文件的加密与解密算法研究与实现摘要：随着信息社会的到来，人们在享受信息资源所带来的巨大的利益的同时，也面临着信息安全的严峻考验。信息安全已经成为世界性的现实问题，信息安全问题已威胁到国家的政治、经济、军事、文化、意识形态等领域，同时，信息安全问题也是人们能否护自己的个人隐私的关键。信息安全是社会稳定安全的必要前提条件。本文是一篇讨论关于常用文件加密解密算法的毕业设计论文，它详细的讲述了文件加密解密算法实现的过程中所用到的方法、技术。对公钥密码体制和私钥密码体制进行了分析和研究，并对公钥密码体制和私钥密码体制的代表RSA算法和DES算法进行了研究和比较。关键词：解密；文件加密；密码体制；DES；RSADesignandImplementationofDocumenttaggingsoftwareAbstract:Withtheadventoftheinformationsociety,peopleintheenjoymentofinformationresourcesbroughtabouttremendousbenefits,butalsofacedwithaletterIncomesecurity,aseveretest.Informationsecurityhasbecomeaworldwidereality,informationsecurityhasbeenathreattothecountry'spoliticalGovernance,economic,military,cultural,ideologicalandotherareasatthesametime,theissueofinformationsecurityisalsoapossibilityofretainingtheirownpersonalPrivacykey.Informationsecurityandsocialstabilityisanecessarypreconditionforsecurity.Thisarticleisadiscussionpaperonencryptionanddecryptionalgorithmscommonlyusedingraduatedesignthesis,whichdocumentsindetailabouttheencryptionanddecryptionprocessofalgorithmusedinthemethodsandtechniques.Ofpublic-keycryptosystemprivatekeycryptosystemandanalysisandresearch,andpublic-keycryptosystemandonbehalfofprivatekeycryptographyalgorithmRSAalgorithmandDEShavebeenstudiedandcompared.Keywords:Decryption;fileencryption;cryptosystem;DES;RSA目录摘要……………………………………………………………………2目录...........................................................................................................................................................31、前言.....................................................................................................................................................42、需求分析.............................................................................................................................................52.1系统概述.......................................................................................................................................52.1.1概述........................................................................................................................................52.2密码学的发展................................................................................................................................52.3文件加密解密中密码体制研究....................................................................................................82.3.1密码原理................................................................................................................................82.3.2密码体制................................................................................................................................94、分组加密解密算法-DES算法...........................................................................................................104.1DES算法......................................................................................................................................103.2RSA算法..........................................................................
