |
| Online Access: | https://www.mdpi.com/1099-4300/25/11/1548 |
| _version_ | 1797459409317658624 |
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| author | Min Wang Wei Zhang Jianxing Guo Xiaotian Song Guilu Long |
| author_facet | Min Wang Wei Zhang Jianxing Guo Xiaotian Song Guilu Long |
| author_sort | Min Wang |
| collection | DOAJ |
| description | Quantum secure direct communication (QSDC) offers a practical way to realize a quantum network which can transmit information securely and reliably. Practical quantum networks are hindered by the unavailability of quantum relays. To overcome this limitation, a proposal has been made to transmit the messages encrypted with classical cryptography, such as post-quantum algorithms, between intermediate nodes of the network, where encrypted messages in quantum states are read out in classical bits, and sent to the next node using QSDC. In this paper, we report a real-time demonstration of a computationally secure relay for a quantum secure direct communication network. We have chosen CRYSTALS-KYBER which has been standardized by the National Institute of Standards and Technology to encrypt the messages for transmission of the QSDC system. The quantum bit error rate of the relay system is typically below the security threshold. Our relay can support a QSDC communication rate of 2.5 kb/s within a 4 ms time delay. The experimental demonstration shows the feasibility of constructing a large-scale quantum network in the near future. |
| first_indexed | 2024-03-09T16:50:57Z |
| format | Article |
| id | doaj.art-7d87c3d230f949b2af33a8eaa85e2465 |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-03-09T16:50:57Z |
| publishDate | 2023-11-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-7d87c3d230f949b2af33a8eaa85e24652023-11-24T14:41:05ZengMDPI AGEntropy1099-43002023-11-012511154810.3390/e25111548Experimental Demonstration of Secure Relay in Quantum Secure Direct Communication NetworkMin Wang0Wei Zhang1Jianxing Guo2Xiaotian Song3Guilu Long4Beijing Academy of Quantum Information Sciences, Beijing 100193, ChinaBeijing Academy of Quantum Information Sciences, Beijing 100193, ChinaBeijing Academy of Quantum Information Sciences, Beijing 100193, ChinaBeijing Academy of Quantum Information Sciences, Beijing 100193, ChinaBeijing Academy of Quantum Information Sciences, Beijing 100193, ChinaQuantum secure direct communication (QSDC) offers a practical way to realize a quantum network which can transmit information securely and reliably. Practical quantum networks are hindered by the unavailability of quantum relays. To overcome this limitation, a proposal has been made to transmit the messages encrypted with classical cryptography, such as post-quantum algorithms, between intermediate nodes of the network, where encrypted messages in quantum states are read out in classical bits, and sent to the next node using QSDC. In this paper, we report a real-time demonstration of a computationally secure relay for a quantum secure direct communication network. We have chosen CRYSTALS-KYBER which has been standardized by the National Institute of Standards and Technology to encrypt the messages for transmission of the QSDC system. The quantum bit error rate of the relay system is typically below the security threshold. Our relay can support a QSDC communication rate of 2.5 kb/s within a 4 ms time delay. The experimental demonstration shows the feasibility of constructing a large-scale quantum network in the near future.https://www.mdpi.com/1099-4300/25/11/1548quantum secure direct communicationquantum networkpost-quantum cryptographysecure relay |
| spellingShingle | Min Wang Wei Zhang Jianxing Guo Xiaotian Song Guilu Long Experimental Demonstration of Secure Relay in Quantum Secure Direct Communication Network Entropy quantum secure direct communication quantum network post-quantum cryptography secure relay |
| title | Experimental Demonstration of Secure Relay in Quantum Secure Direct Communication Network |
| title_full | Experimental Demonstration of Secure Relay in Quantum Secure Direct Communication Network |
| title_fullStr | Experimental Demonstration of Secure Relay in Quantum Secure Direct Communication Network |
| title_full_unstemmed | Experimental Demonstration of Secure Relay in Quantum Secure Direct Communication Network |
| title_short | Experimental Demonstration of Secure Relay in Quantum Secure Direct Communication Network |
| title_sort | experimental demonstration of secure relay in quantum secure direct communication network |
| topic | quantum secure direct communication quantum network post-quantum cryptography secure relay |
| url | https://www.mdpi.com/1099-4300/25/11/1548 |
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