Quantum Distributed Ballot Scheme Based on Entanglement Swapping

We proposed a novel quantum distributed ballot scheme using swapping quantum entanglement of Bell states. The entanglement is distributed over separated voter's sites; physical inaccessibility of any one site is sufficient to guarantee the anonymity of the votes. The ballot information is encoded by local operations performed on the particles of entangled EPR states, which ensures the security present scheme. The checking phase is designed in detail based on entanglement swapping. The security of these protocols with respect to various kinds of attack is discussed.