Multiparty quantum key distribution system error correction method

A technology of quantum key distribution and error correction method, which is applied in the field of error correction of multi-party quantum key distribution system, which can solve the problems of low reliability, tediousness, and no error correction, so as to achieve system stability and expose information Less, the effect of improving error correction efficiency

Active Publication Date: 2017-02-15
ZHEJIANG SHENZHOU QUANTUM NETWORK TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method is only suitable for two-party error correction and cannot be directly applied to multi-party error correction.
Moreover, this error correction method does not select the optimal segment length, and it needs to continue to loop until the keys of both parties are consistent, which is tedious and cumbersome
[0016] The key distribution process only involves key distribution issues, and does not involve error correction after distribution, nor does it provide corresponding error correction meth

Method used

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  • Multiparty quantum key distribution system error correction method
  • Multiparty quantum key distribution system error correction method
  • Multiparty quantum key distribution system error correction method

Examples

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Embodiment 1

[0068] In this embodiment, the sending end is Alice, and there are two receiving ends, Bob and Charlie respectively.

[0069] Alice is used to send the original key KA to Bob and Charlie respectively. Bob and Charlie respectively receive the original key KA from the sender and obtain the corresponding shared keys KB and KC.

[0070] By correcting the original key KA on the Alice side, the shared key KB and KC on the Bob side, and the shared keys KB and KC on the Charlie side, the original key KA on the Alice side is the same as the shared keys KB and KC on the Bob side, and the shared keys KB and KC on the Charlie side (that is, the error correction is successful Later: KA=KB=KC).

[0071] The error correction unit in this embodiment can be realized by hardware or software installed on the hardware.

[0072] The solution of the present invention is specifically developed below in order to more clearly illustrate and illustrate the technical solution of the present invention,...

Embodiment 2

[0129] This embodiment provides an error correction method for multi-party quantum key sharing.

[0130] Compared with Embodiment 1, the multi-party quantum key distribution system is applied to a multi-party quantum key distribution platform with one sending end and multiple receiving ends, and its working principle is the same as that of Embodiment 1, and will not be repeated here.

[0131] The error correction method is used to correct the original key of the sending end and the shared keys of multiple receiving ends so that the original key of the sending end and the shared keys of multiple receiving ends are the same. Compared with Embodiment 1, the error correction method in this embodiment is applied to a multi-party quantum key distribution platform with one sending end and multiple receiving ends, but its actual algorithm can be deduced from Embodiment 1, and will not be repeated here illustrate.

[0132] In addition, it should be noted that the calculation of the pe...

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Abstract

The invention relates to a multiparty quantum key distribution system error correction method, which comprises the following steps: S1) calculating system error rate; S2) finding an optimal segment length sequence according to the system error rate; S3) carrying out loop iteration execution of the following steps: S3.1) carrying out data rearrangement; S3.2) carrying out segmentation on sender original key and distribution key according to the optimal segment length, calculating odd-even checksum of the segmented key of a sender and a receiver respectively, comparing operation results of the sender and each receiver to obtain the segmented keys, the operation results of which are different; S3.4) through a Winnow error correction algorithm, finding the error bit position; and S3.4) according to the error bit position, carrying out inversion on the 0 or 1 value at the corresponding position in a shared key of each receiver until reaching the largest iteration times and stopping cycle; and S4) checking the error correction result, if each receiver corrects error successfully, ending the operation, and if at least one receiver fails error correction, discarding the corresponding key. The multiparty quantum key distribution system error correction method is high in reliability and error correction efficiency, and can be suitable for multiparty quantum key distribution system error correction.

Description

technical field [0001] The present invention relates to the technical field of quantum communication, in particular to the technical field of quantum key distribution, and in particular to an error correction method for a multi-party quantum key distribution system. Background technique [0002] The security of quantum communication depends on quantum key distribution. Quantum key distribution is based on quantum physics and informatics and is considered to be the most secure encryption method. It requires a quantum channel for transmitting quantum states and a Authenticable (error-free) classical channels for classical interactions. [0003] In multi-party quantum communication, suppose A sends the same data to n receiving ends. If different keys are used, A needs to prepare n strings of keys and send them to the receiving ends respectively. The receiving ends perform error correction respectively, and A needs to use These n strings of keys encrypt the data to be sent. Us...

Claims

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Application Information

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IPC IPC(8): H04L9/08H04L1/00
CPCH04L1/0078H04L9/0852H04L9/0858
Inventor 富尧任鹏飞卢阳
Owner ZHEJIANG SHENZHOU QUANTUM NETWORK TECH CO LTD
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