How to verify identity in the continuous variable quantum system?

• Main Authors: Li, L.-Z (Author), Wan, H. (Author), Zhao, X.-Q (Author)
• Format: Article
• Language: English
• Published: Springer 2023
• Subjects: Continuous variable quantum cryptography; Continuous variables; Decoy state; Identification protocol; Quantum cryptography; Quantum identifications; Quantum optics; Security; Teleportation; The two-mode squeezed vacuum state; Two-mode squeezed vacuum state; Verify identity
• Online Access: View Fulltext in Publisher; View in Scopus

 Continuous variable quantum cryptography has developed rapidly in recent decades, but how to verify identity in the continuous variable quantum system is still an urgent issue. To solve this problem, we propose a continuous variable quantum identification (CV-QI) protocol based on the correlation of the two-mode squeezed vacuum state and the continuous variable teleportation. The bidirectional identity verification between two participants of the communication can be achieved by the proposed CV-QI protocol. To guarantee the security, we make full use of the decoy state sequences during the whole process of the proposed CV-QI protocol. Besides, we provide the security analyses of the proposed CV-QI protocol, and analyses indicate that the security of the proposed CV-QI protocol is guaranteed. © 2023, The Author(s), under exclusive licence to Springer Science+Business Media, LLC, part of Springer Nature.