论文标题
安全证明针对实验可行的半句号键分配协议的集体攻击
Security Proof Against Collective Attacks for an Experimentally Feasible Semiquantum Key Distribution Protocol
论文作者
论文摘要
Semiquantum密钥分布（SQKD）允许两个方（Alice和Bob）创建一个共享的秘密密钥，即使这些当事方（例如，爱丽丝）是经典的，但是，大多数SQKD协议使用光子实施时都会出现严重的实际安全问题。最近开发的“镜像协议” [Boyer，Katz，Liss和Mor，Phys。 Rev. A 96，062335（2017）]是一种实验可行的SQKD协议，克服了这些缺点。镜像协议被证明是可靠的（即，它被证明是在包括所有无噪声攻击（包括所有无噪声攻击）的有限攻击中被证明是安全的，但是如果允许某些噪音（自然或由于窃听）的安全性，尚未证明其安全性。在这里，我们证明了镜像协议对广泛的量子攻击（“集体攻击”）的安全性，并评估了允许的噪声阈值和最终的关键率。
Semiquantum key distribution (SQKD) allows two parties (Alice and Bob) to create a shared secret key, even if one of these parties (say, Alice) is classical. However, most SQKD protocols suffer from severe practical security problems when implemented using photons. The recently developed "Mirror protocol" [Boyer, Katz, Liss, and Mor, Phys. Rev. A 96, 062335 (2017)] is an experimentally feasible SQKD protocol overcoming those drawbacks. The Mirror protocol was proven robust (namely, it was proven secure against a limited class of attacks including all noiseless attacks), but its security in case some noise is allowed (natural or due to eavesdropping) has not been proved yet. Here we prove security of the Mirror protocol against a wide class of quantum attacks (the "collective attacks"), and we evaluate the allowed noise threshold and the resulting key rate.
