Cross-layer encryption method for fiber transmission system and cross-layer encryption system

A technology of optical fiber transmission and encryption method, applied in the field of communication, can solve the problems of low speed, code word cracking, and can not guarantee security, etc., and achieve the effect of increasing capacity, improving security, and broad application prospects.

Active Publication Date: 2016-11-23
SHENZHEN UNIV
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Problems solved by technology

Quantum cryptography communication based on the physical "uncertainty" and "inseparable" principles has absolute security, but due to the limitation of physical mechanism, the current quantum communication technology is only suitable for low-sp

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  • Cross-layer encryption method for fiber transmission system and cross-layer encryption system
  • Cross-layer encryption method for fiber transmission system and cross-layer encryption system
  • Cross-layer encryption method for fiber transmission system and cross-layer encryption system

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[0039] figure 1 It is the cross-layer encryption system architecture proposed by the present invention. The user data is first encrypted by an encryption algorithm, converted into ciphertext data, and then passed through an optical transmitter and an optical encoder to perform optical encryption at the physical layer, and finally, coupled to the optical fiber for optical fiber transmission. For the traditional data encryption optical fiber transmission system, user data is encrypted by an encryption algorithm, and then optically modulated directly for optical fiber transmission. In this way, in the optical fiber transmission link, eavesdropping on the data "0" and "1" of the user can directly Detection, that is, the physical layer signal (ciphertext) can be correctly obtained. The difference between the cross-layer encryption system proposed by the present invention is that at the transmitting end, the user encrypts the data also requires a pulsed optical transmitter and an opt...

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Abstract

The invention provides a cross-layer encryption method for a fiber transmission system and a cross-layer encryption system. The cross-layer encryption method comprises steps of data encryption, light coding, light decoding, recovery and data decryption. The cross-layer encryption method is advantaged in that for an eavesdropping user, both light coding encryption and data encryption at a physical layer must be cracked, so safety of a fiber transmission system in the prior art is improved, moreover, through the OCDMA multi-access/reuse technology of the physical layer, a multi-user transmission system is realized, capacity of the fiber transmission system is improved, and the cross-layer encryption method is especially suitable for safe transmission of the important information of light transmission networks and access networks of special mechanisms including police, bank and government occasions, and has urgent market demands and wide application prospects.

Description

technical field [0001] The invention relates to the technical field of communication, in particular to a cross-layer encryption method and system of an optical fiber transmission system. Background technique [0002] The current optical cable is easy to be eavesdropped, and the security problem of optical information transmission in the optical fiber communication system needs to be solved urgently. The safe transmission of optical information requires that its communication system has good security, and it should have the functions of anti-destruction, anti-interception, anti-attack, identity authentication and concealment. [0003] Traditional optical network security employs data encryption in upper-layer protocols of the network and assumes that the physical layer provides unimpeded and error-free transmission. However, all algorithm-based encryption methods have been proven to be broken. For example, in 2009, research teams in Japan, France and Germany broke the 768-b...

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Application Information

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IPC IPC(8): H04B10/85H04J14/00H04L29/06
CPCH04B10/85H04J14/005H04L63/0428
Inventor 吉建华李文俊王可徐铭张志朋杨淑雯
Owner SHENZHEN UNIV
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