A True Random Password Generator Based on Vertical Cavity Surface Emitting Laser

Abstract

A true random password generator based on a vertical cavity surface emitting laser is to drive a current source to load a periodic electrical signal into the vertical cavity surface laser, and periodically turn on and off the vertical cavity surface laser to obtain a periodic laser signal; the noise signal source Loading the noise signal to the vertical cavity surface emitting laser will form a weak disturbance to the amplitude of the periodic electric signal, so that the vertical cavity surface emitting laser will be periodically and randomly maintained at x or y In the polarization mode: the randomly polarized laser light emitted by the vertical cavity surface emitting laser enters the polarization beam splitter through the polarization controller, and the polarization controller is adjusted to make the polarization laser and the two orthogonal base vector directions of the crystal in the polarization beam splitter consistent, and the polarization The laser will be divided into two paths based on two orthogonal base vector directions: one output x Polarized laser, another output y Polarized laser, two laser signals with a single polarization mode, that is, two complementary true random code sequences. The response time of this device is as high as 100 fs, and it has the ability to generate true random passwords of tens or even hundreds of Gbit / s in real time, ensuring the security of digital communication.

Description

technical field [0001] The invention relates to a true random code generating device, in particular to a true random code generating device for a vertical cavity surface emitting laser, which is suitable for the fields of cryptography, optical communication, information security and the like. Background technique [0002] With the rapid development of digital communication, especially the advent of the era of big data, incidents of illegal interception of information and theft of database data have occurred frequently. How to ensure communication security has become extremely important, which is related to national security, financial stability, personal privacy and many other aspects. [0003] The "one-time pad" encryption theory research of Shannon, the originator of information theory, proves that the communication will be absolutely secure only if the password is guaranteed to be completely random, consistent with the length of the information to be encrypted, and used o...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a true random password generator based on a vertical cavity surface emitting laser, which is used to solve the problems of complex structure and insufficient real-time code rate in the existing true random password generation technology, and is used in modern cryptography and high-speed optical communication. and confidential communications

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