信息加密與隱藏工具的設(shè)計(jì)與實(shí)現(xiàn)

論文字?jǐn)?shù):12219,頁(yè)數(shù):28

摘    要
當(dāng)今時(shí)代，隨著電腦的普及應(yīng)用和互聯(lián)網(wǎng)的快速發(fā)展，網(wǎng)絡(luò)中露出的安全問(wèn)題引起普遍關(guān)注，網(wǎng)絡(luò)的安全，主要是網(wǎng)絡(luò)信息安全，需要采取相應(yīng)的保護(hù)措施，提供適合的安全服務(wù)，加密機(jī)制和信息隱藏技術(shù)作為保障網(wǎng)絡(luò)信息安全的手段，可以保證信息的完整性、可鑒別性和不可否認(rèn)性。在一些應(yīng)用中，它只需要讓指定接受人來(lái)驗(yàn)證，以確保信息的秘密性。本文主要研究了信息加密與隱藏技術(shù)，介紹信息安全的應(yīng)用前景，通過(guò)掌握的知識(shí)來(lái)實(shí)現(xiàn)一個(gè)簡(jiǎn)單信息加密與隱藏工具，包含加密和信息隱藏的功能，處理的對(duì)象主要是針對(duì)文本和圖片兩種文件格式，使用簡(jiǎn)單的對(duì)稱(chēng)加密算法對(duì)文本進(jìn)行加密，而在圖片中隱藏另外一張圖片信息。該設(shè)計(jì)旨在理解信息加密與隱藏技術(shù)在實(shí)際生活中的應(yīng)用，從總體上闡述了它們的原理。另外，本設(shè)計(jì)成果可用于教學(xué)實(shí)驗(yàn)中。

關(guān)鍵詞：安全；加密；信息；隱藏
The Design and Implementation of an Information Encryption and Hiding Tool
Abstract
In modern times, with the universal application of computers and rapid development of the Internet, more people have paid attention to the security issues in the Internet. The security issues mainly refer to network information security, so it needs some protection measures and provides appropriate security services. As the protection measures of information security, the encryption and information hiding technology provides the functions of integration, authentication, and non-repudiation for the signing message. In some applications, it only needs to be verified by some recipients while keeping the message secret from public. This paper mainly researches the information encryption and hiding technology and introduces the application prospects of the information security. Based on the acquired knowledge, a simple information encryption and hiding tool is designed, and it provides the functions of encryption and information hiding, and the handing object refers to the text and picture. The symmetric encryption algorithm is applied into the text encryption while a picture is hidden in another picture. The purpose of this design is to make the application of information encryption and hiding in real life understood, as well as to describe the principles of the technology on the whole. In addition, the designing result can be applied into the teaching and experiments.

Key words: security; encryption; information; hiding

目 錄

1 引言 1
1.1 課題背景 1
1.2 本課題研究意義 1
2 信息隱藏技術(shù) 1
2.1 信息隱藏簡(jiǎn)介 1
2.2 信息隱藏技術(shù)的分類(lèi) 2
2.3 信息隱藏關(guān)鍵技術(shù) 3
2.4 信息隱藏的應(yīng)用領(lǐng)域 3
3 加解密相關(guān)技術(shù) 4
3.1 密碼學(xué)知識(shí) 4
3.1.1 密鑰和算法 4
3.1.2 對(duì)稱(chēng)密鑰算法 4
3.1.3 非對(duì)稱(chēng)密鑰算法 5
4 實(shí)現(xiàn)一個(gè)信息加密與隱藏工具 6
4.1 設(shè)計(jì)思路 6
4.1.1 界面設(shè)計(jì)思路 6
4.1.2 信息加密設(shè)計(jì)思路 6
4.1.3 信息隱藏設(shè)計(jì)思路 6
4.2 設(shè)計(jì)流程 6
4.2.1 信息加密流程 6
4.2.2 信息隱藏流程 7
4.2.3 信息解密流程 7
4.2.4 隱藏信息提取流程 7
4.3 設(shè)計(jì)前言 8
4.3.1 設(shè)計(jì)工具 8
4.3.2 已有設(shè)計(jì)條件 8
4.3.3 設(shè)計(jì)目的 8
4.4 信息加密與隱藏設(shè)計(jì)過(guò)程分析 8
4.4.1 信息加密 8
4.4.2 信息隱藏 11
4.5 解密與隱藏信息提取設(shè)計(jì)過(guò)程分析 15
4.5.1 文本信息的解密 15
4.5.2 隱藏信息的提取 16
4.6 實(shí)例運(yùn)行與測(cè)試 18
4.6.1 信息加密與隱藏過(guò)程 18
4.6.2 解密與隱藏信息提取過(guò)程 19
結(jié)    論 21
參考文獻(xiàn) 21
致    謝 22
聲    明 23