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ID:33491207
大小:2.10 MB
页数:71页
时间:2019-02-26
《基于公钥基础设施pki的安全电子邮件系统的实现》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、论文题目:叁王竺塑薹型堡蝗!!I塑安全电子邮件系统的实现学科专业作者姓名指导教师完成日期盐蔓垫巫旦熊莶羞登夏攮赳熬援三QQ互生二且摘要存Internet叫代,电Y'fltl],fq:以其方便、快姥、廉价的特点成为一种麓要的通惰力-℃,越柬越多嗣金,Ik}il个入缚灭鄢枉使Ⅲ}UT-iiiIl'Pt:发送和接收信怠。但是常用的I乜予r日ls'fq:系统的安全’rF存在诸多问题,突{I{的有:科名发送邮{牛、邮件在传送过霉t坤被偷窥鞠篡改、发件入列iltisfI:的抵赖。丽f窭_了郝件核心协议塞身并未定义任{可防。i1:这些戚胁的安令措施,来加保护的电予邮
2、件以明文形式在网络中传送,这强荔0
3、起挪俘内容的淹密。弱静盎连菠疆务器(POP)时,倦送豹簸证密码她址L;t}州文形J℃化送的,f-U村择拼·jf越tg,,NiGfill:鼎:,最终时撤I
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5、j什被盗、泄密等。为了解决这些闷题,}疆褒了安全恕r都嚣羽毛驿究。本论文诒:分析了传统pl:l子邮件中存存的的安全性问题后,研究了关于电子邮侮辫鞠关系裂海议,以及安全髹密蔽术京电予龆搏皆豹应灞,在完全遵覆旗荚耘准协议的撼础t,结合PKI技术和G/MIME,采用混合密粥体制,构建了实现安全l赵予郝纷豹蘩李瞧粲。筌、0:这令撰繁遵纾了系统f19惑钵浚诗翻谨缀设计,并
6、透过一些J=『一贝包实现了基于Pl(1的安全114f邮件系统。本系绶慧一个是青数豁擞赛和数字誉名动缝熙安全宅≯疼臀系统。渡系统漫供了电子}
7、iIj件的认证身份、不jJ西认rj:、完整性和僚密·I'L,有效地解决了传统电予瘗§嚣申存在麓安全妻乏越麓。关键运:数字签名,安全电予鄄穸{:,数戥糍密,8、andmoreenterpriseandindividualal’esendingandl-eceivinginfornlalionbyemail.However.therearesomesecurityproblemsinCOlllnlouusedemaitsystem,受rexample:imitation,interruptionandtampering,andrepudiation.Itdiscussesthecoresofemailprotocolsdon’tincludeanysafetyprecautionstOprotect‘email9、fromthesethreats。TheunprotectedmailsaretransmittedasplaintextthatiseasytobJ‘ingthedivulgingandtampering.Moreover,thepasswordneededforauthenticationisalsotransmittedasplaintextwhenaconnectiontoPOPserverisestablished,whichmayresultinthestealinganddivulgingoftheemail.Tosolvethesepr10、oblems,secureemailcomesout,Thisthesisdiscusstherelatedprotocolsofemailandapplicationsofcryptographytechnologiesforthemailprotectionafteranalyzingsecureproblemsoftraditionalemail,combinesPKItechniquewithS/MIMEsecureprotocolandadoptingthemixedciphersystem,putforwardachievingthefun11、damentalframeofsecureemailfollowingtheseprotocols.Accordingtothisframe,carrythroughthesystemtotaldesignandthesystemdetaileddesign,risesometoolpackagesrealizesecureemaijsystembasedonPKI.ThissystemisasectlreemailsystemprovidingDigitalSignatureandEncryption,whichhasthefollowingimpo12、rtantcharacteristics:confidentiality,authentica
8、andmoreenterpriseandindividualal’esendingandl-eceivinginfornlalionbyemail.However.therearesomesecurityproblemsinCOlllnlouusedemaitsystem,受rexample:imitation,interruptionandtampering,andrepudiation.Itdiscussesthecoresofemailprotocolsdon’tincludeanysafetyprecautionstOprotect‘email9、fromthesethreats。TheunprotectedmailsaretransmittedasplaintextthatiseasytobJ‘ingthedivulgingandtampering.Moreover,thepasswordneededforauthenticationisalsotransmittedasplaintextwhenaconnectiontoPOPserverisestablished,whichmayresultinthestealinganddivulgingoftheemail.Tosolvethesepr10、oblems,secureemailcomesout,Thisthesisdiscusstherelatedprotocolsofemailandapplicationsofcryptographytechnologiesforthemailprotectionafteranalyzingsecureproblemsoftraditionalemail,combinesPKItechniquewithS/MIMEsecureprotocolandadoptingthemixedciphersystem,putforwardachievingthefun11、damentalframeofsecureemailfollowingtheseprotocols.Accordingtothisframe,carrythroughthesystemtotaldesignandthesystemdetaileddesign,risesometoolpackagesrealizesecureemaijsystembasedonPKI.ThissystemisasectlreemailsystemprovidingDigitalSignatureandEncryption,whichhasthefollowingimpo12、rtantcharacteristics:confidentiality,authentica
8、andmoreenterpriseandindividualal’esendingandl-eceivinginfornlalionbyemail.However.therearesomesecurityproblemsinCOlllnlouusedemaitsystem,受rexample:imitation,interruptionandtampering,andrepudiation.Itdiscussesthecoresofemailprotocolsdon’tincludeanysafetyprecautionstOprotect‘email
9、fromthesethreats。TheunprotectedmailsaretransmittedasplaintextthatiseasytobJ‘ingthedivulgingandtampering.Moreover,thepasswordneededforauthenticationisalsotransmittedasplaintextwhenaconnectiontoPOPserverisestablished,whichmayresultinthestealinganddivulgingoftheemail.Tosolvethesepr
10、oblems,secureemailcomesout,Thisthesisdiscusstherelatedprotocolsofemailandapplicationsofcryptographytechnologiesforthemailprotectionafteranalyzingsecureproblemsoftraditionalemail,combinesPKItechniquewithS/MIMEsecureprotocolandadoptingthemixedciphersystem,putforwardachievingthefun
11、damentalframeofsecureemailfollowingtheseprotocols.Accordingtothisframe,carrythroughthesystemtotaldesignandthesystemdetaileddesign,risesometoolpackagesrealizesecureemaijsystembasedonPKI.ThissystemisasectlreemailsystemprovidingDigitalSignatureandEncryption,whichhasthefollowingimpo
12、rtantcharacteristics:confidentiality,authentica
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