Multi-function Quantum Cryptography Protocol Based on Bell State

Abstract

Most of the current quantum cryptographic protocols can only perform a single function, and quantum resources are not fully utilized. In this paper, we propose a multi-function quantum cryptographic protocol based on the Bell state. This protocol can perform quantum private query (QPQ), quantum identity authentication (QIA), and quantum key distribution (QKD) functions. In the QPQ function part, this protocol can effectively improve database security and user privacy. In the QIA function part, this protocol can complete a two-way identity authentication function, which can effectively improve the reliability of identity authentication. In the QKD function part, this protocol can complete the key distribution function efficiently and reliably, and can maximize the utilization efficiency of quantum resources. With a rigorous security analysis, we proves that this protocol can defend against JM attacks, entanglement measurement attacks and external attacks.