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基于可控的量子隐形传态,提出一个以四粒子cluster态为量子信道的量子多重代理盲签名方案。首先代理签名人U_j对他拥有的粒子进行Bell基测量,产生代理申请;然后原始签名Charlie对自己的粒子进行Bell基测量来授权U_j进行签名;最后验证者Bob进行相应的幺正变换验证签名。与已有的方案相比,此方案只需四粒子cluster态为量子信道,可以较少的资源和更大的安全性完成量子多重代理盲签名。安全性分析表明该方案满足不可伪造性、不可否认性、盲性以及无条件安全性。
Based on the controlled quantum teleportation, a quantum multiple proxy blind signature scheme with four-particle cluster state as quantum channel is proposed. First, the proxy signer U_j performs Bell-based measurements on the particles he owns and generates the proxy application. Then, the original signature Charlie performs Bell-based measurements on his particle to authorize U_j to sign it. Finally, the verifier Bob signs the corresponding unitary transform verification signature. Compared with the existing schemes, this scheme only needs four-particle cluster state as quantum channel, and can accomplish quantum multiple proxy blind signature with less resource and greater security. Security analysis shows that the scheme can satisfy unforgeability, non-repudiation, blindness and unconditional security.