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Ultrafast full-optical true random number generating method

A technology of true random numbers and generation methods, applied in random number generators and other directions, can solve problems such as insufficient code rate, and achieve the effect of overcoming technical limitations, overcoming additional structural problems, and reducing requirements

Active Publication Date: 2015-03-25
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0006] The purpose of the present invention is to provide an ultra-fast all-optical true random number generation method to solve the problems such as insufficient code rate in the above-mentioned prior art, and to be suitable for modern secure communication and large-scale parallel computing

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Embodiment Construction

[0027] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings, but this implementation example should not be construed as limiting the present invention.

[0028] Implement a kind of ultra-fast all-optical true random number generation method that the above-mentioned provision of the present invention provides, and its described method is to carry out according to the following steps:

[0029] Step 1. The pulse width output by the active mode-locked pulsed laser is about 1.7ps, and the repetition rate is f =10 GHz, ultrashort optical pulse sequence with a wavelength of 1550 nm, after the action of the pulsed optical amplifier, its peak power can be increased to 2 kW. The ultrashort pulse signal is used as the pump source to enter a section of 5 m long high nonlinear dispersion shifted fiber with a nonlinear coefficient of 25 / W / km through a polarization maintaining fiber. The zero dispersion point is l...

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Abstract

The invention provides an ultrafast full-optical true random number generating method. An optical device is utilized for generating ultra-short pulse sequences, spectrum cutting is performed so that narrowband ultra-short pulse sequences can be obtained, then, power adjustment is performed so that the average powers of the paths of sequences can be the same, the sequences are converted into different pulse states, next, equal-difference delay is performed on N paths of parallel true random codes so that equal delay amount exists between every two adjacent paths of true random pulse sequences, and finally the time-division multiplexing is performed on ultrafast full-optical true random number sequences with the code generating rate being N*f. According to the method, high-speed true random numbers are generated through a time-division multiplexing technology, the requirement for entropy source bandwidth is lowered, the speed of the time-division multiplexing technology can reach the Tbps magnitude, the speed of the time-division multiplexing technology is increased by three magnitude orders compared with that of an existing true random number generating technology, and the requirement for modern high-speed secret communication safety is met.

Description

technical field [0001] The invention relates to a method for generating all-optical true random numbers, which belongs to the field of information technology. It is a method for generating ultra-high code rate true random number sequences. It is mainly used in secure communication and large-scale parallel computing to quickly generate Safe and reliable true random number or key. Background technique [0002] In the field of secure communication, the rapid generation of safe and reliable random numbers (also known as keys) is related to national defense security, financial stability, commercial confidentiality, personal privacy and many other aspects. [0003] In secure communication, random numbers are generally used as keys to encrypt plaintext information. As long as the key is not cracked, the security of the transmitted information is guaranteed. According to Shannon's "one-time pad" theory, absolutely secure confidential communication must meet the following conditions...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F7/58
Inventor 王云才李璞王冰洁张建忠张明江王安帮张建国
Owner TAIYUAN UNIV OF TECH
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