Research On Identity-based Quantum Signature Schemes

Quantum signature scheme is a signature scheme based on the principle of quantum mechanics.Its security depends on some basic principles of quantum mechanics,rather than the computational complexity of traditional mathematics.Theoretically,quantum signature scheme can resist the attack of quantum adversary.Although many quantum signatures have been proposed,there are few studies on identities-based quantum signatures.The identity-based digital signature makes it unnecessary for the system to establish and maintain the public key directory,and every user need not use the public key certificate,but takes the his/her identity information as the main means of verifying the validity of the digital signature.This idea greatly simplifies the key management.In order to make the quantum signature scheme have the advantages of the identity-based cryptographic management scheme,this paper mainly focuses on the research of the identity-based quantum signature.The main research contributions are as follows:Firstly,based on the identity-based quantum signature proposed by Chen et al.,several identity-based quantum signature schemes are proposed.Compared with similar schemes,some scheme proposed in this paper not only have the advantage of identity-based system,but also needs no quantum swap test,and they can arbitrate the disputation of losing quantum signature.Some schemes do not need entangled states.Thus,the efficiency and practicability of the signature scheme are further improved.The security analysis shows that the proposed schemes can resist the attack of the quantum adversary,and have the security properties such as indistinguishable ciphertext,unforgeability and non-repudiation.Secondly,several identity-based designated verifier quantum signature schemes are proposed for the scenarios where signatures have to be verified by a designated verifier.The proposed schemes have both the advantages of the identity-based system and the attribute of the designated verification.The security analysis shows that the proposed schemes can resist the attack of quantum adversary,and they have the security properties of ciphertext indistinguishability,unforgeability and non-repudiation.Compared with similar schemes,the proposed schemes do not need entanglement and any quantum exchange test.Therefore,our schemes have a better efficiency.