We introduce a quantum key distribution protocol designed to expose fake users that connect to Alice or Bob for the purpose of monopolising the link and denying service. It inherently resists attempts to exhaust Alice and Bob’s initial shared secret and is 100% efficient, regardless of the number of qubits exchanged above the finite key limit. Additionally, secure key can be generated from two-photon pulses without having to make any extra modifications. This is made possible by relaxing the security of BB84 to that of the quantum-safe block cipher used for day-to-day encryption, meaning the overall security remains unaffected for useful real-world cryptosystems such as AES-GCM being keyed with quantum devices.

中文翻译：

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用于快速拒绝服务检测的量子密钥分发协议

我们引入了一种量子密钥分发协议，该协议旨在暴露连接到Alice或Bob的虚假用户，以垄断链接和拒绝服务。它固有地抵制了用尽Alice和Bob最初的共享秘密的企图，并且无论交换的量子位数量超过了有限键限制，它的效率都是100％。此外，可以从双光子脉冲生成安全密钥，而无需进行任何其他修改。通过将BB84的安全性放宽到用于日常加密的量子安全块密码的安全性，这是可能的，这意味着整体安全性对于使用密码设备加密的AES-GCM等有用的现实世界密码系统不受影响。 。