一种防抵赖的多级代理签名方案

Undeniable Multiple Grade Proxy Signature Scheme

为了解决原始签名人和代理签名人之间的诸多抵赖问题,实现安全有效代理,基于离散对数提出了一种多级代理签名方案．把最终代理签名人的私钥嵌入最终的代理签名密钥中,使原始签名人和代理签名人都不能单独生成一个有效的多级代理签名,实现了一种防原始签名人和代理签名人互相抵赖的多级代理签名方案,与现有其他方案相比,其安全性得到了明显提高．

The denial between the original signer and the proxy signers is a serious problem in multiple grade proxy signature scheme. In order to solve this problem, an undeniable multiple grade proxy signature scheme is proposed based on the study of the discrete logarithm. This scheme puts a private key of the last proxy signer into the final proxy-signing key to ensure that none of the signers can deny their signatures, because the original signer and the proxy signer can＇t produce an effective multiple grade proxy signature by themselves. Therefore, they are both responsible for the signatures. As a result, compared to other schemes, a more secure multiple grade proxy signature is achieved with this solution.