Zhang Kejia, Zhao Xu, Zhang Long, Tian Guojing, Song Tingting
School of Mathematical Science, Heilongjiang University, Harbin 150080, China.
State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876, China.
Entropy (Basel). 2021 Sep 30;23(10):1294. doi: 10.3390/e23101294.
Quantum dual-signature means that two signed quantum messages are combined and expected to be sent to two different recipients. A quantum signature requires the cooperation of two verifiers to complete the whole verification process. As an important quantum signature aspect, the trusted third party is introduced to the current protocols, which affects the practicability of the quantum signature protocols. In this paper, we propose a quantum dual-signature protocol without arbitrator and entanglement for the first time. In the proposed protocol, two independent verifiers are introduced, here they may be dishonest but not collaborate. Furthermore, strongly nonlocal orthogonal product states are used to preserve the protocol security, i.e., no one can deny or forge a valid signature, even though some of them conspired. Compared with existing quantum signature protocols, this protocol does not require a trusted third party and entanglement resources.
量子双签名意味着两个已签名的量子消息被组合起来，并预期发送给两个不同的接收者。量子签名需要两个验证者的协作来完成整个验证过程。作为量子签名的一个重要方面，当前的协议引入了可信第三方，这影响了量子签名协议的实用性。在本文中，我们首次提出了一种无需仲裁者和纠缠的量子双签名协议。在所提出的协议中，引入了两个独立的验证者，这里他们可能不诚实但不会相互勾结。此外，使用强非局域正交积态来保证协议的安全性，即即使他们中的一些人合谋，也没有人能够否认或伪造有效签名。与现有的量子签名协议相比，该协议不需要可信第三方和纠缠资源。
