A multi-party quantum secret sharing method and system based on quantum walk

Abstract

The present invention proposes a multi-party quantum secret sharing method and system based on quantum walks. The method includes the following steps: S1: Alice, the secret distributor, first builds a quantum walk subsystem, and executes quantum walks to generate entangled states for secret sharing. ; S2: The secret distributor Alice splits the secret share and distributes it to the participants, and performs wiretapping detection. After passing the eavesdropping detection, the participant measures the particles in his hand; S3: Alice will randomly select a part of the measurement results as a sample for verification, and after the verification is passed, all the original secret messages will be restored. The invention utilizes the principle of quantum walk on the ring to realize the multi-party secret sharing of the quantum walk.

Description

technical field [0001] The invention belongs to the technical field of quantum information sharing, and in particular relates to a quantum walk-based multi-party quantum secret sharing method and system. Background technique [0002] The idea of ​​secret sharing divides the secret in an appropriate way, and each split share is managed by different participants. Unless there are enough authorized participants to cooperate, the secret information cannot be recovered. The purpose of secret sharing is to prevent excessive concentration of secrets, so as to achieve the purpose of dispersing risks and tolerating intrusion. It is an important means in information security and data confidentiality. The key to secret sharing technology is how to better design secret splitting and recovery methods. In 1998, based on the concept of classical secret sharing mechanism, Hillery et al. [1] designed a quantum secret sharing (QSS) scheme using the quantum entanglement correlation of GHZ thr...

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Problems solved by technology

[0004] The existing quantum secret sharing technology still has the following shortcomings: 1) The efficiency of the existing quantum secret sharing needs to be improved: the existing technology generally uses the principle of multi-particle entanglement state to share keys, and this kind of method needs to prepare the entangled state Redistribution, especially when multiple people share secrets, consumes a lot of quantum resources and the efficiency of information sharing is low [2,3,4]; 2) Some secret sharing technologies are only suitable for three parties to share and lack scalability [2]; 3) In realistic situations, some participants may be impersonated or some authenticated participants may provide false shared shares, and the protocol lacks secret verification and may be disturbed when reconstructing the original secret [3,4]

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