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首页> 外文会议>International Conference on Parallel and Distributed Processing Techniques and Applications(PDPTA'04) v.2; 20040621-20040624; Las Vegas,NV; US >An Improved Threshold Proxy Signature Scheme Based on the RSA Cryptosystem
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An Improved Threshold Proxy Signature Scheme Based on the RSA Cryptosystem

机译：基于RSA密码体制的改进门限代理签名方案

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摘要

The proxy signature scheme, a variation of ordinary digital signature schemes, enables a proxy signer to sign messages on behalf of the original signer. In a (t, n) threshold proxy signature scheme, the original signer authorizes a proxy group with n proxy members. Only the cooperation of t or more proxy members is allowed to generate the proxy signature. Former threshold proxy signature schemes are all based on the difficulty of discrete logarithm. In 2003, for the first time, Hwang et al proposed a practical (t,n) threshold proxy signature scheme based on the difficulty of factoring the RSA modulus. By our observation, their scheme can't provide the properties of proxy protection, strong unforgeability, strong nonrepudiation, strong identifiability and known signers. To overcome their drawbacks, based on their scheme, we propose an improved version. The improved scheme provides the properties of not only proxy protection, strong unforgeability, strong identifiability and strong nonrepudiation, but also known signers.
机译：代理签名方案是普通数字签名方案的变体，使代理签名者可以代表原始签名者对消息进行签名。在（t，n）门限代理签名方案中，原始签名者授权具有n个代理成员的代理组。仅允许t个或多个代理成员的合作来生成代理签名。以前的阈值代理签名方案都是基于离散对数的难度。 Hwang等人在2003年首次提出了一种实用的（t，n）门限代理签名方案，该方案基于分解RSA模数的难度。根据我们的观察，它们的方案不能提供代理保护，强不可伪性，强不可否认性，强可识别性和已知签名者的属性。为了克服它们的缺点，基于它们的方案，我们提出了一种改进的版本。改进的方案不仅具有代理保护，强不可伪性，强可识别性和强不可否认性的特性，而且还具有已知的签名者的特性。

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