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利用量子安全直接通信和量子密集编码的思想,本文提出一个新的基于GHZ三重态的高效量子秘密共享(QSS)方案.利用量子相干性和一个公开的比特串K,A lice直接让Bob和Charlie共享其秘密消息,而不是首先与Bob和Charlie建立共享的联合密钥,再用联合密钥传输消息.该方案中平均消耗一个GHZ态可以共享两比特的经典信息.我们分别给出了无噪声信道和有噪声信道情形的安全性分析,并重点就量子直接秘密共享和量子安全直接通信之间的区别说明了协议中使用公开的K的必要性.
Using the idea of quantum secure direct communication and quantum dense coding, this paper presents a new scheme based on GHZ triplet state-efficient quantum secret sharing (QSS). Using quantum coherence and a public bit string K, Alice directly lets Bob and Charlie Instead of first sharing the shared key with Bob and Charlie and then transmitting the message with the joint key, the scheme consumes an average of two GHZ states to share two bits of classical information.We give noiseless Channel and noisy channel scenarios and emphasizes the necessity of using the public K in the protocol for the distinction between quantum direct secret sharing and quantum secure direct communication.