A new true random number generator based on feedback system

A true random number generator (TRNG) often makes use of a non-deterministic source to produce random numbers. It is considered more secure than a pseudo random number generator as the degree of randomness is higher. In this paper, after analyzing the weakness of a TRNG based on mouse movement, we propose a novel TRNG which generates random numbers continuously by a single nondeterministic source dataset based on feedback system. After studying and comparing several chaotic cryptography algorithms, we find that the encryption by algorithm RC4 has a better performance and can be implemented on common PC platform, so RC4 encryption based on chaotic system is selected to be used in processing. At last, the random sequences generated by our method are tested using NIST statistical tests, and a good performance has been achieved. So it is convenient, efficient and low-cost for the personal computer (PC) platform.