Research And Design On Verifiable Secret Sharing Protocol Based On Eight Quantum Entangled States

Quantum secret sharing(QSS)is an important part of quantum cryptography.As a substitute of Classic secret sharing(CSS)technology in the era of quantum information,it realizes the use of quantum means to divide a secret data into many copies and distribute them to different participants at the same time.Only with the cooperation of all participants can the decryptor reproduce the secret.The eavesdropper can't get any secret alone or in collusion with others.Compared with CSS,QSS has higher security.It can detect eavesdropping in the process and judge whether there is eavesdropping behavior to ensure the security of the protocol.In this paper,we focus on the QSS protocol based on quantum entangled states.The main research results are as follows:(1)Based on the eight-quantum-entangled state,a three party verifiable QSS scheme is proposed.It involves three agents and is divided into four stages: shadow distribution stage,eavesdropping detection stage,measurement and secret sharing stage,verification and secret recovery stage.The protocol can not only share and recover secrets,but also verify whether there are dishonest participants in the communication.Besides,the protocol is extended to multi-party QSS scheme by unitary operation.Security analysis shows that the proposed scheme achieves the basic security requirements against external and internal attackers with the help of quantum decoy state.Compared with other protocols,it has higher efficiency in the transmission process.(2)According to the requirement of safety file management,a solution of safety file management system based on QSS is designed.The system can provide different intensity encryption solutions for files with different security levels,different contents and different values.Asymmetric public key system is used to encrypt the ordinary file with low attack value.Digitally sign the original credentials and recorded in the blockchain,and the high-value confidential file is fully homomorphic encrypted,which allows the file processor to process the encrypted file directly,and realizes data processing security on the basis of storage security.This paper focuses on the application of quantum secret sharing protocol.Compared with the solution of the existing file system,the quantum key generated in this scheme can be distributed to the access right holders,who have the right to agree or object to the access request of the visitors,and can access the file data only after the consent of all the access right holders.In this scheme,the security of key distribution is guaranteed by quantum secret sharing protocol.