Device and method for performing information reconciliation in a quantum key distribution system

A technology for quantum key distribution and execution of information, applied in key distribution

Pending Publication Date: 2021-09-14
HUAWEI TECH DUESSELDORF
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, conventional devices and methods are also disadvantageous in that they require designing, storing and deploying (too) many error correcting codes

Method used

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  • Device and method for performing information reconciliation in a quantum key distribution system
  • Device and method for performing information reconciliation in a quantum key distribution system
  • Device and method for performing information reconciliation in a quantum key distribution system

Examples

Experimental program
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Embodiment Construction

[0060] Figure 10 is a flowchart of the QKD post-processing program 1000 . In front of the eavesdropper 1300 (corresponding to Eve), the transmitting device 1200 (corresponding to user Alice) generates a quantum state, and transmits the quantum state to the receiving device 1100 (corresponding to user Bob )). Hereinafter, the terms "transmission device" and "Alice" will be used interchangeably. Likewise, the terms "receiving device" and "Bob" will also be used interchangeably.

[0061] The receiving device 1100 also measures the transmitted quantum state. Also, the transmitting device 1200 and the receiving device 1100 may generate an original key based on their corresponding quantum states and / or measurement results of the quantum states.

[0062] In addition, for example, when performing post-processing on the data of the QKD system, the transmission device 1200 may perform QKD post-processing (i.e. Figure 10 S1201 in ) and / or the receiving device 1100 can perform QKD ...

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PUM

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Abstract

A device for performing information reconciliation in a Quantum Key Distribution (QKD) system is proposed. The device obtains QKD data. The device further obtains an initial error correction codeword; determines, based on a Signal to Noise Ratio (SNR) and/or Bit Error Rate (BER) of the QKD data, a number of punctures N >= 0 to be performed on the initial error correction codeword; and generates an output error correction codeword by puncturing the initial error correction codeword at N positions. Data in the QKD can thus be smoothly processed even under SNR variations.

Description

technical field [0001] The present invention generally relates to the field of quantum key distribution (Quantum Key Distribution, QKD). More particularly, the present invention relates to an apparatus and method for efficiently performing information coordination in QKD. The invention also relates to a device and method for generating keys based on QKD. Background technique [0002] Conventional QKD post-processing is a process performed on conventional computing devices that converts raw keys into final keys. It generally includes three major steps: parameter estimation, information coordination, and density amplification. [0003] In conventional QKD, based on the signal quality of the QKD data such as SNR or BER, the device performing post-processing uses an error correction code optimized for that operating condition. For example, it may be necessary, or at least (very) desirable, to choose an error correcting code with the greatest error correcting capability that m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08
CPCH04L9/0858
Inventor 付莱德·致衡·冯耶稣·马丁内斯-马特奥维森特·马丁
Owner HUAWEI TECH DUESSELDORF
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