实用IT英语（第4版） 课件 Unit 10 Privacy and Security

PrivacyandSecurityUnit10实用IT英语（第4版）INFORMATIONCommunicationsTECHNOLOGYInthisunit,wearefocusingonthefollowingissues.adware;malware;spyware;Trojanhorses;antivirus;cloudantivirus;networkfirewallOutlineComputerviruses.Antivirussoftware.Computercrime.TipsonhowtoprotectyourPCfrominvasion.ProfessionalTerminologyDialogue:MyPoorComputerSection

2ReadingTextA:ComputerVirusesTextB:AntivirusSoftware,aGoodDefenderTextC:ComputerCrimeOccupationalTips:HowtoProtectYourPCfromInvasionClassActivities:DiscussiononUser-FriendlyFirewallsandAntivirusSoftwareCONTENTSSection

1Section

3Section

4Dialogue:MyPoorComputer01Directions:Readthefollowingdialogueinpairs.Situation:Attheairport,Matildahadsomeproblemswithhercomputer,soshedialedacomputerservicecenterphone,andaskedforsomeinformationabouthowtorepairit.Matilda:Hello,thisisaDellcomputeruser.Isthattherepaircenter?No.8768:HereisDELLComputerServiceCenter.ThisisNo.8768.WhatcanIdoforyou?Matilda:MycomputerisdownandIdon’tknowwhattodoaboutit.SystemRestorecan’tseemtofindWindows,either.No.8768:Canyouspeakatlengthaboutthissituation?Matilda:OK.Lastnight,mycomputerwasrunningfine.Thismorning,itwon’tboot.Rightafteritgetsdonewiththebios,Ijustgetaflashingcursor,whichneverprogressesanyfurther.Itcan’tgettothebootoptionsmenu,can’tgettosafemode,can’tevengetadamnWindowslogo.Dialogue:FirstDayatWork(HardwareOrientation)01No.8768:Priortothis,haveyouinstalledsoftwareorvisitedanillegalwebsite?Matilda:MyfirstthoughtwasthatthepiratedsoftwareIinstalledlastnightmight’vesneakedsomethingnastypastmyvirusscannerorjustscrewedupsomesettings.Also,Windowsinstalledanupdatebeforeshutdown!No.8768:Youshouldpayattentiontoprivacyandsecurity,anddonotinstallanyunknownsoftware.Then,didyoutesttorepairinsomeway?Matilda:IputmyinstallationdiskinthedriveandrebootedwiththethoughtthatIcouldjustrolleverythingbacktothemostrecentrestorepointandbeonmyway.Thatworksfine,inasmuchasIcangettotheinstallationmenuandeverything,butwhenIgetintoSystemRestorethedamnthingclaimsthatitcan’tfindWindowsonanyofmydrives.Mostalarming!No.8768:Don’tworry.Iwillinformthemaintenancestaffassoonaspossible!Matilda:OK.Anyway,Ihavenoideawhattodonext.Dialogue:FirstDayatWork(HardwareOrientation)01Notessystemrestore01speakatlengthaboutbiosaflashingcursorsafemode02030405计时卡；考勤卡系统恢复详细讲述英文BasicInputandOutputSystem的缩略语，是个人计算机启动时加载的第一个软件，用于计算机开机时执行系统各部分的自检，并启动引导程序或装载内存的操作系统公司内部网piratedsoftware01virusscannerinasmuchmaintenancestaf020304接待员；前台咨询文书工作；纸上作业扫描仪公司内部网Dialogue:MyPoorComputerSection

2ReadingTextA:ComputerVirusesTextB:AntivirusSoftware,aGoodDefenderTextC:ComputerCrimeOccupationalTips:HowtoProtectYourPCfromInvasionClassActivities:DiscussiononUser-FriendlyFirewallsandAntivirusSoftwareCONTENTSSection

1Section

3Section

4TextA:ComputerViruses01Acomputervirus(Figure10-1)isacomputerprogramthatcanreplicateitselfandspreadfromonecomputertoanother.Theterm“virus”isalsocommonly,buterroneouslyused,torefertoothertypesofmalware,includingbutnotlimitedtoadwareandspywareprogramsthatdonothaveareproductiveability.Virusescanincreasetheirchancesofspreadingtoothercomputersbyinfectingfilesonanetworkfilesystemorafilesystemthatisaccessedbyothercomputers.Figure10-1ComputerVirusTextA:ComputerViruses01Asstatedabove,theterm“computervirus”issometimesusedasacatch-allphrasetoincludealltypesofmalware,eventhosethatdonothavetheabilitytoreplicatethemselves.Malwareincludescomputerviruses,computerworms,Trojanhorses,mostrootkits,spyware,dishonestadwareandothermaliciousorunwantedsoftware,includingtrueviruses.VirusesaresometimesconfusedwithwormsandTrojanhorses,whicharetechnicallydifferent.Awormcanexploitsecurityvulnerabilitiestospreaditselfautomaticallytoothercomputersthroughnetworks,whileaTrojanhorseisaprogramthatappearsharmlessbuthidesmaliciousfunctions.WormsandTrojanhorses,likeviruses,mayharmacomputersystem’sdataorperformance.Somevirusesandothermalwarehavesymptomsnoticeabletothecomputeruser,butmanyaresurreptitiousorsimplydonothingtocallattentiontothemselves.Somevirusesdonothingbeyondreproducingthemselves.TextA:ComputerViruses01Anexampleofaviruswhichisnotamalware,butisputativelybenevolentisFredCohen’scompressionvirus.However,antivirusprofessionalsdonotaccepttheconceptofbenevolentviruses,asanydesiredfunctioncanbeimplementedwithoutinvolvingavirus(automaticcompression,forinstance,isavailableundertheWindowsoperatingsystematthechoiceoftheuser).Anyviruswillbydefinitionmakeunauthorisedchangestoacomputer,whichisundesirableevenifnodamageisdoneorintended.TheCreeperviruswasfirstdetectedonARPANET,theforerunneroftheInternet,intheearly1970s.Creeperwasanexperimentalself-replicatingprogramwrittenbyBobThomasatBBNTechnologiesin1971.CreeperusedtheARPANETtoinfectDECPDP-10computersrunningtheTENEXoperatingsystem.CreepergainedaccessviatheARPANETandcopieditselftotheremotesystemwherethemessage,“I’mthecreeper,catchmeifyoucan!”wasdisplayed.TheReaperprogramwascreatedtodeleteCreeper.TextA:ComputerViruses01Aprogramcalled“ElkCloner”wasthefirstpersonalcomputervirustoappear“inthewild”—thatis,outsidethesinglecomputerorlabwhereitwascreated.Writtenin1981byRichardSkrenta,itattacheditselftotheAppleDOS3.3operatingsystemandspreadviafloppydisk.Thisvirus,createdasapracticaljokewhenSkrentawasstillinhighschool,wasinjectedinagameonafloppydisk.Onits50thusetheElkClonerviruswouldbeactivated,infectingthepersonalcomputeranddisplayingashortpoembeginning“ElkCloner:Theprogramwithapersonality.”ThefirstIBMPCvirusinthewildwasabootsectorvirusdubbed(c)Brain,createdin1986bytheFarooqAlviBrothersinLahore,Pakistan,reportedlytodeterpiracyofthesoftwaretheyhadwritten.Beforecomputernetworksbecamewidespread,mostvirusesspreadonremovablemedia,particularlyfloppydisks.Intheearlydaysofthepersonalcomputer,manyusersregularlyexchangedinformationandprogramsonfloppies.Somevirusesspreadbyinfectingprogramsstoredonthesedisks,whileothersinstalledthemselvesintothediskbootsector,ensuringthattheywouldberunwhentheuserbootedthecomputerfromthedisk,usuallyinadvertently.TextA:ComputerViruses01Personalcomputersoftheerawouldattempttobootfirstfromafloppyifonehadbeenleftinthedrive.Untilfloppydisksfelloutofuse,thiswasthemostsuccessfulinfectionstrategyandbootsectorviruseswerethemostcommoninthewildformanyyears.Traditionalcomputervirusesemergedinthe1980s,drivenbythespreadofpersonalcomputersandtheresultantincreaseinBBS,modemuse,andsoftwaresharing.Bulletinboard-drivensoftwaresharingcontributeddirectlytothespreadofTrojanhorseprograms,andviruseswerewrittentoinfectpopularlytradedsoftware.SharewareandbootlegsoftwarewereequallycommonvectorsforvirusesonBBSs.Macroviruseshavebecomecommonsincethemid-1990s.MostofthesevirusesarewritteninthescriptinglanguagesforMicrosoftprogramssuchasWordandExcelandspreadthroughoutMicrosoftOfficebyinfectingdocumentsandspreadsheets.SinceWordandExcelwerealsoavailableforMacOS,mostcouldalsospreadtoMacintoshcomputers.Althoughmostofthesevirusesdidnothavetheabilitytosendinfectedemailmessages,thoseviruseswhichdidtakeadvantageoftheMicrosoftOutlookCOMinterface.TextA:ComputerViruses01AvirusmayalsosendaWebaddresslinkasaninstantmessagetoallthecontactsonaninfectedmachine.Iftherecipient,thinkingthelinkisfromafriend(atrustedsource)followsthelinktothewebsite,thevirushostedatthesitemaybeabletoinfectthisnewcomputerandcontinuepropagating.Virusesthatspreadusingcross-sitescriptingwerefirstreportedin2002,andwereacademicallydemonstratedin2005.Therehavebeenmultipleinstancesofthecross-sitescriptingvirusesinthewild,exploitingwebsitessuchasMySpaceandYahoo.TextA:ComputerViruses01adware01malwarespywareTrojanhorsesvulnerability02030405n.扬声器n.硬件n.显示器；监视器n.屏幕n.键盘NewWords&Expressionscreeper06n.麦克风DEC07abbr.［美］数据设备公司（DataEquipmentCompany）08091011floppydisksectorsharewarebootlegadj.非法制造或贩卖的n.软盘n.扇区n.共享软件TextA:ComputerViruses01Ⅰ.Answerthefollowingquestionsaccordingtothetext.Exercises1.Whatiscomputervirus?2.Inwhatwaycanvirusesincreasetheirchancesofspreadingtoothercomputersonanetworkfilesystemorafilesystemthatisaccessedbyothercomputers?3.Whendidtraditionalcomputervirusesemerge?4.Whatwillhappeniftherecipientthinkingthelinkisfromatrustedsourcefollowsthelinktothewebsite?5.Whenwerevirusesthatspreadusingcross-sitescriptingfirstreported?TextA:ComputerViruses01ExercisesⅡ.Fillintheblanksaccordingtothetext.1.TheCreeperviruswasfirstdetectedon____________,theforerunneroftheInternet,intheearly1970s.2.Theterm“computervirus”issometimesusedasacatch-allphrasetoincludealltypesofmalware,eventhosethatdonothavetheabilityto____________themselves.3.Somevirusesspreadby__________________storedonthesedisks,whileothersinstalledthemselvesintothediskbootsector,ensuringthattheywouldberunwhentheuserbootedthecomputerfromthedisk,usuallyinadvertently.4.Mostof____________arewritteninthescriptinglanguagesforMicrosoftprogramssuchasWordandExcelandspreadthroughoutMicrosoftOfficebyinfectingdocumentsandspreadsheets.5.Aprogramcalled“ElkCloner”wasthefirst_________________virustoappear“inthewild”—thatis,outsidethesinglecomputerorlabwhereitwascreated.ARPANETreplicateinfectingprogramsMacrovirusespersonal

computerTextB:AntivirusSoftware,aGoodDefender01Antivirusoranti-virussoftwareisusedtoprevent,detect,andremovemalware,includingbutnotlimitedtocomputerviruses,computerworms,Trojanhorses,spywareandadware.Computersecurity,includingprotectionfromsocialengineeringtechniques,iscommonlyofferedinproductsandservicesofantivirussoftwarecompanies.Thispagediscussesthesoftwareusedforthepreventionandremovalofmalwarethreats,ratherthancomputersecurityimplementedbysoftwaremethods.Avarietyofstrategiesaretypicallyemployed.Signature-baseddetectioninvolvessearchingforknownpatternsofdatawithinexecutablecode.However,itispossibleforacomputertobeinfectedwithnewmalwareforwhichnosignatureisyetknown.Tocountersuchso-calledzero-daythreats,heuristicscanbeused.Onetypeofheuristicapproach,genericsignatures,canidentifynewvirusesorvariantsofexistingvirusesbylookingforknownmaliciouscode,orslightvariationsofsuchcode,infiles.Someantivirussoftwarecanalsopredictwhatafilewilldobyrunningitinasandboxandanalyzingwhatitdoestoseeifitperformsanymaliciousactions.TextB:AntivirusSoftware,aGoodDefender01Nomatterhowusefulantivirussoftwarecanbe,itcansometimeshavedrawbacks.Antivirussoftwarecanimpairacomputer’sperformance.Inexperiencedusersmayalsohavetroubleunderstandingthepromptsanddecisionsthatantivirussoftwarepresentsthemwith.Anincorrectdecisionmayleadtoasecuritybreach.Iftheantivirussoftwareemploysheuristicdetection,successdependsonachievingtherightbalancebetweenfalsepositivesandfalsenegatives.Falsepositivescanbeasdestructiveasfalsenegatives.Finally,antivirussoftwaregenerallyrunsatthehighlytrustedkernelleveloftheoperatingsystem,creatingapotentialavenueofattack.Installedantivirussoftwarerunningonanindividualcomputerisonlyonemethodofguardingagainstviruses.Othermethodsarealsoused,includingcloud-basedantivirus,firewallsandon-linescanners.CloudantivirusCloudantivirusisatechnologythatuseslightweightagentsoftwareontheprotectedcomputer,whileoffloadingthemajorityofdataanalysistotheprovider’sinfrastructure.TextB:AntivirusSoftware,aGoodDefender01Oneapproachtoimplementingcloudantivirusinvolvesscanningsuspiciousfilesusingmultipleantivirusengines.ThisapproachwasproposedbyanearlyimplementationofthecloudantivirusconceptcalledCloudAV.CloudAVwasdesignedtosendprogramsordocumentstoanetworkcloudwheremultipleantivirusandbehavioraldetectionprogramsareusedsimultaneouslyinordertoimprovedetectionrates.Parallelscanningoffilesusingpotentiallyincompatibleantivirusscannersisachievedbyspawningavirtualmachineperdetectionengineandthereforeeliminatinganypossibleissues.CloudAVcanalsoperform“retrospectivedetection,”wherebytheclouddetectionenginerescansallfilesinitsfileaccesshistorywhenanewthreatisidentifiedthusimprovingnewthreatdetectionspeed.Finally,CloudAVisasolutionforeffectivevirusscanningondevicesthatlackthecomputingpowertoperformthescansthemselves.NetworkfirewallNetworkfirewallspreventunknownprogramsandprocessesfromaccessingthesystem.However,theyarenotantivirussystemsandmakenoattempttoidentifyorremoveanything.Theymayprotectagainstinfectionfromoutsidetheprotectedcomputerornetwork,andlimittheactivityofanymalicioussoftwarewhichispresentbyblockingincomingoroutgoingrequestsoncertainTCP/IPports.Afirewallisdesignedtodealwithbroadersystemthreatsthatcomefromnetworkconnectionsintothesystemandisnotanalternativetoavirusprotectionsystem.TextB:AntivirusSoftware,aGoodDefender01OnlinescanningSomeantivirusvendorsmaintainwebsiteswithfreeonlinescanningcapabilityoftheentirecomputer,criticalareasonly,localdisks,foldersorfiles.Periodiconlinescanningisagoodideaforthosethatrunantivirusapplicationsontheircomputersbecausethoseapplicationsarefrequentlyslowtocatchthreats.Oneofthefirstthingsthatmalicioussoftwaredoesinanattackisdisableanyexistingantivirussoftwareandsometimestheonlywaytoknowofanattackisbyturningtoanonlineresourcethatisn’talreadyinstalledontheinfectedcomputer.SpecialisttoolsVirusremovaltoolsareavailabletohelpremovestubborninfectionsorcertaintypesofinfection.ExamplesincludeTrendMicro’sRootkitBuster,andrkhunterforthedetectionofrootkits,Avira’sAntiVirRemovalTool,PCToolsThreatRemovalTool,andAVG’sAnti-Virus.Arescuediskthatisbootable,suchasaCDorUSBstoragedevice,canbeusedtorunantivirussoftwareoutsideoftheinstalledoperatingsystem,inordertoremoveinfectionswhiletheyaredormant.Abootableantivirusdiskcanbeusefulwhen,forexample,theinstalledoperatingsystemisnolongerbootableorhasmalwarethatisresistingallattemptstoberemovedbytheinstalledantivirussoftware.TextB:AntivirusSoftware,aGoodDefender01ExamplesofsomeofthesebootabledisksincludetheAviraAntiVirRescueSystem,PCToolsAlternateOperatingSystemScanner,andAVGRescueCD.TheAVGRescueCDsoftwarecanalsobeinstalledontoaUSBstoragedevice,whichisbootableonnewercomputers.NewWords&Expressions010203040506antivirussocialengineeringexecutablecodeheuristicssandboxkernelcloudantivirusnetworkfirewall onlinescanningn.反病毒程序；杀毒软件社会工程可执行代码n.启发法；启发式n.沙箱；沙盒；沙盒效应n.［计］内核n.云查杀网络防火墙在线扫描070809TextB:AntivirusSoftware,aGoodDefender01Ⅰ.Fillintheblanksaccordingtothetext.Exercises1.___________________softwareisusedtoprevent,detect,andremovemalware,includingbutnotlimitedtocomputerviruses,computerworms,Trojanhorses,spywareandadware.2.Avarietyofstrategiesaretypicallyemployed.Signature-baseddetectioninvolvessearchingforknownpatternsofdatawithin_____________code.However,itispossibleforacomputertobeinfectedwithnewmalwareforwhichnosignatureisyetknown.3._____________isatechnologythatuseslightweightagentsoftwareontheprotectedcomputer,whileoffloadingthemajorityofdataanalysistotheprovider’sinfrastructure.4.Someantivirusvendorsmaintainwebsiteswith____________________capabilityoftheentirecomputer,criticalareasonly,localdisks,foldersorfiles.5._______________canbeusedtorunantivirussoftwareoutsideoftheinstalledoperatingsystem,inordertoremoveinfectionswhiletheyaredormant.Ⅱ.Answerthefollowingquestionsaccordingtothetext.1.Whatisantivirus?2.Whydowesaythatnomatterhowusefulantivirussoftwarecanbe,itcansometimeshavedrawbacks?3.WhatisCloudAV?4.Whatisbootable?5.Whatiscloudantivirus?Antivirusoranti-virusexecutableCloudantivirusfreeonlinescanningArescuediskTextC:ComputerCrime01Computercrimereferstoanycrimethatinvolvesacomputerandanetwork.Thecomputermayhavebeenusedinthecommissionofacrime,oritmaybethetarget.NetcrimereferstocriminalexploitationoftheInternet.Cybercrimesaredefinedas:“Offencesthatarecommittedagainstindividualsorgroupsofindividualswithacriminalmotivetointentionallyharmthereputationofthevictimorcausephysicalormentalharmtothevictimdirectlyorindirectly,usingmoderntelecommunicationnetworkssuchasInternet(Chatrooms,emails,noticeboardsandgroups)andmobilephones(SMS/MMS)”.Suchcrimesmaythreatenanation’ssecurityandfinancialhealth.Issuessurroundingthistypeofcrimehavebecomehigh_x0002_profile,particularlythosesurroundingcracking,copyrightinfringement,andchildgrooming.Therearealsoproblemsofprivacywhenconfidentialinformationislostorintercepted,lawfullyorotherwise.Internationally,bothgovernmentalandnon-stateactorsengageincybercrimes,includingespionage,financialtheft,andothercross-bordercrimes.Activitycrossinginternationalbordersandinvolvingtheinterestsofatleastonenationstateissometimesreferredtoascyberwarfare.TheinternationallegalsystemisattemptingtoholdactorsaccountablefortheiractionsthroughtheInternationalCriminalCourt.TextC:ComputerCrime01DocumentedcasesOneofthehighestprofiledbankingcomputercrimeoccurredduringacourseofthreeyearsbeginningin1970.ThechieftellerattheParkAvenuebranchofNewYork’sUnionDimeSavingsBankembezzledover$1.5millionfromhundredsofaccounts.AhackinggroupcalledtheMOD(MastersofDeception),allegedlystolepasswordsandtechnicaldatafromPacificBell,Nynex,andothertelephonecompaniesaswellasseveralbigcreditagenciesandtwomajoruniversities.Thedamagecausedwasextensive,onecompany,SouthwesternBellsufferedlossesof$370,000alone.In1983,a19-year-oldUCLAstudentusedhisPCtobreakintoaDefenseDepartmentinternationalcommunicationssystem.Between1995and1998theNewscorpsatellitepaytoviewencryptedSKY-TVservicewashackedseveraltimesduringanon-goingtechnologicalarmsracebetweenapan-EuropeanhackinggroupandNewscorp.TheoriginalmotivationofthehackerswastowatchStarTrekre-runsinGermany,whichwassomethingthatNewscorpdidnothavethecopyrighttoallow.On26March1999,theMelissaworminfectedadocumentonavictim’scomputer,thenautomaticallysentthatdocumentandcopyofthevirusviae-mailtootherpeople.TextC:ComputerCrime01InFebruary2000aindividualgoingbythealiasofMafiaBoybeganaseriesdenial-of-serviceattacksagainsthighprofilewebsites,includingYahoo!,A,Dell,Inc.,E*TRADE,eBay,andCNN.AboutfiftycomputersatStanfordUniversity,andalsocomputersattheUniversityofCaliforniaatSantaBarbara,wereamongstthezombiecomputerssendingpingsinDDoSattacks.On3August2000,CanadianfederalprosecutorschargedMafiaBoywith54countsofillegalaccesstocomputers,plusatotaloftencountsofmischieftodataforhisattacks.TheRussianBusinessNetwork(RBN)wasregisteredasanInternetsitein2006.Initially,muchofitsactivitywaslegitimate.Butapparentlythefounderssoondiscoveredthatitwasmoreprofitabletohostillegitimateactivitiesandstartedhiringitsservicestocriminals.TheRBNhasbeendescribedbyVeriSignas“thebaddestofthebad”.ItoffersWebhostingservicesandInternetaccesstoallkindsofcriminalandobjectionableactivities,withanindividualactivitiesearningupto$150millioninoneyear.Itspecializedinandinsomecasesmonopolizedpersonalidentitytheftforresale.ItistheoriginatorofMPackandanallegedoperatoroftheStormbotnet.On2March2010,Spanishinvestigatorsbusted3ininfectionofover13millioncomputersaroundtheworld.The“botnet”ofinfectedcomputersincludedPCsinsidemorethanhalfoftheFortune1000companiesandmorethan40majorbanks,accordingtoinvestigators.TextC:ComputerCrime01InAugust2010theinternationalinvestigationOperationDelego,operatingundertheaegisoftheDepartmentofHomelandSecurity,shutdowntheinternationalpedophileringDreamboard.Thewebsitehadapproximately600members,andmayhavedistributedupto123terabytesofchildpornography(roughlyequivalentto16,000DVDs).TodatethisisthesinglelargestU.S.prosecutionofaninternationalchildpornographyring;52arrestsweremadeworldwide.NewWords&Expressions010203040506copyrightinfringementgroomingespionagefinancialtheft InternationalCriminalCourtn.版权；著作权n.侵犯；违反；侵权n.修饰n.间谍；间谍活动；刺探金融盗窃国际刑事法庭TextC:ComputerCrime01Ⅰ.Fillintheblanksaccordingtothetext.Exercises1._______________referstoanycrimethatinvolvesacomputerandanetwork.Thecomputermayhavebeenusedinthecommissionofacrime,oritmaybethetarget.2._____________aredefinedas:“Offencesthatarecommittedagainstindividualsorgroupsofindividualswithacriminalmotivetointentionallyharmthereputationofthevictimorcausephysicalormentalharmtothevictimdirectlyorindirectly,usingmoderntelecommunicationnetworks”.3.Oneofthehighestprofiledbankingcomputercrimeoccurredduringacourseofthreeyearsbeginningin1970.ThechieftellerattheParkAvenuebranchofNewYork’sUnionDimeSavingsBankembezzledover_____________fromhundredsofaccounts.4.In_____________theinternationalinvestigationOperationDelego,operatingundertheaegisoftheDepartmentofHomelandSecurity,shutdowntheinternationalpedophileringDreamboard.5.TheoriginalmotivationofthehackerswastowatchStarTrekre-runsinGermany,whichwassomethingthatNewscorpdidnothavethe_______________toallow.ComputercrimeCybercrimes$1.5millionAugust2010copyrightTextC:ComputerCrime01Ⅱ.Discussingroupsonthefollowingissues.Exercises1.Tellyourpartnerwhatyouknowaboutcomputercrime.2.Introducesomecomputercrimecasesthatyouknowtoyourclassmatesandtalkabouthowtoavoidit.Dialogue:MyPoorComputerSection

2ReadingTextA:ComputerVirusesTextB:AntivirusSoftware,aGoodDefenderTextC:ComputerCrimeOccupationalTips:HowtoProtectYourPCfromInvasionClassActivities:DiscussiononUser-FriendlyFirewallsandAntivirusSoftwareCONTENTSSection

1Section

3Section

4OccupationalTips:HowtoProtectYourPCfromInvasion01Directions:ReadthetipsonhowtoprotectyourPCfrominvasionandgrasptheimportantpoints.10TipstoProtectYourComputerfromVirusesTherearemanywaystoprotectyourcomputerfromnastyvirusesinvading.Protectingyourcomputerisanumberoneconcernforeverycomputeruseronearth.Hereare10waystoprotectyourcomputerandkeepyourfilesanddatasafe.

LearnaboutvirusesThefirstthingistoresearchandbecomeknowledgeableaboutviruses.

ArmyourselfwiththebestAnti-virussoftwaretosuityourneedsIfyoudonothaveprotectionagainstvirusesinstalledonyourcomputer,youwillwithoutadoubt,getaviruswithinthefirsthourofsurfingtheInternet.OccupationalTips:HowtoProtectYourPCfromInvasion013.RegularUpdatesHavingagreatAnti-virusprograminstalledonyourcomputertoprotectyourcomputerfromvirusesisg