网络信息安全英语

演讲人：日期：网络信息安全英语目录IntroductionFundamentalsofNetworkInformationSecurityCryptographyandEncryptionTechnologyFirewallsandIntrusionDetectionSystemsMalicioussoftwarepreventionandremovalmethodsDataprotectionandrecoverytechnology01IntroductionToprovidestudentswithacomprehensiveunderstandingofnetworkinformationsecurityconcepts,principles,andpracticesPurposeWiththerapiddevelopmentofinformationtechnology,networksecurityhasbecomeacriticalissuefororganizationsandindividualsalikeBackgroundPurposeandbackgroundCoursecontentCoversfundamentalconceptssuchascryptography,networkprotocols,andattack/defensetechnologiesLearningoutcomesStudentswilldevelopskillsinidentifyingandmitigatingnetworksecuritythreats,aswellasgainanunderstandingoflegalandethicalissuesrelatedtoinformationsecurityTeachingmethodsIncludeslectures,laboratorysessions,andgroupdiscussionstoenhanceunderstandingandpracticalapplicationofconceptsCourseOverviewAssessmentAssessedthroughacombinationofwrittenassignments,practicalexercises,andexamsCourseOverview02FundamentalsofNetworkInformationSecurityConfidentialityEnsuringthatinformationisaccessibleonlytothoseauthorizedtohaveaccessIntegrityProtectingtheaccuracyandcompletenessofinformationandsystemsAvailabilityEnsuringthatauthorizedusershavetimelyandrelatedaccesstoinformationandsystemsConceptofInformationSecurityTypesofcellattachmentsMalwareAttacksInvolvingviruses,words,trojans,spyware,andothermalicioussoftwarePhishingAttacksUsingfraudulentemailsorwebsitestotrickusersintorevealingsensitiveinformationDenialofService(DoS)AttacksOverloadingsystemswithrequeststomakethemunavailabletolegalusersManintheMiddle(MitM)AttacksInterceptingcommunicationsbetweentwopartstosteeloralterinformationFirewallsandIntrusionDetection/PreventionSystems(IDS/IPS)MonitoringandcontrollingincomingandoutgoingnetworktraffictoblockmaliciousactivityEncryptionConvertingsensitiveinformationintoasecurecodetoprotectitfromunauthorizedaccessAccessControlandIdentityManagementRestrictingaccesstosystemsanddatabasedonuseridentitiesandprivilegesRegularUpdatesandPatchManagementKeepingsystemsandsoftwareuptodatewiththelatestsecuritypatchesandupdatesDefenseStrategyandTechnology03CryptographyandEncryptionTechnologyConfidentialityEnsuringthatinformationisaccessibleonlytothoseauthorizedtohaveaccessAuthenticationVerifyingtheidentityofauser,process,ordevice,oftenasaprerequisitetoallowaccesstoresourcesinasystemNonreportingPreventingentitiesfromdeningpreviouscommitmentsoractionsIntegrityGuarantyingthatinformationandsystemsarechangedonlyinaspecifiedandauthorizedmanagerPrinciplesofCryptographySymmetricEncryptionUsethesamesecretkeyforbothencryptionanddecryptionExamplesincludeAES(AdvancedEncryptionStandard)andDES(DataEncryptionStandard)AsymmetricEncryptionUsetwodifferentkeys,oneforencryptionandtheotherfordecryptionAlsoknownaspublickeyencryptionExamplesincludeRSA(RivestShamirAdleman)andECC(EllipticCurveCryptography)HybridEncryptionCombinessymmetricandasymmetricencryptiontoachievehigherlevelsofsecurityandefficiencyIntroductiontoCommonEncryptionAlgorithmsEncryptingdatatransmittedovernetworkstopreventeavesdroppingandsamplingSecureCommunicationsProtectingsensitivedatastoredoncomputersandotherdevicesfromunauthorizedaccessDataStorageUsingencryptiontoauthenticateusersandcontrolaccesstoresourcesIdentityandAccessManagementEnablingmultiplepartstojoincomputeafunctionovertheirinputswhilekeepingthoseinputsprivateSecureMultipartyComputingApplicationscenariosofencryptiontechnology04FirewallsandIntrusionDetectionSystemsFirewallsmonitorandcontrolincomingandoutgoingnetworktrafficbasedonpredefinedsecurityrulesTheycreateabarrierbetweeninternalandexternalnetworks,allowingonlyauthorizedtraffictopassthroughWorkingPrincipleFirewallscanbeclassifiedintodifferenttypesbasedontheirdeploymentlocation,suchashostbasedfirewallsandnetworkbasedfirewallsAdditionally,theycanbecategorizedbasedontheirfunctionality,includingpacketfilteringfirewalls,statefulinspectionfirewalls,andproxyserversClassificationTheworkingprincipleandclassificationoffirewallsPurposeIDSaredesignedtodetectunauthorizedactivitiesorintrusionsinanetwork.TheymonitornetworktrafficandsystemlogstoidentifysurveillancepatternsthatmayindicateanattackTypesIDScanbeclassifiedintotwomaintypes:hostbasedIDS(HIDS)andnetworkbasedIDS(NIDS)HIDSmonitorindividualhostsforsurveillanceactivity,whileNIDSmonitornetworktrafficforsignsofintrusionsOverviewofIntrusionDetectionSystems(IDS)DetectionMethodsIDSusesavarietyofdetectionmethods,includingsignaturebaseddetection,arbitrarybaseddetection,andheuristicbaseddetectionSignaturebaseddetectiondependsonpredefinedpatternstoidentifyknownattachments,whileanybaseddetectionidentifiesdeviationsfromnormalbehaviorHeritagebaseddetectionusesrulesoralgorithmstodetectpotentialthreatsOverviewofIntrusionDetectionSystems(IDS)FirewallConfigurationWhenconfiguringafirewall,itisimportanttoconsiderthesecurityrequirementsofthenetworkandthetypesoftrafficthatneedtobeallowedorblockedAdditionally,firewallsshouldberegularlyupdatedwiththelatestsecuritypatchesandrulestoprotectagainstnewthreatsIDSDeploymentandTurningIDSshouldbedeployedinstrategiclocationswithinthenetworktomaximizecoverageanddetectpotentialintrusionsAdditionally,IDSneedstobetunedandconfiguredtoreducefalsepositivesandensureaccuratedetectionofthreatsThismayinvolvecreatingcustomsignaturesoradjustingdetectionthresholdsbasedonthenetworkenvironmentConfigurationandManagementStrategiesConfigurationandManagementStrategiesOngoingMonitoringandMaintenanceOngoingmonitoringoffirewallandIDSlogsiscriticaltoidentifyandrespondtopotentialthreatsinatimelymannerAdditionally,regularmaintenanceactivitiessuchasupdatingsignatures,reviewingsecuritypolicies,andperformingsystemauditshelpensuretheeffectivenessofthesesecuritymeasures05MalicioussoftwarepreventionandremovalmethodsTypesandcharacteristicsofmalwareVirusesMaliciousprogramsthatattachthemtootherfiles,replicate,andspreadthroughasystemTheycancausedamagetodataanddisruptsystemoperationsWordsStandaloneprogramsthatreplicatethemandspreadthroughnetworkvulnerabilitiesTheyconsultnetworkresourcesandcanleadtosystemcrashesTrojanhorsesMalwarethatdistinguishesitselfaslegalsoftwareOnceactivated,itcangrantattackersaccesstotheaffectedsystemSpywareSoftwarethatcollectspersonalinformationwithouttheuser'sknowledgeorconsentItcanmonitoruseractivity,steelpasswords,andtransientsensitivedatatothirdpartiesTypesandcharacteristicsofmalwareSuggestionsforproactivemeasuresKeepsoftwareuptodateRegularlyupdateoperatingsystems,browsers,andotherapplicationstopatchknowledgevulnerabilityUsestrongantivirussoftwareInstallandregularlyupdateantivirussoftwaretodetectandremovemalwareAvoidancesuspiciouswebsitesandemailsDonotclickonlinksoropenattachmentsfromunknownortrustedsourcesUsefirewallsConfigurefirewallstoblockunauthorizedaccesstoyoursystemManualremovalThismethodrequirestechnicalexpertiseandinvestmentsidentifyinganddeletingmalignantfilesandregistryentriesAntivirussoftwareMostantivirusprogramscandetectandremoveawiderangeofmalwareMakesuretokeepyourantivirussoftwareuptodateMalwareremovaltoolsSpecializedtoolsareavailabletoremovestubbornmalwarethatmayhaveevolvedantivirusdetectionThesetoolsareoftenrequiredlesstechnicalexpertisetouseeffectivelyCleaningmethodsandtoolsSystemrestoreIfyoursystemhasbeenaffectedwithmalware,youmaybeabletousesystemrestoretorollbacktoaprevious,unknownstateHowever,thisoptionmaynotbeavailableifthemalwarehasdisabledsystemrestoreorifyouhavenotcreatedanyrestorepointsCleaningmethodsandtools06DataprotectionandrecoverytechnologyIdentifycriticaldataDeterminewhichdataisessentialforbusinesscontinuityandneedstobebackedupregularlySelectbackuptypesChoosefromfull,incremental,ordifferentialbackupsbasedondataimportance,recoverytimeobjectives(RTOs),andrecoverypointobjectives(RPOs)DeterminebackupfrequencyDecidehowoftentobackupdatabasedonfactorssuchasdatachangefrequencyandbusinessrequirementsDevelopmentofdatabackupstrategySelectbackupstoragemediaChooseappropriatestoragemediasuchastape,disk,orcloudstoragebasedoncost,capacity,anddurabilityconsiderationsDevelopmentofdatabackupstrategyDatarecoveryoperationprocess01Identifytheneedforrecovery:Determin