【作者】 黄隽；

【导师】 杜伟章；

【作者基本信息】 长沙理工大学 ， 通信与信息系统， 2012， 硕士

【摘要】 计算机网络的普及给人们的日常生活带来了极大的便利，把我们带入到一个信息化的社会。随着计算机网络技术的发展，信息安全问题日益突出。数字签名技术保证了传输信息的真实性。但是简单模拟手写签名的一般数字签名已经不能满足实际应用的需求，根据各种各样的应用背景，许多具有特殊性质的数字签名方案应运而生，代理盲签名就是其中典型的一种。代理盲签名作为代理签名和盲签名结合在电子商务中有着重要的作用。本论文针对代理盲签名体制进行了分析和研究，主要工作如下：1.通过对一种基于身份的代理盲签名方案的分析，指出该方案不具有不可追踪性，代理签名人可以将盲消息的签名和消息签名联系起来。在此基础上提出一种改进的基于身份的代理盲签名方案，克服了原方案的安全缺陷，并保留已有方案的其它优点，具有一定的实用价值。2.将代理盲签名和无证书签名方案相结合，构造出了无证书代理盲签名方案,使签名避免了基于证书密码系统的证书管理问题和基于身份的密钥托管问题，能够防止不可信的密钥管理机构伪造签名。并对构造出的方案进行安全性分析，分析结果表明新方案不仅具有代理盲签名所有的性质，而且还具有很高的效率。3.构造出一种具有消息恢复指定接收人的代理盲签名方案，指定接收人能够直接从签名中恢复消息，从而减少了系统的通信量，使得通信效率高。并且从对方案的安全性分析结果表明，构造出的方案具有较高的安全性，具有一定的实用价值。最后，总结了本文的工作，并展望代理盲签名体制的研究和发展。更多还原

【Abstract】 The popularization of computer network has brought great convenience topeople’s daily life, and takes us into an informational society. With the developmentof computer network technology, the information security problems have becomeincreasingly prominent. The technology of digital signature ensures the authenticityof information transmission. However, the general signature, which is a simplesimulation of handwritten signature, can not meet the practical need any more, underthe various application backgrounds, many digital signature schemes with specialproperties have emerged, and proxy blind signature is a typical one. As thecombination of proxy signature and blind signature, proxy blind signature plays animportant role in electronic commerce.In this thesis, proxy blind signature schemes are analyzed and studied, the mainresults are described as follows.Firstly, a kind of identity-based proxy blind signature scheme is analyzed, and itis found that the scheme can’t satisfy the unlinkability property. The proxy signercould make a linkage between a message signature and the corresponding blindmessage signature. An improved identity-based proxy blind signature scheme isproposed, which can resolve the security problems existing in the original scheme,and retains the merits of the original scheme. It has some application value.Secondly, combining proxy blind signature with certificateless signature scheme,a certificateless proxy blind signature scheme is proposed. This scheme can overcomethe problem of the certificate management in the certificate-based public keycryptosystem and the inherent key escrow problem in the identity-based public keycryptosystem, being able to prevent forging signatures by un-trusted key managementagencies. A security analysis of the scheme is given, the following analysis show thatthis scheme not only has all the properties of proxy blind signature, but also with abetter performance.Thirdly, a proxy blind signature scheme with designated message recoveryreceiver was constructed. The designated receiver can recover messages from signature directly, enabling a reduction of system’s communication and animprovement in the communication efficiency. The results of safety analysis showedthat the scheme possessed higher security feature and gained a certain practical valueconsequently.At the end of this paper, we summarize the whole of the thesis and theprospective developing of proxy blind signature scheme in the future.更多还原