关键词: 量子秘密共享, 团簇态, EPR对, 诱骗态, 量子比特效率

Abstract: A quantum secret sharing scheme based on cluster states is proposed. The sender encodes the classical secret on cluster states by Pauli operation and the receivers recover secret information by joint measurement. It inserts EPR pairs as decoy states into the sequences of state to prevent eavesdropping. It is showed that this protocol is secure to resist attacks of intercept-measurement, intercept-resend and entanglement-measurement by security analysis. At the same time, one cluster state with four particles can share four bits of classical information, such that qubit efficiency goes to100%.

Key words: quantum secret sharing, cluster states, EPR pairs, decoy states, qubit efficiency