Fault-tolerant Quantum Blind Dualsignature Protocol Against Collective Noise

Quantum communication is a new technology of interdisciplinary discipline.It uses the basic rules of quantum mechanics based on classic communication,such as Heisenberg's noncloning principle,uncertainty principle,etc.,and forms a more secure form of quantum communication.Quantum signature is a branch area of quantum communication,it allowed the sender of the message attaches a verifiable signature to the message,and the receiver determines the source of the message by verifying the signature,which increases the security of the information.Based on logical qubits,this article proposed two quantum signature protocols that resist CR(collective-rotation)noise and CDP(collective-dephasing)noise separately,and then further propose a quantum signature protocol can resists two collective noises simultaneously.The main work of this article is as follows:1.Based on logical qubits,we have designed two quantum double blind signature protocols that resist two type of collective noise separately.There are three parties involved in the protocol,and the signer cannot know the specific content of the initial information.The recipient will not accept the signature and the message until the validity of the two signatures is verified.We verified that the signature protocol is non-repudiation,non-forgeability,blind information,and security against eavesdropping attacks.Finally,the fidelity of various qubits under collective noise is compared,and the results are analyzed that the fidelity is better by using the logical quantum protocol in the channel with the collective noise.The improvement of fidelity make the lower rate of success in covering up errors caused by eavesdropping attacks.The protocol had better security2.We propose a quantum signature protocol that resists two collective noises simultaneously.The protocol has two decoy schemes that focus on safety and fidelity,respectively.The security of the protocol is improved because the sender of the information only makes measurements.We analyze the non-repudiation,unforgeability,and verifiability of the protocol,and give a comparison of fidelity in a variety of collective noise environments.The results show that the communication fidelity of our proposed protocol is higher in a collective noise environment than a protocol using physical qubits,and therefore has higher security.