Verifiable Quantum Secret Sharing Protocols Based on Four-Qubit Entangled States

A new verifiable three-party quantum secret sharing protocol is proposed based on a special four-qubit entangled state which is inequivalent to four-qubit singlet states under stochastic local operations and classical communication (SLOCC). The validity of the reconstructed secret is verifiable based on the method like Byzantine agreement. It is generalized to verifiable multiparty quantum secret sharing based on four-qubit entangled states. It is shown to be secure against common attacks and feasible with present-day technology. PACS number(s): 03.67.Dd, 03.67.Hk, 03.67.Lx.