Regular Article - Quantum Optics
Analysis of the effects of temperature increase on quantum random number generator
State Key Laboratory of Mathematical Engineering and Advanced Computing, 450001, Zhengzhou, Henan, China
2 Henan Key Laboratory of Network Cryptography Technology, 450001, Zhengzhou, Henan, China
Accepted: 15 February 2021
Published online: 24 February 2021
Quantum random number generator (QRNG) relies on the intrinsic randomness of quantum mechanics to produce true random numbers which are important in many fields, such as cryptographic protocols, security applications and Monte Carlo simulations. Recently, QRNGs with semiconductor light source have attracted a lot of attention due to their operational simplicity and high generation rate. However, the output characteristics of the light source in QRNG may be affected by temperature variations, which impacts the performance of QRNG. In this work, we study the effects of temperature increase on the super-luminescent emitting diode (SLED)-based QRNG with a numerical method. The results show that the temperature increase in SLED leads to the decrease of min-entropy. When the temperature is higher than some threshold value, the output sequence cannot pass the NIST Statistical Test. Our analysis also shows that the QRNG can be more robust by improving the post-processing method and monitoring the temperature as well as the min-entropy and thus provides a reference for the standardization of QRNG.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2021