Grice W P, Evans P G, Lawrie B, Legré M, Lougovski P, Ray W, Williams B P, Qi B, Smith A M
Opt Express. 2015 Mar 23;23(6):7300-11. doi: 10.1364/OE.23.007300.
We present and demonstrate a novel protocol for distributing secret keys between two and only two parties based on N-party single-qubit Quantum Secret Sharing (QSS). We demonstrate our new protocol with N = 3 parties using phase-encoded photons. We show that any two out of N parties can build a secret key based on partial information from each other and with collaboration from the remaining N - 2 parties. Our implementation allows for an accessible transition between N-party QSS and arbitrary two party QKD without modification of hardware. In addition, our approach significantly reduces the number of resources such as single photon detectors, lasers and dark fiber connections needed to implement QKD.
我们提出并演示了一种基于N方单量子比特量子秘密共享（QSS）在两方且仅两方之间分发密钥的新协议。我们使用相位编码光子，以N = 3方演示了我们的新协议。我们表明，N方中的任意两方可以根据彼此的部分信息并在其余N - 2方的协作下构建一个密钥。我们的实现允许在不修改硬件的情况下，在N方QSS和任意两方量子密钥分发（QKD）之间进行便捷转换。此外，我们的方法显著减少了实现QKD所需的诸如单光子探测器、激光器和暗光纤连接等资源的数量。
