An ultrafast real-time optical true random pattern generator

Abstract

The invention discloses an ultrafast real-time optical true random pattern generator, which loads an ultrashort optical pulse sequence output by a mode-locking pulse laser to a control signal input end of an all-optical switch; meanwhile, a continuous chaos optical signal output by a laser chaos entropy source is input by a detection signal end of the all-optical switch, the all-optical switch finishes the downsampling of the chaos optical signal, and the optical pulse sequence is output; after sampling is carried out and a chaos optical pulse sequence is obtained to filter idle noise, the chaos optical pulse sequence is converted into a chaos electrical pulse sequence via a photoelectric detector, and the chaos electrical pulse sequence is loaded to the positive terminal of a differential comparator; a voltage signal output by a tunable constant voltage source serves as the negative terminal of the differential comparator; when the peak voltage of the chaos electrical pulse is greater than comparison voltage, the differential comparator outputs a high level "1" code, and otherwise, a low level "0" code is output, and the continuous and random high and low level forms a high-speed real-time optical true random code sequence. The real-time code rate is as high as 10 Gb / S order, and a current high-speed secret communication requirement is greatly met.

Description

technical field [0001] The invention relates to a true random pattern generator, in particular to an ultrafast real-time optical true random pattern generator used in the field of information security and confidential communication. Background technique [0002] Random codes are widely used in the field of secure communication. The generation of safe and reliable random codes is related to many aspects such as national defense security, financial stability, commercial confidentiality and personal privacy. [0003] In secure communication, a random code is generally used as a key to encrypt plaintext information to ensure the security and reliability of the transmitted information. Absolutely confidential communication must rely on the "one-time pad" technology proposed by Shannon. The basic idea is to use non-deterministic random passwords to encrypt plaintext information "one-to-one" or even "many-to-one", requiring that the password be used only once and the length of th...

AI Technical Summary

Problems solved by technology

[0009] The purpose of the present invention is to provide a kind of ultra-fast real-time optical true random pattern generator, in order to solve the ubiquitous problem of insufficient real-time code rate in the above-mentioned existing true random code generation technology

Images