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通过使用Greenberger-Horne-Zeilinger态和经典哈希函数,提出一个量子公平盲签名方案.在该方案的初始化阶段,可信的仲裁者分别与盲签名者和接收者共享一个GHZ态序列和秘钥序列.在签名阶段,根据签名者和接收者对各自手中的GHZ态粒子的测量结果,签名者产生一个经典信息的盲量子签名.在验证阶段,根据GHZ态的关联性,仲裁者能够验证盲签名的合法性.最后,如果签名者和接收者对之前签订的消息有争议,仲裁者将在链接恢复阶段通过对签名的追溯来解决这个问题.本文还对该方案的安全性进行分析,结果表明它能满足公平盲签名的安全性要求,即不可伪造性、不可否认、盲性和可追踪性.
By using the Greenberger-Horne-Zeilinger states and classical hash functions, a quantum fair blind signature scheme is proposed, in which the trusted arbiter shares a GHZ state sequence and key respectively with blind signers and receivers In the signature stage, the signer generates a blind quantum signature of classical information according to the measurements of the GHZ particles in the hands of the signer and receiver.In the verification stage, according to the association of the GHZ states, the arbitrator can verify the blind The legitimacy of the signature.Finally, if the signer and receiver dispute the previously signed message, the arbiter will solve the problem by tracing back the signature during the link recovery phase.This paper also analyzes the security of the scheme and the result It shows that it can meet the security requirements of fair-blind signature, that is unforgeability, non-repudiation, blindness and traceability.