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Signal all-optical encryption and decryption key distribution method based on optical fiber wavelength division multiplexing system

A wavelength division multiplexing and key distribution technology, applied in key distribution, can solve the problems of high difficulty and complexity of security assurance, complex key generation unit, etc., achieve strong resistance to information theft, reduce the difficulty of key transmission, The effect of reducing the number of

Active Publication Date: 2013-02-13
XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI +1
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Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide a key distribution method based on all-optical encryption and decryption of signals in an optical fiber wavelength division multiplexing system. In principle, using each optical signal as the encryption key for the encryption of the next optical signal can solve the problem of complex key generation units caused by the large number of encryption scheme keys in the prior art, the difficulty of security guarantee and the difficulty of key transmission during key transmission. high complexity issues

Method used

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  • Signal all-optical encryption and decryption key distribution method based on optical fiber wavelength division multiplexing system
  • Signal all-optical encryption and decryption key distribution method based on optical fiber wavelength division multiplexing system
  • Signal all-optical encryption and decryption key distribution method based on optical fiber wavelength division multiplexing system

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Embodiment Construction

[0030] see figure 1 , the present invention is based on the key distribution method of signal all-optical encryption and decryption in the optical fiber wavelength division multiplexing system:

[0031] 1] Optical signal encrypted transmission

[0032] 1.1] Generate light key pulse sequence K at the encryption end 0 , light key pulse sequence K 0 It is used to encrypt the first optical signal in the multi-channel optical signal;

[0033] 1.2] The first optical signal is used as the encryption key of the second optical signal, and the second optical signal is used as the encryption key of the third optical signal, and so on, to complete all encryption of the multi-channel optical signals;

[0034] 1.3] The light key pulse sequence K 0 Transmission through a secure channel, and the encrypted multi-channel optical signal is transmitted through a public channel;

[0035] Specifically, it refers to using each optical signal as the encryption key when encrypting the next optica...

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Abstract

The invention discloses a signal all-optical encryption and decryption key distribution method based on an optical fiber wavelength division multiplexing system. The signal all-optical encryption and decryption key distribution method comprises the following steps of: 1) performing optical signal encryption transmission, and 2) performing optical signal decryption receiving. By the method, according to the characteristic of the optical fiber wavelength division multiplexing system and a stream cipher system theory, each path of optical signal is used as an encryption key for encrypting the next path of optical signal. The problem that a key generation unit is complicated because of a large number of keys of the encryption scheme and the problems of high security guaranteeing difficulty and high complexity of a key transmission process in the prior art can be solved.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication, and relates to a key distribution method, in particular to a key distribution method based on all-optical encryption and decryption of signals in an optical fiber wavelength division multiplexing system. Background technique [0002] With the mature development of foreign optical fiber eavesdropping technology, the information transmitted in optical fiber faces a huge risk of theft. Encrypting the optical signal transmitted in the optical fiber has become an effective method to solve the problem of information theft after the optical fiber communication system is eavesdropped. At present, the scheme that can be applied to the optical fiber communication system and realize real-time encryption is an all-optical encryption scheme based on the stream cipher system. However, this scheme is a symmetric key system scheme, that is, the encryption key is the same as the decryption key...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08
Inventor 谢小平钱凤臣赵卫段弢段杰胡辉汪伟冯欢
Owner XI'AN INST OF OPTICS & FINE MECHANICS - CHINESE ACAD OF SCI
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