新的多代理签名和多代理多签名方案

涉及多个签名人的代理签名体制有三类：第一类称为代理多签名体制；第二类称为多代理签名体制；第三类称为多代理多签名体制。针对Lee等人的强代理签名方案和代理多签名方案中的安全缺陷，给出了新的改进方案，新方案能有效地防止原始签名人的伪造攻击，在改进方案的基础上给出了安全的多代理签名方案和多代理多签名方案。

Multi-proxy signature and multi-proxy multi-signature schemes based on LKK scheme

There are three types of proxy signature schemes that deal with multiple signers.The first type is called a proxy multi-signature scheme.The second type is called a multi-proxy signature scheme.The third type is called multi-proxy multi-signature scheme.A new improved strong proxy signature scheme based on the weakness of Lee et al's strong proxy signature scheme and proxy multi-signature scheme is proposed.The improved scheme can efficiently resist forgery attack of original signer as well as keep the prop...