True random password generation device based on vertical cavity surface emitting laser

Abstract

The invention provides a true random password generation device based on a vertical cavity surface emitting laser. A driving current source loads a periodic electric signal to the vertical cavity surface laser, and the vertical cavity surface laser is periodically turned on and off to acquire a periodic laser signal. A noise signal source loads a noise signal to the vertical cavity surface emitting laser to form weak perturbation on the periodic electrical signal amplitude. The vertical cavity surface emitting laser periodically and randomly keeps in an x or y polarization mode. Random polarization laser emitted by the vertical cavity surface emitting laser enters a polarization beam splitter through a polarization controller. The polarization controller is adjusted, so that the polarization laser coincides with two orthogonal base vector directions of a crystal in the polarization beam splitter. The polarization laser is divided into two ways by taking two orthogonal base vector directions as reference, wherein x polarization laser is output in one way, and y polarization laser is output in the other way. Two laser signals in a single polarization mode are two complementary true random password sequences. The response time of the device is up to 100 fs. The device has the ability to produce true random passwords of dozens or even hundreds of Gbit/s in real time to ensure the safety 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...

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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 a

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