Collusion-Secure Semi-Quantum Secret Sharing Scheme using a Quantum Third Party
A new semi-quantum secret sharing protocol resists collusion between a quantum third party and a dishonest participant.
The paper proposes a semi-quantum secret sharing scheme in which classical participants only prepare and measure qubits in the Z basis, while a quantum third party helps distribute shares of a classical secret. Earlier designs can let that third party collude with a dishonest participant and recover the secret without detection. The authors claim information-theoretic security against this collusion and prove resistance to a broad set of external and internal attacks, including DCNA. The construction uses a classical dealer and basic Bell states and aims to improve qubit efficiency over prior SQSS protocols.
- Stops a quantum third party colluding with a dishonest participant
- Claims information-theoretic security against collusion and DCNA attacks
- Uses a classical dealer and basic Bell states
- Improves qubit efficiency relative to prior SQSS protocols
From the original article
1 min read at arxiv.orgThe security of a secret sharing protocol is compromised if one or more dishonest participants can reconstruct the secret by deviating from the prescribed protocol, particularly when such malicious behavior remains undetected.
By Santanu Majhi · arxiv.org
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