数据加密标准des的c++实现

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1、数据加密标准DES的C++实现摘要信息技术的飞速发展，使人们的生活面貌发生了很大改变，同时信息技术也促进了社会的发展。在计算机网络深入普及的信息时代，信息本身就是时间，就是财富。如何保护信息的安全使之不被窃取及不至于被篡改或破坏，已成为当今普遍关注的重大问题。密码是有效且可行的办法。本文主要介绍DES加密与解密算法的C++语言实现，从密钥生成、DES加密原理、DES解密原理3方面阐述了DES算法的整个过程。并在此基础上，在ationtechnologyrapiddevelopment,causedpeopleslifeappearancetohavetheverybigchange,simul

2、taneouslytheinformationtechnologyalsopromotedsocietysdevelopment.Intheputerationtime,informationitselfisthetime,istheationthesecuritytocauseitnottostealandasfornottotamperajorissueelyusefulonekindoflaborThisarticlemainlyintroducestheDESencryptionandthedecipheralgorithmClanguagerealization,Decipherpr

3、inciplethreeaspectselaboratedfromkeyfreshroomDES、theencryptionprincipleDES、theDESalgorithmentirehasent,realizestheDESencryptionandthedecipherusingstandardVC++6.0calculates,pletesalocaldocumentbytheonstration.Thepresentpaperaltogetherdividesintoseventobloulgatesthecryptologyfromthemodernelectronictec

4、hnologydevelopmenttobeimportantinthescientificdomain,Thusexplainedchoosesthistopictotakethegraduationprojectoriginally.Secondchapternarratedthecryptologyelementaryknooriginalholloaketheencryptskey、encryptstheDESdeciphertakekey、freshroomDESastheline,RealizestheDESencryptionandthedeciphercodeusingtheC

5、++languagesupposesdiscusses.Fourthchaptermakesthesimpleintroductiontotheingdynastyprintedbooksdemonstrationshoulduse.FifthchaptercarriesontheanalysistotheDESexistencesecuritysimultaneouslytoseparateoutthefeasiblesolution,SixthchaptercarriesonthebriefintroductiontotheDESphasisthisarticleadoptsECBpatt

6、ern.Seventhchaptergivesanexampletocarryonthetesttothecode,ConfirmsstothestandardDESencryptiontoreconcileLaos.Keyationsecurity;Key;DES;Encryption;Decipher;VC++6.0.