Abstract: This paper proposes a proxy multiblind signature scheme based on conic curves over Zn with the characteristics of blind signature，proxy signature and multi-signature in combination，while the size of the signature will not be increased as the number of signatories increases.Compared with methods based on other public-key cryptosystem，this scheme has the facilities in realization and plaintext embedding as well as faster speed in addition .The paper also gives proofs of the correctness，the blindability，the undeniability non-repudiation and distinguishability of the scheme.

Key words: conic curves, blind signature, proxy signature, proxy multiblind signature

摘要： 提出了一种基于剩余类环Zn上圆锥曲线的代理多重盲签名方案，该方案具备盲签名、代理签名和多重签名的组合优势并且签名尺寸不会随签名人数的增加而增加，另外，与基于其它类型的公钥密码体制的代理多重盲签名方案相比，该方案还具有明文嵌入方便、运算速度快、更易于实现等优点。论文对方案的正确性、盲性、不可伪造性、不可抵赖性和可区分性进行了证明。

关键词: 圆锥曲线, 盲签名, 代理签名, 代理多重盲签名