Security of a High Dimensional Two‐Way Quantum Key Distribution Protocol
Security of a High Dimensional Two‐Way Quantum Key Distribution Protocol
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DOI：
10.1002/qute.202200024
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发表时间：
2022-03
影响因子：
4.4
通讯作者：
Walter O. Krawec
中科院分区：
文献类型：
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作者：
Walter O. Krawec
双向量子密钥分发（QKD）协议利用双向量子通信来建立共享密钥。由于攻击面增加，安全分析仍然具有挑战性。本文研究了乒乓协议的高维变体，并进行了有限密钥设置下的信息理论安全性分析。这项工作的主要贡献是展示了一种新的双向量子密钥分发协议的证明方法，该方法基于2010年引入的Bouman和Fehr的量子采样框架，以及作者在2019年引入的基于采样的熵不确定性关系。乒乓协议仅在这里进行了研究，但这些方法可能广泛适用于其他QKD协议，特别是那些依赖于双向通道的协议。在此过程中，还展示了将高维量子态应用于双向量子通信的一些令人着迷的好处。
Two‐way quantum key distribution (QKD) protocols utilize bi‐directional quantum communication to establish a shared secret key. Due to the increased attack surface, security analyses remain challenging. Here a high‐dimensional variant of the Ping Pong protocol is investigated and an information theoretic security analysis in the finite‐key setting is performed. The main contribution in this work is to show a new proof methodology for two‐way quantum key distribution protocols based on the quantum sampling framework of Bouman and Fehr introduced in 2010 and also sampling‐based entropic uncertainty relations introduced by the authors in 2019. The Ping Pong protocol is only investigated here, but these methods may be broadly applicable to other QKD protocols, especially those relying on two‐way channels. Along the way, some fascinating benefits to high‐dimensional quantum states applied to two‐way quantum communication are also showed.