Multi-party quantum secret sharing method based on quantum walk and system thereof

Abstract

The invention provides a multi-party quantum secret sharing method based on quantum walk and a system thereof, and the method comprises the following steps: S1, firstly constructing a quantum walk subsystem by a secret distributor Alice, and executing the quantum walk to generate an entangled state for secret sharing; S2, enabling a secret distributor Alice splits secret to share and distribute the secret shares to participants, and executing wiretapping detection; after eavesdropping detection, measuring particles in the hand by the participant; and S3, enabling the Alice to randomly select a part of measurement results as samples for verification, and recovering all original secret messages after verification is passed. According to the invention, quantum walking multi-party secret sharing is realized by using the on-ring quantum walking principle.

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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