A ghz-state-based authenticated semi-quantum secret sharing method and system

Abstract

The invention belongs to the technical field of information security, and discloses a GHZ-state-based verifiable half-quantum secret sharing method and system. A strong quantum party shares n-bit message m secrets with the first half-quantum party and the second half-quantum party. When both the first half-quantum party and the second half-quantum party know the encoding results of the other two parties, they get the secret message m; using the absolutely secure quantum key distribution technology, the strong quantum party shares the secret key with the first half-quantum party ab1 and key ab2 ; The strong quantum party shares the secret key with the second half quantum party ac1 and key ac2 ; The second half-quantum party shares the secret key with the first half-quantum party bc . In the process of sharing secrets, this invention completes the two-way authentication of user identities at the same time. The security analysis shows that this protocol can resist different attack strategies such as internal attacks and external attacks, and the shared key between users can be used multiple times; and this The invention has better particle usage efficiency, which helps to save quantum resources and efficiently complete three-party secret sharing.

Description

Technical field [0001] The invention belongs to the technical field of information security, and in particular relates to a certifiable semi-quantum secret sharing method and system based on a GHZ state. Background technique [0002] Currently, the closest existing technology: [0003] In the modern information society, classic cryptosystems based on complex mathematical calculations provide security for various application scenarios. With the rapid development of quantum technology, the emergence of quantum computers will make the existing encryption system vulnerable. Quantum cryptography builds an unconditionally secure cryptographic system based on the uncertainty principle of quantum mechanics, quantum uncertainty principle and other physical characteristics. In 1984, Bennett and Brassard proposed the first quantum key distribution protocol, followed by quantum secret sharing (QSS), quantum teleportation (QT), and quantum secure direct communication (quantum secure direct). ...

AI Technical Summary

Problems solved by technology

[0010] The existing quantum secret sharing protocol has a low security factor and cannot resist attack strategies such as interception and retransmission attacks, making the protocol

[0011] None of the existing technical solutions considers the issue of identity authentication

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