Oversampling high-speed real-time optical true random number generator

Abstract

This invention discloses an oversampling high-speed real-time optical true random number generator. A mode-locking pulse laser outputs ultra-short optical pulse sequence; the ultra-short optical pulse sequence is loaded to a control signal input end of an all-optical switch; continuous chaotic optical signals outputted by a laser chaos entropy source is inputted by a detecting signal end of the all-optical switch; the all-optical switch oversamples the chaotic optical signals; after being sampled, idle noise of obtained chaotic optical pulse sequence is filtered by an optical bandpass filter; the chaotic optical pulse sequence is converted into corresponding chaotic electric pulse signals though a fast photodetector to be inputted to a positive terminal of an eight-bit analog-digital converter; the voltage signal outputted by an adjustable harmonic constant voltage source is used as a comparison voltage to be loaded to a negative terminal of the eight-bit analog-digital converter; at last, a parallel output port of the least significant bit of lower four bits of the eight-bit analog-digital converter outputs four ways of high-speed real-time true random number sequences. The real-time bit rate of the true random number generator reaches more than hundred Gbps; the real-time bit rate of the prior true random number generator is improved 2-3 magnitudes; and the requirement of high-speed secret network is greatly satisfied.

Description

technical field [0001] The invention relates to a true random number generator, in particular to an over-sampling high-speed optical true random number generator used for Monte Carlo simulation, statistical sampling, artificial neural network and secure communication. Background technique [0002] Random numbers are widely used in scientific computing such as Monte Carlo simulation, statistical sampling, and artificial neural networks. Especially in the field of secure communication, the generation of safe and reliable random numbers (keys) is related to national defense security, financial stability, commercial confidentiality, personal privacy and many other aspects. [0003] Shannon, the originator of information theory, confirmed that the "one-time pad" encryption theory is required for absolutely secure confidential communication. This puts forward three conditions for the random number generator: 1) the length of the key is not shorter than the length of the plaintext...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide an oversampling high-speed real-time optical true random number generator to solve the problem of insufficient real-time code rate in the above-mentioned existing true random number generation technology, and to be used in modern cryptography and secure communication, etc. field

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