摘要本文是关于数字签密的理论和实现的研究，目的是掌握密码学的整体框架。本文介绍了密码学的发展史，加密、数字签名、数字签密等概念。区分了，对称密码和非对称密码体制，并且概括的描述了各种签密体制。其中主要包含，基于PKI的签密体制、基于身份的签密体制、无证书签密体制等三个基本签密类型，还有混合签密体制以及具有特殊性质的签密体制。最后，笔者以无证书签密体制中的一个BF签密方案来展示数字签密实现的原理，画出了流程图，并用展示了其程序实现。数字签密具有很大的优势和应用的前景，在大数据时代，如何更安全有效的传递信息无疑是一个重大的课题。不断有新的签密方案被提出，通过对这些方案的分析和安全性证明，我们可以更好的扩大数字签密的应用范围，使我们的生活更加安全便捷。87660

毕业论文关键词  密码学 对称密码体制 公钥密码体制 椭圆曲线 离散对数 哈希函数 数字签密 签密体制 算法 安全性验证

毕业设计说明书外文摘要

Title   A brief research on signcryption and its realization           

Abstract This paper is dedicated to the research of Sycryption and its realization。 A big picture of the structure of the Cryptography should be seen in this thesis。The history of the subject is briefly concluded in this paper。 In completing the thesis, the author introduced the concepts of encryption、digital signature and signcrytion，as well as distinguished single key cryptography and public key cryptography。There is a conclusion about digital signcryption which contains PKI-based signcryption,identity-based signcryption,certificateless signcryption、special signcryption and mixed signcryption。In the last part of the essay,a B-F signcrytion is demonstrated to show the process of realizing a signcrytion scheme。 It's crucial to learn the latest information about Sycryption research, and have a thorough understanding of different Sycryption algorithms。 Part of the algorithm is demonstrated in this paper。 In the big data era, there is no doubt that the biggest subject of the century is to deliver messages in a much more effective and secure way。 Therefore, Sycryption with a big advantage in efficiency has a board application field。 New algorithms of Sycryption are constantly arising。 Through the analysis of these new schemes and the proof of their security, we can enlarge the range of Sycryption applications we use and make our life securer and faster。

Keywords: Cryptography,Single key cryptography, Public key cryptography ,Elliptic curve, Discrete logarithm,hash functions, Digital signcryption, Signcryption scheme, Algorithm, Security verification

目   次

1  引言 1

2  密码学和数字签密的理论基础  3

2。1 加密  3

2。2公钥认证方法 3

2。3 数字签名 3

2。4数字签密 6

2。5可证明安全性理论 6

3 典型数字签密体制的介绍 8

3。1 PKI的签密体制  8

  3。2基于身份的签密体制  8

3。3无证书签密体制   9

3。4具有特殊性质的签密体制  10

3。5混合签密体制  10

3。6异构签密体制  11

4 BF无证书数字签密算法实现流程  13

4。1 BF签密方案算法描述 13

4。2 BF方案安全性 14

4。3 BF方案实施流程图  15源-于,优+尔^论=文.网wwW.yOueRw.com 原文+QQ752.018766