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发布时间:2020-02-11 14:11      来源:网络整理      作者:admin

      起源:综合自互联网络,由中国CIA考网【www.万博体育平台app.cn】整宣布,原创篇,未经授权请勿转载,若需引证或转载,请注明起源!__向笔者讯问。

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      参考链接1.,Inthisarticle,wewilllearnaboutthefamousCIATriadi.e.Confidentiality,Integrity,andAvailability.Thoughthesetermssoundsimple,theyhavegoodoutreachandsecuritypostureisadequateforanorganizationiftheconceptsofCIAarewellmaintained.Itisthesethreeprinciplesthatoftenexploitedthroughvaryingdegreesofexploits/attacks.Let’sdiscusstheseconceptsindetail.ConfidentialityConfidentialityrevolvesaroundtheprincipleof‘leastprivilege.’Thisprinciplestatesthataccesstoinformation,assets,etc.shouldbegrantedonlyonaneedtoknowbasissothatinformationwhichisonlyavailabletosomeshouldnotbeaccessiblebyeveryone.Asyoumighthaveguessedalready,thecoreforgoodconfidentiality,orneedtoknow,theprincipleisastrongdataclassificationpolicy.SincewithoutclassifyingAssets,Information,etc.itwilldifficulttomaintainwhohasaccesstowhat.TherearevariouslevelsinwhichtheclassificationcanbedoneconsideringthecriticalityofthatAsset,Information,etc.Iamsurewhoarenewtothisconceptmustbewonderingisn’tthatauthenticationwhereassomemightbealigningitwithauthorization.Sohereiswhatyouneedtoknow:Identification,Authentication,andAuthorizationareprincipleswhichareachievedthroughvariousaccessandprivacycontrolsthatsupportConfidentiality.Forexample,IfAuthenticationprinciplehasfailedthentheunderlyinginformationcanbestolenwhichshouldbedeniedasperconfidentiality.Forexample,datasentoverawirecanbesniffedorstoredinUSBcanbestolen.Ontheotherhand,encryptionprocesssupportsconfidentialitysinceitprotects(ifusedcorrectly)anysensitiveinformationfrombeingstolenorleakagebyconvertingtheplaintextintociphertextwhichcannotbereadeasily.Itshouldbenotedthattherearevariousalgorithmsforencryption,butitisuptoindividual/organizationtoselectonlystrongones.IntegrityIntegritymakessurethattheinformationisnottamperedwheneverittravelsfromsourcetodestinationorevenstoredatrest.Informationstoredinunderlyingsystems,databases,etc.mustbeprotectedthroughaccesscontrolsandthereshouldbeanacceptedproceduretochangethestored/transitdata.AnexampleofIntegritywhichisusedbymanytoolsis‘onewayhashes’whereinahashofaparticularsetofdataiscalculatedbeforetransitandissentalongwiththeoriginalmessage.Attherecipientside,thehashismessagereceivediscomputedandiscomparedwiththehashreceived.Ifbothhashesaredifferent,itmeansthatthemessagehaslostitsvalue.AvailabilityAvailabilityconceptistomakesurethattheservicesofanorganizationareavailable.Forexample,ifyouhavebeenfollowingpress,thenrecentlytherewasanewsofaDistributedDenialofService(DDoS)attacktargetedtowardsDyn,KrebsOnSecurity,BBC,etc.ThemotivebehindtheseattacksistobringdowntherespectiveservicesandthereforetodefeatAvailability.However,availabilitycanalsobedefeatedthroughsomeotherdisasterswhichcanbeman-madeorthroughnature(likeanearthquake,floods,etc.).Generally,companiestriedtodevelopsystemswhicharefaulttolerantwhichisachievedthroughredundantsystems/drives,etc.Incaseofdisaster,theconceptofalternatesitesisusedwhicharefurtherclassifiedintohot,warmandcoldsiteswhereahotsiteisreadytorunbusinesswithminimaldisruptionasisreplicaoverthealreadyrunningenvironment.Acoldsiteisajustasitewithphysicalfacilitiesandneedofficesetuptobedone.TheimportanceofthewholeCIATriadisequallyimportant,however,sometimesweneedtogiveimportancetooneofthemoracombinationofthemovertheotherasperthecontext.Forexample:Let’sassumeweareexaminingproprietaryinformationandfindingpriorityamongCIATriadtoassignto.Inthiscase,sinceitisproprietary,thepriorityandimportanceshouldbeConfidentialityi.e.limitingaccesstotheunderlyinginformationitself.Inanotherexampleconsiderthescenariooffinan万博体育平台applinformationinabankwhichissupposedtobeprotected.Inthiscase,importancewillbetoprotecttheintegrityoftheunderlyinginformationsothatallthetransactionsholdtheirtruevalue.Let’snowconsiderthecasewhensometypeofinformationisavailableforpublicconsumption.NowinthiscaseAvailabilitywillholdtheprioritybecausethatisthemainmotiveforthisinformationtothepublic.ConfidentialitywillnotbeanissueinthissinceitisavailabletoeveryonewhereasIntegrityholdslowerprioritythanAvailability.NewchallengesforCIA:Withtheadvancementoftechnologies,newchallengesareposedfortheCIATriad.Someare:InternetofThings(IoT)–Itsadoptioniscomingintotheindustry;itposessomechallenges.FirstisthesecurityiftheseIoTdevicessincetherearenumerouswaysalreadydiscoveredtobreakadevicesecurityandoftenpatchesarenotreleasedforthesedevicesthatquickly.Itwillalsoleadtoprivacyconcernsincemoreusageofthesedevicesbythepublicwillleadtomorepersonaldataatrisk.BigData—Datacomesinvariousformsandflavors,anditisofparamountimportancetoclassifythoseandimplementappropriateaccesscontrolaroundthem.So,CIATriadisthreeconceptswhichhavevastgoals(ifnoendgoals)inInformationSecuritybutwithnewtypesofattackslikeinsiderthreats,newchallengesposedbyIoT,etc.itnowbecomesevenmoredifficulttolimitandscopethese3principlesproperly.,

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