计算机英语教程 教学课件 作者 吕云翔 杨雪 林珣_ Unit 10.ppt

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1、Unit10ComputerSecurity计算机英语教程教学课件ContentsPart1ReadingandTranslatingSectionA:ComputerSecuritySectionB:ComputerVirusSectionC:FirewallPart2SimulatedWriting:BusinessLetterPart3ListeningandSpeakingDialogue:UsingAnti-virusSoftwareListeningComprehension:HackerandCrackerDictation:F

2、atheroftheMouse—DougEngelbart1.1ComputerSecurityIntroductionSecurityArchitectureHardwareMechanismsthatProtectComputersandDataSecureOperatingSystemsSecureCodingApplications1.1ComputerSecurityComplexSentencesOriginal:Iftheoperatingenvironmentisnotbasedoinasecureoperatingsyste

3、mcapableofmaintainingadomainforitsownexecution,andcapableofprotectingapplicationcodefrommalicioussubversion,andcapableofprotectingthesystemfromsubvertedcode,thenhighdegreesofsecurityareunderstandablynotpossible.Translation:如果操作环境不是基于一个安全的操作系统——能够维持自己的执行域，并能保护应用程序代码免受恶意破坏，以及

4、保护系统免受破坏代码损害，那么高安全程度是显然不可能的。1.1ComputerSecurityExercisesI.Readthefollowingstatementscarefully,anddecidewhethertheyaretrue(T)orfalse(F)accordingtothetext.___1．Computersecurityisabranchoftechnologyarrangedunderinformationsecuritycategory.___2．Physicallylimitingaccesstocompute

5、rsisapproximatelyoneofthestrongestapproachestoimprovecomputersecurity.___3．Computerprogrammingstrategiesareoftenconsideredasthemostdependentapproachforcomputersecurityamongothers.___4．Inaviation,transmittingunauthorizedcommunicationsoverspecificradiofrequenciesmayspoofairtr

6、afficcontrollersorsimplydisruptcommunicationsaltogether.___5．Theissuesofcomputersecurityareanindispensablepartofmaintaininganoperationalindustry.1.1ComputerSecurityII.Choosethebestanswertoeachofthefollowingquestions.1．Whatistheprimarydifferenceofcomputersecurityfromsomeothe

7、rcomputersciencefields?A．ItsvariedobjectivesB．ItspositiveenforceablerulesC．ItsnegativerequirementsD．ItsimpracticalformostcomputerprogramsC1.1ComputerSecurityII.Choosethebestanswertoeachofthefollowingquestions.2．Whichofthefollowingstrategiesisdemonstratedviatheexampleof“theB

8、ell-LaPadulamodel”belongs?A．SecureArchitectureB．SecureOperatingSystemsC．SecureCodi