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DPS QKD (differential phase shift quantum key distribution) encryption system suitable for GPON (gigabit passive optical network) system

A technology of encryption system and optical network unit, applied in key distribution, which can solve the problems of inability to realize point-to-multipoint key distribution and low system security.

Inactive Publication Date: 2013-01-09
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Abstract
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Problems solved by technology

[0017] For the above-mentioned prior art, the object of the present invention is to provide a kind of DPS QKD encryption system applicable to GPON system, it is aimed at solving existing encryption means and can't realize point-to-multipoint key distribution in GPON system, and the system Technical issues with low security

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  • DPS QKD (differential phase shift quantum key distribution) encryption system suitable for GPON (gigabit passive optical network) system
  • DPS QKD (differential phase shift quantum key distribution) encryption system suitable for GPON (gigabit passive optical network) system

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Embodiment Construction

[0044] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0045] A DPS QKD encryption system suitable for GPON systems, including an optical line terminal OLT and at least one optical network unit ONU, the optical line terminal is composed of a clock synchronization controller, a pulse coherent light source, a 1: n beam splitter, and a phase modulator , adjustable attenuators are connected in sequence, and the optical network unit includes a beam splitter, a beam combiner, a first single photon detector, a second single photon detector, and a data acquisition card; the clock synchronization controller outputs two electrical pulses signal, the first electrical pulse controls the frequency of laser pulses generated by the pulsed coherent light source, and the second electrical pulse controls the acquisition frequency of the data acquisition card in the optical network unit ONU, so that the laser pulses g...

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Abstract

The invention discloses a DPS QKD (differential phase shift quantum key distribution) encryption system suitable for a GPON (gigabit passive optical network) system. The encryption system comprises an OLT (optical line terminal) and at least one ONU (optical network unit), wherein the OLT is formed by connecting a clock synchronization controller, a pulse coherent optical source, a 1:n beam splitter, a phase modulator and an adjustable attenuator in sequence; the ONU comprises a beam splitter, a beam combiner, a first single photon detector, a second single photon detector and a data acquisition card; the clock synchronization controller outputs two channels of electrical pulse signals; the first channel of electrical pulse controls the pulse coherent optical source to generate frequency of laser pulse; and the second channel of electrical pulse controls acquisition frequency of the data acquisition card in the ONU. The point-to-multipoint DPS QKD encryption scheme provided by the invention has the advantages of low cost, simple structure, high key generation rate and stable work performance, can implement point-to-multipoint key distribution and is suitable for the GPON system.

Description

technical field [0001] The present invention relates to the technical field of industrial application of DPS QKD (Differential Phase Shift Quantum Key Distribution), in particular to a DPS QKD encryption system suitable for GPON systems. Background technique [0002] As a new-generation broadband optical access standard, GPON has the advantages of high bandwidth, high efficiency, large coverage, and rich user interfaces, and is regarded by most operators as an ideal solution for broadband access. However, the point-to-multipoint structure of the passive optical network PON system determines that the transmission of its downlink information is broadcast. If the information sent by the optical line terminal OLT to other users can be received at the physical layer, the eavesdropper Eve may eavesdrop on the information of the downlink frame. In the G.983.1 standard formulated by the International Telecommunication Union ITU for the PON system, the OLT uses the 3-byte long key p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08
Inventor 廖进昆段毅邢飞杨晓军唐雄贵
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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