A remarkable aspect of quantum theory is that certain measurement outcomes are entirely unpredictable to all possible observers. Such quantum events can be harnessed to generate numbers whose randomness is asserted based upon the underlying physical processes. We formally introduce, design, and experimentally demonstrate an ultrafast optical quantum random number generator that uses a totally untrusted photonic source. While considering completely general quantum attacks, we certify and generate in real time random numbers at a rate of $8.05\mathrm{Gb}/\mathrm{s}$ with a composable security parameter of ${10}^{-10}$. Composable security is the most stringent and useful security paradigm because any given protocol remains secure even if arbitrarily combined with other instances of the same, or other, protocols, thereby allowing the generated randomness to be utilized for arbitrary applications in cryptography and beyond. This work achieves the fastest generation of composably secure quantum random numbers ever reported.

中文翻译：

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来自不受信任的光的认证量子随机数

量子理论的一个显着方面是某些测量结果对于所有可能的观察者都是完全不可预测的。可以利用这种量子事件来生成数字，这些数字的随机性是根据基础物理过程确定的。我们正式介绍，设计和实验演示了一种使用完全不受信任的光子源的超快光学量子随机数发生器。在考虑完全通用的量子攻击时，我们以每秒$8.05\mathrm{千兆位}/\mathrm{s}$ 具有可组合的安全性参数为 ${10}^{-10}$。可组合安全性是最严格和最有用的安全性范式，因为即使给定协议与同一协议或其他协议的其他实例任意组合，该协议仍然保持安全性，从而使生成的随机性可用于密码学及其以外的任意应用程序。这项工作实现了有史以来最快的可组合安全量子随机数生成。