Quantum digital signature for the access control of sensitive data in the big data era

In our paper we focus on the application of quantum digital signature in the access control of sensitive data such as those data appears in areas like healthcare in order to protect users personal information. There are three parties in our protocol: the signer, the arbitrator and the receiver. Different from most existing protocols developed in arbitrated quantum signature, in which the arbitrator is either assumed to be honest or dishonest, in our protocol we assume the arbitrator is partially honest in the sense that the arbitrator is honest-but-curious. The quantum protocol we propose in this paper have various advantages over existing protocols of the same purpose. The technology we proposed can guarantee the unconditional secure, and it is implementable by the current technology, so the method we proposed can guarantee the security of user' personal information in the big data era.