Based on the intrinsic randomness of quantum mechanics, quantum random number generators (QRNGs) can produce true random numbers in theory. However, in realistic scenarios, the physical devices of QRNGs may have imperfections or be controlled by some malicious parties, which threatens the security of QRNGs. We experimentally study the security of superluminescent LED (SLED)-based QRNGs under different working conditions. The experimental results show that the output characteristics and performance of the QRNG are affected by the temperature and drive current variations. The higher the drive current of SLED, the greater the influence of temperature variation on the security of the QRNG. Therefore, it is important for the user to choose an appropriate current to drive the QRNG. In addition, our analysis also shows that the QRNG can be more robust by improving the postprocessing method and by monitoring the output optical power as well as the minimum entropy. Thus, this work provides a reference for the standardization of QRNGs.

中文翻译：

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基于超辐射发光LED的量子随机发生器的安全性实验研究

基于量子力学的内在随机性，量子随机数发生器（QRNG）在理论上可以产生真正的随机数。然而，在现实场景中，QRNG 的物理设备可能存在缺陷或被某些恶意方控制，从而威胁到 QRNG 的安全。我们通过实验研究了基于超辐射发光 LED (SLED) 的 QRNG 在不同工作条件下的安全性。实验结果表明，QRNG 的输出特性和性能受温度和驱动电流变化的影响。SLED 的驱动电流越大，温度变化对 QRNG 安全性的影响就越大。因此，用户选择合适的电流来驱动 QRNG 很重要。此外，我们的分析还表明，通过改进后处理方法和监控输出光功率以及最小熵，QRNG 可以更加稳健。因此，这项工作为 QRNG 的标准化提供了参考。