QKD post-processing system and method based on CRC-SCL decoding algorithm

A technology of CRC-SCL and decoding algorithm, applied in the field of QKD post-processing system, can solve problems such as coordination error correction algorithm optimization, and achieve the effect of improving security, improving data coordination efficiency, and improving quantum key generation rate

Pending Publication Date: 2022-04-29
SOUTH CHINA NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method does not specifically opti

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  • QKD post-processing system and method based on CRC-SCL decoding algorithm
  • QKD post-processing system and method based on CRC-SCL decoding algorithm
  • QKD post-processing system and method based on CRC-SCL decoding algorithm

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Embodiment 1

[0070] Such as figure 1 and figure 2 As shown, a QKD post-processing system based on CRC-SCL decoding algorithm includes a sending end and a receiving end; the sending end includes a first information interaction unit, a first parameter estimation unit, a first error correction unit and a first A confidential amplification unit, the first information interaction unit, the first parameter estimation unit, the first error correction unit and the first privacy amplification unit are sequentially connected; the receiving end includes a second information interaction unit, a second parameter estimation unit, a second Two error correction units and a second security amplification unit, the second information interaction unit, the second parameter estimation, the second error correction unit and the second privacy amplification unit are sequentially connected;

[0071] The data coordination includes error correction and security amplification process;

[0072] The first informatio...

Embodiment 2

[0074] Such as image 3 Shown, a kind of QKD postprocessing method based on CRC-SCL decoding algorithm comprises the following steps:

[0075] S1: The first information interaction unit and the second information interaction unit perform information interaction, the sender first sends qubits through the quantum channel, and records the original key K Ra , the receiving end receives qubits and obtains the original key K Rb ;

[0076] The receiving end publishes the time when the quantum is detected, the first information interaction unit and the second information interaction unit perform base vector comparison and time comparison, and discard the key bits corresponding to the time when the base vector comparison unit at the receiving end does not receive the quantum, and according to the selection The content of the quantum key distribution protocol retains the available key; the key bits reserved by the sender and the receiver in this process respectively form the sender’s ...

Embodiment 3

[0115] Such as figure 1 and figure 2 As shown, a QKD post-processing system based on CRC-SCL decoding algorithm includes a sending end and a receiving end; the sending end includes a first information interaction unit, a first parameter estimation unit, a first error correction unit and a first A confidential amplification unit, the first information interaction unit, the first parameter estimation unit, the first error correction unit and the first privacy amplification unit are sequentially connected; the receiving end includes a second information interaction unit, a second parameter estimation unit, a second Two error correction units and a second security amplification unit, the second information interaction unit, the second parameter estimation, the second error correction unit and the second privacy amplification unit are sequentially connected;

[0116] The data coordination includes error correction and security amplification process;

[0117] The first informatio...

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Abstract

The invention provides a QKD post-processing system and method based on a CRC-SCL decoding algorithm, the system comprises a sender and a receiver, the sender comprises an information interaction unit, a parameter estimation unit, an error correction unit and a confidential amplification unit; the receiver comprises an information interaction unit, a parameter estimation unit, an error correction unit and an amplification unit. According to the continuous variable quantum key distribution characteristic, performance characteristics of error correction codes with different code lengths are combined, on the basis of classical multilateral LDPC code multidimensional negotiation, the polarization codes are introduced for cascade decoding, the excellent error correction performance of the polarization codes based on the CRC-SCL decoding algorithm in medium and short code lengths is fully utilized, and finally decoding is completed. According to the method, the data coordination efficiency is improved, the error correction efficiency is guaranteed, the quantum key generation rate of the QKD system is further improved, and the overall performance of the system is guaranteed.

Description

technical field [0001] The present invention relates to quantum information and optical communication technology, more specifically, to a QKD post-processing system and method based on CRC-SCL decoding algorithm. Background technique [0002] Quantum Key Distribution (QKD) is an important branch of quantum cryptography, which uses single photons, entangled photons, and coherent light fields as carriers to transmit key information. It enables the legitimate communication parties (the sender is called Alice, and the receiver is called Bob) to share a set of keys that are theoretically unconditionally secure. [0003] Quantum key distribution is mainly divided into discrete variable quantum key distribution (Discrete Variable QuantumKey Distribution, DV-QKD) and continuous variable quantum key distribution (Continuous Variable QuantumKey Distribution, CV-QKD). Complex post-processing algorithms, especially data coordination algorithms, have always been an important factor limi...

Claims

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Application Information

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IPC IPC(8): H04L1/00H04L9/08
CPCH04L1/0047H04L1/0061H04L1/0057H04L9/0858Y02D30/70
Inventor 郭邦红张锐胡敏杨帆范啸东
Owner SOUTH CHINA NORMAL UNIVERSITY
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