High-speed physical key distribution system and method based on chaotic synchronization of multi-mode lasers
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: 2022-05-13
TAIYUAN UNIV OF TECH
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[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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[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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The invention belongs to the technical field of secure communication. Aiming at the problems of poor security or low distribution rate in existing key distribution schemes, a high-speed physical key distribution system and method based on multi-mode laser chaotic synchronization are proposed. The system uses the broadband signal generated by superluminescent light-emitting diodes to drive multi-mode lasers to synchronize. Both parties use tunable filters to filter out two modes, and independently and randomly key the output of one of the modes. When the keying signals of both parties are the same , the chaotic signals output by both sides are synchronized, otherwise, they are not synchronized. The present invention does not change the state of the chaotic signal, so it avoids the limitation of the synchronization recovery time on the existing key distribution rate, and provides a safe and high-speed key distribution scheme for absolutely safe confidential communication, which can be applied to the field of secure 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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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