A weak blind quantum signature protocol based on four-particle cluster state

In this paper, we introduce the cluster states into the weak blind quantum signature mechanism and put forward a weak blind quantum signature protocol with the four-particle entangled cluster states. The proposed protocol generates four relatively bases to be served as the measurement bases for two- qubit. The employment of QKD protocol and one-time pad encryption algorithm ensure the unconditional security of the protocol. Moreover, we hereinafter prove the security of the protocol against some individual eavesdropping attacks, and we show that our protocol has the characteristics of unforgeability, undeniability, blindness and traceability.