Device and method for producing true random codes

Abstract

An equipment of producing really stochastic code, it comprises many generators of the multi-threshold stochastic code and the data processors, the noise generators connect with every generators of the multi-threshold stochastic code respectively that consist of many units of the generators of the multi-threshold stochastic code, every generators of the multi-threshold stochastic code connect with the data processors. The way to produce the really stochastic code: get the list of the really stochastic code discriminate the stochastic level signal from the noise generators by the generator of multi-threshold stochastic code, then in every cycle, get one digit in each list of the stochastic code that produce by the units of the generators of multi-threshold stochastic code, incorporate them to a binary really stochastic code and output it by the data processor. The equipment is getting the output of the really stochastic code by the generator of multi-threshold stochastic code that improves the output rate of the stochastic code and the randomicity. The work of the equipment is stable, the output rate can be extended, the randomicity can improve, and these accord the needs of the quanta secrecy of the really stochastic code.

Description

technical field [0001] The invention relates to the technical field of optical quantum secure communication, in particular to a device for generating a true random code and a method for generating a true random code. Background technique [0002] The function of the true random code generator is to generate a code book that will never be repeated, ensuring that the one-time pad is absolutely unbreakable. The quantum channel of quantum secure communication is not used to transmit ciphertext or plaintext, but to establish and transmit codebook. To complete the entire quantum communication process, two communication channels are required, one is a quantum channel for transmitting quantum keys; the other is a classical channel for key verification and ciphertext transmission. Due to its physical principles, quantum channels cannot be tapped. However, the two processes carried out through the classical channel are not absolutely untappable. When verifying the key, the announce...

AI Technical Summary

Problems solved by technology

Traditional random code generators use noise signals as random sources, and output random codes through a single-threshold discriminator. Although it is easy to implement and fast, it is difficult to control and maintain stability due to various statistical characteristics of noise. The randomness of the code is poor

The quantum random source is a completely random source that never repeats. Although it has neither rules nor repeats, it is difficult to collect data and the equipment is complicated. At the same time, the stability and generation rate of the quantum random source are far from quantum secrecy. Requirements, and affected by factors such as interference noise, the randomness of the actual random code is far less than the ideal value of the theoretical value

For example, quantum security system experiments usually use single photons as a random source. Although the randomness is good, this method is limited by stability and speed, and it is still in the laboratory stage. The correlation coefficient is not ideal, even greater than 0.05. That is, the upper limit of irrelevance is exceeded, and the output random code can be considered to be correlated

[0019] In order to achieve the practical stage of quantum secure communication, random code generators with good randomness, stable operation and low energy consumption are needed. However, it is difficult for the random code generators mentioned above to meet these requirements at the same time.

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