【正文】 ............................... 3 2 密碼學(xué)基本概念 ..................................................................................................... 4 公鑰密碼基本概念 ..................................................................................... 5 公鑰密碼原理 ...................................................................................... 5 公鑰密碼的理論基礎(chǔ) ........................................................................... 6 對稱加密體制 ............................................................................................. 6 3 數(shù)字簽名的基本概念和理論 ................................................................................. 8 數(shù)字簽名概念 .............................................................................................. 8 數(shù)字簽名理論 ............................................................................................. 8 數(shù)字簽名過程 .............................................................................................. 9 ................................................................................... 9 ................................................................................. 10 4 數(shù)字簽名常見的算法及其數(shù)字簽名 ................................................................... 12 DSA 數(shù)字簽名算法 ................................................................................... 12 DSA 數(shù)字 簽名實現(xiàn)的三個步驟 ........................................................ 12 DSA 的安全性 .................................................................................... 13 橢圓曲線代理簽名體制 ........................................................................... 13 橢圓曲線數(shù)字簽名 ECDSA .............................................................. 13 橢圓曲線數(shù)字簽名的安全性 ............................................................. 14 5 RSA 算法及其數(shù)字簽名 ...................................................................................... 15 RSA 簡述 ................................................................................................... 15 RSA 加密的可行性 ................................................................................... 16 RSA 算法的介紹 ....................................................................................... 16 RSA 中素數(shù)的選取 ............................................................................ 17 RSA 用到的公式和定理 .................................................................... 17 RSA 安全性的分析 ............................................................................ 17 RSA 的攻擊 ........................................................................................ 18 RSA 的缺點 ........................................................................................ 19 目錄 RSA 的優(yōu)點 ........................................................................................ 20 RSA 數(shù)字簽名 ........................................................................................... 20 RSA 數(shù)字簽 名的過程 ........................................................................ 20 RSA 數(shù)字簽名算法實現(xiàn)步驟 ..............................錯誤 !未定義書簽。 encryption。 本文主要是對 RSA公開密鑰密碼體制的研究，并在此基礎(chǔ)上實現(xiàn)了 RSA的數(shù)字簽名的體制。它通過認(rèn)證技術(shù)來分辨真與假。 RSA算法是第一個能同時用于加密和數(shù)字簽名的算法，易于應(yīng)用和理解。摘要 I 摘 要 當(dāng)今世界信息技術(shù)獲得了前所未有的大發(fā)展，因而信息的安全性必將變得越來越受到人們的重視。而數(shù)字簽名技術(shù)是目前網(wǎng)絡(luò)安全領(lǐng)域的研究熱門方向。 RSA從提出一直到現(xiàn)在，它經(jīng)歷了各種考驗。 RSA數(shù)字簽名體制使用地是 RSA公開密鑰算法進行得數(shù)字簽名。本文的主要內(nèi)容包括： 關(guān)鍵詞 ： 加密 解密 RSA 算法 RSA 數(shù)字簽名 摘要 II Abstract Now the information of the world is developing the security of the information is being more and more importantly. Digital signature filed will bee hot spots in future. It is the first algorithm for both data encryption and digital can be understood easily by has undergone various tests when it is put as the public key cryptosystem representative approved data integrity is a kind of information technology. It is through the authentication techniques to distinguish true and false. RSA digital signature system using a RSA public key algorithm for digital signature. The text is about the study of RSA public key encryption,based on this generating RSA digital : ,Firstly on the basis of previous research, a system based on elliptical curve proxy signature, The advantage of public key encryption and the security of RSA digital signature(attack )Secondly,it analyzes the principle of RSA,including how to generat a prime number,how to generat the secret keys and how to encryption as well as decrypt, Thirdly,it states the principle of MD5 in , it states design and realization of RSA digital signature in detail. The main modules includes producing RSA secret keys, imp lementation of RSA encryption algorithm and decryption algorithm, producing message digest and realizing digital signature and verification by RSA. Key words: RSA algorithm。 decryption。 散列函數(shù)的原理 ................................................................................ 21 MD5 算法的簡介 ............................................................................... 22 6 RSA 數(shù)字簽名設(shè)計與實現(xiàn) .................................................................................. 23 開發(fā)環(huán)境的介紹 ....................................................................................... 23 C語言概述 ........................................................................................ 23 C語言特點 ........................................................................................ 23 類的介紹 ........................................................................................... 24 RSA 數(shù)字簽名所需實現(xiàn)的功能 ............................................................... 25 本軟件的總體要求和設(shè)計 ....................................................................... 25 主要實現(xiàn)代碼及軟件運行結(jié)果 ................................................................ 26 結(jié)論 .......................................................................................................................... 30 致謝 .....................................