Quantum Signature Scheme Based on Secret Sharing

Characterized by integrity and non-repudiation, digital signatures play an essential role in real life. Quantum digital signatures, which outperform classical types generally in safety, have been widely used in secure communications. In this paper, a novel quantum signature scheme based on quantum encryption, XOR encryption and secret sharing without entanglement is designed. Furthermore, it can be extended to a quantum multi-signature scheme. Unlike existing schemes, it is more efficient in guaranteeing safety, more practical and does not need to prepare a large number of entanglements or operations.