A new interactive quantum zero-knowledge protocol for identity authentication implementable in currently available quantum cryptographic devices is proposed and demonstrated. The protocol design involves a verifier and a prover knowing a pre-shared secret, and the acceptance or rejection of the proof is determined by the quantum bit error rate. It has been implemented in modified Quantum Key Distribution devices executing two fundamental cases. In the first case, all players are honest, while in the second case, one of the users is a malicious player. We demonstrate an increase of the quantum bit error rate around 25% in the latter case compared to the case of honesty. The protocol has also been validated for distances from a back-to-back setup to more than 60 km between verifier and prover. The security and robustness of the protocol has been analysed, demonstrating its completeness, soundness and zero-knowledge properties.

翻译：提出并演示了一种可在当前量子密码设备中实现的交互式量子零知识身份认证协议。该协议设计涉及验证者和知晓预共享秘密的证明者，并通过量子比特误码率确定证明的接受或拒绝。该协议已在改进的量子密钥分发设备中实现，执行两种基本情形：第一种情形中所有参与者均诚实，第二种情形中有一方为恶意参与者。我们证明，与诚实情形相比，后者的量子比特误码率提升了约25%。该协议还针对从背靠背配置到验证者与证明者之间超过60公里的距离进行了验证。我们分析了协议的安全性与鲁棒性，证明了其完备性、可靠性及零知识特性。