Research And Design On Arbitration Quantum Signature Protocol

Quantum signature is based on the classical signature,using the principle of quantum mechanics to protect the integrity,non-repudiation and non-forgery of quantum information.As the significant research direction of quantum signature,arbitration quantum signature(AQS)is the front field of current research.In this paper,the theoretical basis of AQS is discussed in depth.The previous AQS schemes are studied and analyzed,and then some security loopholes are pointed out.Furthermore,the corresponding solutions are put forward.Moreover,in order to perfect the function of AQS arbitration,an arbitration quantum group blind signature(AQGBS)system with flexible tracking property is designed.The specific research contents are as follows :(1)In the perspective of dialogue encryption,the security of a kind of AQS schemes based on quantum one time pad is analyzed,and it is found that the quantum encryption algorithms which can be used for secure communication,could not be applied in AQS protocols,because it cannot resist forgery attack and repudiation attack.Therefore,in order to construct the encryption method suitable for AQS and quantum secure communication,a controlled quantum dialogue scheme based on AQS is proposed.The scheme adopts third party controller technology and decoy particle detection technology to prevent information forgery and leakage by deleting useless information carried by F particles.Through security and comparative analysis,the scheme can resist controller attack,the forgery attack of receiver and repudiation attack of signer.(2)In the perspective of encryption algorithm and tracing,the security of two typical schemes and the previous AQS of multi bits signature scheme is analyzed in this paper,and then some design defects are pointed out.In addition,the arbitration function of the supervisor will be limited.Thus,an innovative AQGBS system with flexible strain capacity is proposed,which includes two subsystems: signature verification and flexible tracking.The first subsystem constructs an improved encryption algorithm based on the chained CNOT operation,and uses the iterative principle and parallel characteristics of the Grover search algorithm to make up for the defects of the chained CNOT operation and ensure the security of the signature verification subsystem.Furthermore,the controlled quantum dialogue scheme is introduced to distribute the signature key.Compared with the previous AQS protocols,this subsystem has higher security.(3)The second subsystem is a flexible tracking subsystem,which uses the semi-quantum idea to construct a fair negotiation model and improves the arbitration function of supervisor.According to the different application scenarios,supervisor can negotiate with quantum signers to choose whether to track a real signer,that is,to flexibly choose whether to publish the identity of signer who signs the question signature.Then,the parallel characteristics of Grover search algorithm are used to reduce the complexity of multiparty negotiation.The analysis shows that this scheme not only has less resource consumption and higher transmission efficiency,but also can resist internal and external attacks.