Error correction method for multi-party quantum secret sharing system
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A quantum secret and shared system technology, applied in photonic quantum communication and key distribution, can solve problems such as bit error, optical loss, and failure to realize error correction, and achieve the effect of improving error correction efficiency, high reliability, and less exposed information
Active Publication Date: 2017-02-22
ZHEJIANG SHENZHOU QUANTUM NETWORK TECH CO LTD
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[0021] The purpose of the present invention is to avoid the shortcomings of the above-mentioned prior art, to propose an error correction method with high reliability and high error correction efficiency, which can be applied to multi-party quantum secret sharing systems, to solve complex photon sequence transmission, There are problems of optical loss, bit error and error correction in the processing process
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Embodiment 1
[0072] In this embodiment, the sending end is Alice, and there are two receiving ends, Bob and Charlie respectively.
[0073] The Alice end is used to form the original key KAB and KAC, and performs a logical operation KA=KAB⊕KAC on the formed original key KAB and KAC to obtain the initial key KA.
[0074] Alice sends the original keys KAB and KAC to Bob and Charlie respectively, and gets the corresponding received results KB and KC as shared keys;
[0075] The error correction unit is used to perform tripartite error correction on the KB and KC of the original key received by the Bob end and Charlie end, and the original key KA of the sending end, so that KA after error correction = KB⊕KC.
[0076] The error correction unit in this embodiment can be realized by hardware or software installed on the hardware.
[0077] The scheme of the present application is specifically developed below in order to more clearly illustrate and illustrate the technical scheme of the present app...
Embodiment 2
[0135] This embodiment provides an error correction method for multi-party quantum key sharing.
[0136] 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.
[0137]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.
[0138] In addition, it should be noted that the calculation of the per...
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Abstract
The invention relates to an error correction method for a multi-party quantum secret sharing system. The error correction method comprises the following steps: S1: calculating a system error rate; S2: according to the system error rate, finding the optimal segment length sequence; S3: performing the following steps through loop iteration: S3.1: rearranging data; S3.2: according to the optimal segment length, segmenting an original key of a transmitter and a shared key; calculating parity check sums of segment keys at a transmitting end and a receiving end respectively, and comparing operational results of the transmitting end and the receiving end to obtain the segment keys with different operational results; S3.3: finding error bit positions by a Winnow error correction algorithm; S3.4: according to the error bit positions, negating 0 or 1 values at corresponding positions in the original key of the transmitter, and stopping loop iteration till the maximum number of iterations is reached; S4: checking error correction results; if error correction is successful, ending operation; if the error correction is not successful, discarding the corresponding keys. The invention provides the error correction method which is high in reliability and high in error correction efficiency and is applicable to the multi-party quantum secret sharing system.
Description
technical field [0001] The 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 secret sharing system. Background technique [0002] In some occasions, in order to allow multiple people to bear the risk of protecting secret information, or to strengthen the confidentiality of a certain secret information, multiple participants need to participate in the protection of secret information. For example, the control and launch of missiles, the passage of important places, and the entry into force of wills must be attended by two or more people at the same time to take effect, that is, secrets need to be distributed to multiple people for joint management. This situation can be achieved by splitting secret information into several parts and jointly managed by several participants. This method of protecting information is called s...
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Patent Type & Authority Applications(China)
IPC IPC(8): H04L9/08H04B10/70
Inventor 富尧任鹏飞卢阳
Owner ZHEJIANG SHENZHOU QUANTUM NETWORK TECH CO LTD
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