| Quantum secret sharing is an important branch of quantum secret communication research,that its protocol is generally based on quantum entanglement state and its security is by the basicprinciple of quantum mechanics. If an eavesdropper wants to obtain the useful information fromthe unknown quantum signal, it will inevitably introduce the interference with quantum signalstates. Then the eaveasdropper will be detected by eligible communication participants in theprocess of eavesdropping testing. Generally, the methods of quantum secret sharing mainlyincludes in two cases: one is to share the classical inforamation by using quantum mechanicssuch as HBB99and ZMZ05protocols; another one is to share the quantum information by usingquantum methods, that they share the quantum states directly between these communicationparticipants, such as QZ11protocol.We found these previous protocols all existed some security risk through analyzing. Wepropose two kinds of verifiable quantum secret sharing protocol based on entanglementswapping in this paper, that the difference of two methods lies in the ways of informationinteraction which one is one to multiple with one-way and another one is one to one with a cycle.Before one participant communicates with the next participant, he chooses the detecting orinformation mode by uniform distribution until he can make sure the information to theparticipant is safe. These kinds of protocols can prevent not only the external eavesdropping butalso the internal cheating, and guarantee the correction and security of shared information forverifying. In addition, the protocol is security if there is four or more than four participants. |
