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High-speed physical key distribution system and method based on multimode laser chaotic synchronization

A key distribution system and chaotic synchronization technology, applied to key distribution, can solve the problem of limited synchronization recovery time of the key distribution scheme, achieve the effect of improving the key distribution rate, increasing complexity, and avoiding the limitation of recovery time

Active Publication Date: 2020-05-12
TAIYUAN UNIV OF TECH
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Problems solved by technology

[0007] In order to solve the problem that the key distribution scheme based on chaotic synchronization is limited by the synchronization recovery time, the present invention proposes a high-speed physical key distribution method based on multi-mode laser chaotic synchronization and system

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  • High-speed physical key distribution system and method based on multimode laser chaotic synchronization

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Embodiment Construction

[0024] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, rather than All the embodiments; based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative work all belong to the protection scope of the present invention.

[0025] Such as figure 1As shown, the embodiment of the present invention provides a high-speed physical key distribution system based on multi-mode laser chaotic synchronization, including a superluminescent light-emitting diode 1 that can emit broadband light, a first light splitting element 5, a first polarization controller 6a, Second polarization controller 6b, first adjustable attenuator 8a, second adjustable a...

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Abstract

The invention belongs to the technical field of secret communication, provides a high-speed physical key distribution system and method based on multimode laser chaotic synchronization, and aims to solve the problems that an existing key distribution scheme is poor in safety or low in distribution rate. According to the system, broadband signals generated by a super-radiation light-emitting diodeare used for driving a multimode laser to be synchronized, two communication parties utilize tunable filters to filter out two modes respectively, output of one mode is independently and randomly keyed, when keyed signals of the two communication parties are the same, the chaotic signals outputted by the two parties are synchronized, otherwise, the two parties are not synchronized. The state of the chaotic signals is not changed so that the limitation of synchronous recovery time on the existing key distribution rate is avoided, a safe and high-speed key distribution scheme is provided for absolute safe secret communication, and the system and the method can be applied to the field of secret communication.

Description

technical field [0001] The invention belongs to the technical field of secure communication, and in particular relates to a high-speed physical key distribution system and method based on chaotic synchronization of multi-mode lasers. Background technique [0002] Confidential communication is related to national stability, social security, privacy protection and many other aspects. Absolutely safe confidential communication is the goal pursued by human society. [0003] Absolutely secure confidential communication needs to meet the "one-time pad" theory proposed by Shannon: use a completely random key with a length not shorter than the length of the plaintext to encrypt the plaintext, and the key is used only once. Therefore, in order to realize unconditionally secure confidential communication, two conditions need to be met: (1) be able to generate random keys at high speed; (2) be able to realize high-speed and secure key distribution. Therefore, it is an important resea...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04L9/00
CPCH04L9/0819H04L9/001
Inventor 王安帮高华王龙生郭园园王云才
Owner TAIYUAN UNIV OF TECH
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