Hacking commercial quantum cryptography systems by tailored bright illumination
Hacking commercial quantum cryptography systems by tailored bright illumination
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DOI：
10.1038/nphoton.2010.214
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发表时间：
2010-10-01
期刊：
影响因子：
35
通讯作者：
Makarov, Vadim
中科院分区：
文献类型：
--
作者：
Lydersen, Lars;Wiechers, Carlos;Makarov, Vadim
量子力学的特殊性质允许两个远程方通信一个私有的秘密密钥，该密钥受到物理定律的保护（1-4）。所谓的量子密钥分发（QKD）实现总是依赖于探测器来测量单光子的相关量子特性（5）。在这里，我们通过实验证明，在两个商用QKD系统中的探测器可以完全远程控制，使用专门定制的明亮照明。这使得有可能无痕地获取完整的秘密密钥，我们提出了一个窃听装置从现成的组件。这个漏洞可能存在于大多数使用雪崩光电二极管检测单个光子的QKD系统中。我们相信，我们的发现对于通过识别和修补技术缺陷来加强实际QKD的安全性至关重要。
The peculiar properties of quantum mechanics allow two remote parties to communicate a private, secret key, which is protected from eavesdropping by the laws of physics(1-4). So-called quantum key distribution (QKD) implementations always rely on detectors to measure the relevant quantum property of single photons(5). Here we demonstrate experimentally that the detectors in two commercially available QKD systems can be fully remote-controlled using specially tailored bright illumination. This makes it possible to tracelessly acquire the full secret key; we propose an eavesdropping apparatus built from off-the-shelf components. The loophole is likely to be present in most QKD systems using avalanche photodiodes to detect single photons. We believe that our findings are crucial for strengthening the security of practical QKD, by identifying and patching technological deficiencies.