Abstract
The security of cryptography algorithms is based on the security of the key and the secret key is essentially random number. Pseudo-random numbers based on the complexity of the algorithm can not guarantee the true randomness theoretically. The uncertainty of quantum mechanics provides a perfect source of entropy for the true random number generator. In this paper, we analyze the real-time quantum random number scheme based on quantum phase fluctuation given by YANG et al. On the basis of this scheme, a theoretical model of quantum random number optical interference with two delay coils is designed, and the randomness of the theoretical model is analyzed. The theoretical model obtained has the characteristics of random normal distribution.
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