Signature Scheme Based on Qantum Entanglement Swapping

In this paper, an quantum signature scheme is presented which based on the entanglement swapping. In this scheme, Alice performs a local unitary operation on her two qubits according to message code, after swapping qubits with administrator and Bob, Alice gets the signature by measure her qubits, Bob can verify signature via the measurement outcomes of three sides. This scheme is secure absolutely, it can be applied in a quantum communication network, as well as quantum identification, and it is easy to realize by the present-day technologies.