密码编码学与网络安全习题答案

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1、SolutionsManualCRYPTOGRAPHYANDNETWORKSECURITYPrinciplesandPracticeFourthEditionWilliamStallings-105-Copyright2006:WilliamStallings-105-©2006byWilliamStallingsAllrightsreserved.Nopartofthisdocumentmaybereproduced,inanyformorbyanymeans,orpostedontheInternet,withoutpermissioninw

2、ritingfromtheauthor.-105-NoticeThismanualcontainssolutionstoallofthereviewquestionsandhomeworkproblemsinCryptographyandNetworkSecurity,FourthEdition.Ifyouspotanerrorinasolutionorinthewordingofaproblem,Iwouldgreatlyappreciateitifyouwouldforwardtheinformationviaemailtows@shore.

3、net.Anerratasheetforthismanual,ifneeded,isavailableatftp://shell.shore.net/members/w/s/ws/S.W.S.TABLEOFCONTENTSChapter1:Introduction5Chapter2:ClassicalEncryptionTechniques7Chapter3:BlockCiphersandtheDateEncryptionStandard13Chapter4:FiniteFields21Chapter5:AdvancedEncryptionSta

4、ndard28Chapter6:MoreonSymmetricCiphers33Chapter7:ConfidentialityUsingSymmetricEncryption38Chapter8:IntroductiontoNumberTheory42Chapter9:Public-KeyCryptographyandRSA46Chapter10:KeyManagement;OtherPublic-KeyCryptosystems55Chapter11:MessageAuthenticationandHashFunctions59Chapter

5、12:HashandMACAlgorithms62Chapter13:DigitalSignaturesandAuthenticationProtocols66Chapter14:AuthenticationApplications71Chapter15:ElectronicMailSecurity73Chapter16:IPSecurity76Chapter17:WebSecurity80Chapter18:Intruders83Chapter19:MaliciousSoftware87Chapter20:Firewalls89-105-Cha

6、pter1IntroductionAnswerstoQuestions1.1TheOSISecurityArchitectureisaframeworkthatprovidesasystematicwayofdefiningtherequirementsforsecurityandcharacterizingtheapproachestosatisfyingthoserequirements.Thedocumentdefinessecurityattacks,mechanisms,andservices,andtherelationshipsam

7、ongthesecategories.1.2Passiveattackshavetodowitheavesdroppingon,ormonitoring,transmissions.Electronicmail,filetransfers,andclient/serverexchangesareexamplesoftransmissionsthatcanbemonitored.Activeattacksincludethemodificationoftransmitteddataandattemptstogainunauthorizedacces

8、stocomputersystems.1.3Passiveattacks:releaseofmessagecontentsandtraf