基于纠缠交换的仲裁量子签名方案  

Arbitrated quantum signature scheme based on entanglement swapping

作　　者：李伟[1] 范明钰[1] 王光卫[1] 

机构地区：[1]电子科技大学计算机科学与工程学院,成都610054

出　　处：《物理学报》2011年第8期18-24,共7页Acta Physica Sinica

基　　金：国家高技术研究发展计划(批准号:2009AA01Z403;2009AA01Z435)资助的课题~~

摘　　要：提出了一种基于量子纠缠交换的仲裁签名协议.以Bell态为基础,首先将待签消息利用幺正算符序列进行编码,通过算符序列对Bell态进行调制,再通过对量子信息加密产生签名.验证者将签名信息与仲裁者通过纠缠交换所产生的关联态相结合,通过Bell测量来对签名的真实性进行验证.算法利用量子加密保障了真实签名的不可伪造性,同时通过仲裁的参与结合量子密钥有效解决了双方的抵赖问题,方案还能够有效实现对通信双方隐私信息的保护.An arbitrated quantum signature scheme based on entanglement swapping is proposed in this paper.On the foundation of Bell states,the message to be signed is coded with a unitary sequence,and consequently the unitary sequence is used to calibrate the Bell states between the signer and the arbitrator,finally the signature is generated through quantum cryptography.Using the correlation states generated through entanglement swapping on the arbitrator＇s side,the receiver can verify the signature through Bell measurement on his own side.In this scheme,anyone except the authentic signer cannot forge a legal signature and the true receiver cannot deny his recipient because the security of underling quantum cryptography and the participants＇ privacy are effectively protected in this scheme.

关 键 词：量子密码 量子签名 纠缠交换 

分 类 号：O413.1[理学—理论物理] TN918.1[理学—物理]