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Optical fiber quantum key distribution system and control method

A quantum key distribution and quantum key distribution technology, applied in key distribution, can solve the problem that the security key output rate cannot meet the security requirements of information communication

Inactive Publication Date: 2018-07-06
STATE GRID CORP OF CHINA +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the output rate of the security key of the optical fiber quantum key distribution system is restricted by technical factors such as the performance of the quantum key distribution sending unit, the optical channel attenuation, the performance of the quantum key distribution receiving unit, and due to the high-speed quantum key distribution sending unit and The problem of the cost factor of the high-speed quantum key distribution receiving unit, the output rate of the security key cannot meet the increasing security needs of information communication

Method used

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  • Optical fiber quantum key distribution system and control method
  • Optical fiber quantum key distribution system and control method
  • Optical fiber quantum key distribution system and control method

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Experimental program
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Embodiment 1

[0151] Figure 4 It shows a structural diagram of an optical fiber quantum key distribution system whose output code rate is increased by ten times according to an embodiment of the present invention, as shown in Figure 4 As shown, the system may include: a sequentially connected sending end, a channel, and a receiving end; it is characterized in that the sending end includes a sequentially connected serial / parallel conversion unit 1, a quantum key distribution sending unit group 2 and a sending control device 3;

[0152] Said channel comprises an optical cable 4 and an auxiliary communication channel 5;

[0153] The receiving end includes a quantum key distribution receiving unit group 6, a cache and a parallel / serial conversion unit 7 and a receiving controller 8 connected to each other in sequence;

[0154] The sending end is connected to the receiving end through a channel;

[0155] The sending controller 3 is respectively connected with the serial / parallel conversion ...

Embodiment 2

[0172] Provided in this embodiment is an optical fiber quantum key distribution system where N=10 increases the transmission distance without relay and does not reduce the output rate of the security key. The system includes: a sending end, a channel, and a receiving end connected in sequence; it is characterized in that , the sending end includes a serial / parallel conversion unit 1, a quantum key distribution sending unit group 2 and a sending controller 3 connected to each other in sequence;

[0173] Said channel comprises an optical cable 4 and an auxiliary communication channel 5;

[0174] The receiving end includes a quantum key distribution receiving unit group 6, a cache and a parallel / serial conversion unit 7 and a receiving controller 8 connected to each other in sequence;

[0175] The sending end is connected to the receiving end through a channel;

[0176] The sending controller 3 is respectively connected with the serial / parallel conversion unit 1 and the quantum ...

Embodiment 3

[0189] Figure 7 It shows the structural diagram of the optical fiber quantum key distribution system whose output code rate is increased by a hundred times in Embodiment 3 of the present invention, as shown in Figure 7 As shown, the system includes: a sequentially connected sending end, a channel, and a receiving end; it is characterized in that the sending end includes a serial / parallel conversion unit 1, a quantum key distribution sending unit group 2 and a sending controller connected to each other in sequence 3;

[0190] Said channel comprises an optical cable 4 and an auxiliary communication channel 5;

[0191] The receiving end includes a quantum key distribution receiving unit group 6, a cache and a parallel / serial conversion unit 7 and a receiving controller 8 connected to each other in sequence;

[0192] The sending end is connected to the receiving end through a channel;

[0193] The sending controller 3 is respectively connected with the serial / parallel convers...

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Abstract

The invention relates to an optical fiber quantum key distribution system and a control method thereof. The system comprises a transmitting end, a channel and a receiving end, which are sequentially connected, the transmitting end comprises a serial / parallel conversion unit, a quantum key distribution transmitting unit group and a transmission controller, the channel comprises an optical cable andan auxiliary communication channel, the receiving end comprises an quantum key distribution receiving unit group, a buffer, a parallel / serial conversion unit and a receiving controller, which are connected with each other; and the parallel work of N quantum key distribution transmitting units having the same performance, transmission media, quantum key distribution receiving units are controlledby the corresponding controllers, thereby overcoming the limitation problems of technical and cost factors, stably improving the output rate of secure keys of the optical fiber quantum key distribution system without reducing the non-relay transmission distance, and improving the technical performance and practicability of quantum cryptography communication.

Description

technical field [0001] The invention relates to the technical field of optical fiber quantum communication, in particular to an optical fiber quantum key distribution system and a control method. Background technique [0002] Quantum key distribution is one of the important applications of quantum information science. It is mainly used to establish shared security keys for remote communication parties relying on unreliable channels. The key information of this technology is carried by photons. According to Heisenberg Based on the principle of determinism, the attacker cannot obtain all the information of the carrier photon; and because this technology is based on the principle of measurement collapse, once the attacker measures the carrier photon, it will destroy part of the information, which will be discovered by both communication parties; at the same time, The non-cloning principle of this technology ensures that the quantum signal in the channel will not be copied by ea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04B10/70H04B10/25
CPCH04B10/70H04L9/0855H04L9/0858H04B10/25891
Inventor 苗浡瑞苗新
Owner STATE GRID CORP OF CHINA
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