【作者】 曹刚；

【导师】 张秉儒；

【作者基本信息】 青海师范大学 ， 基础数学， 2010， 硕士

【摘要】 数字签名技术作为保证信息完整性和身份认证的重要工具,已成为信息安全的一个重要机制。在现实应用中,为适应不同环境的需要,产生了许多特种签名方案,如:群签名、环签名、盲签名、代理签名、门限签名等。其中盲签名,由于它能够保障签名申请者的匿名性,所以在电子现金和电子选举中有广泛的应用前景。而环签名解决了对签名者完全匿名性的问题,也取得了广泛的应用。本文首先对密码学知识进行了简单介绍,包括:数字签名的基础知识,盲签名与环签名的研究背景、发展状况与现实意义。此外,叙述了密码学及数论的相关知识。其次,作者在阅读大量国内外文献的基础上,在盲签名与环签名方面做了一些有益的探索和尝试,主要取得了以下研究成果:1、给出了一个完全盲签名方案,此方案是基于ELGmanl盲签名体制。2、把代理签名和盲签名相结合,得到了一个代理盲签名方案。3、把盲签名和环签名相结合,得到了一个环盲签名方案。4、把前向安全特性和主密钥机制引入环签名,给出了一个前向安全环签名。5、介绍了电子商务的相关知识,并将盲签名方案具体应用到电子现金中,提出了一个基于失败---终止数字签名的离线电子系统和一个具有完全盲性和前向安全特性的电子现金系统方案。最后,简单介绍了环签名的应用及环签名的研究方向。更多还原

【Abstract】 Digital signature technology to ensure information integrity and identity as an important tool for certification has become an important mechanism for information security.In real applications, to meet the needs of different environments, result in a number of special signature scheme. such as: group signature, ring signature, blind signature, proxy signature, threshold signatures. Blind signature, due to its ability to protect the anonymity of those who sign up for them, electronic cash and electronic elections have broad application prospects. The ring signature on the signer to solve completely anonymous in nature, also has been made a wide range of applications.In this paper, knowledge of cryptography has a brief introduction, including: the basic knowledge of digital signatures , the research background of blind signatures and ring signatures , development status and practical significance. In addition, describes the relevant knowledge of cryptography and elementary number theory.Secondly, the author read a large number domestic and foreign literature . In the blind signature and ring signature has done some useful explorations and attempts to achieve the following key findings:1、Give a completely blind signature scheme. This program is based on blind signature system ELGmanl.2、Combinating proxy signature with blind signature , give a proxy blind signature schemes.3、Give a blind ring signature scheme on blind signature and ring signature combination.4、Through introducing forward security and master key mechanism into ring signature,a forward security ring signature was obtained.5、Introduced the e-commerce knowledge, and blind signature schemes are specifically applicable to electronic cash. A digital signature based on the failure --- off-line electronic systems and a fully blind and prior security features of e-cash System program were given.Finally, a brief introduction of the ring signature applications and ring signature research.更多还原