Twin-field quantum digital signatures.
Twin-field quantum digital signatures.
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DOI：
10.1364/ol.426369
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发表时间：
2020-03
期刊：
影响因子：
3.6
通讯作者：
Chunhui Zhang;Xingyu Zhou;Chunmei Zhang;Jian Li;Qin Wang
中科院分区：
文献类型：
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作者：
Chunhui Zhang;Xingyu Zhou;Chunmei Zhang;Jian Li;Qin Wang
数字签名是信息安全中的一项关键技术，特别是在身份认证方面。与传统的通信方式相比，量子数字签名（QDS）提供了更高的安全性。目前，它的性能受到密钥生成协议的限制，这些协议在信道容量方面受到根本限制。基于双场量子密钥分配的思想，本文提出了一个双场量子密钥分配协议，并给出了相应的安全性分析。在其分发阶段，采用了一种特定的密钥生成协议，即发送或不发送双字段协议。此外，我们提出了一个系统的模型来评估QDS协议的性能，并比较我们的协议的性能与其他典型的QDS协议。数值仿真结果表明，与现有的协议相比，新协议具有突出的安全性和实用性。因此，我们的协议铺平了道路，走向现实世界的应用QDS。
Digital signature is a key technique in information security, especially for identity authentications. Compared to classical correspondence, quantum digital signatures (QDSs) provide a considerably higher level of security. At present, its performance is limited by key generation protocols, which are fundamentally limited in terms of channel capacity. Based on the idea of twin-field quantum key distribution, this Letter presents a twin-field QDS protocol and details a corresponding security analysis. In its distribution stage, a specific key generation protocol, the sending-or-not-sending twin-field protocol, has been adopted. Besides, we present a systematic model to evaluate the performance of a QDS protocol and compare the performance of our protocol to other typical QDS protocols. Numerical simulation results show that the new protocol exhibits outstanding security and practicality compared to other existing protocols. Therefore, our protocol paves the way toward real-world applications of QDSs.