计算机网络 外文文献 外文翻译 英文文献 新技术的计算机网络.docx
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计算机网络 外文文献 外文翻译 英文文献 新技术的计算机网络.docx
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计算机网络外文文献外文翻译英文文献新技术的计算机网络
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一、原文
Newtechniqueofthecomputernetwork
Abstract
The21centuryisanagesoftheinformationeconomy,beingthecomputernetworktechniqueofrepresentativetechniquesthisages,willbeatveryfastspeeddevelopsoonincontinuouslycreatively,andwillgodeepintothepeople'swork,lifeandstudy.Therefore,controlthistechniqueandthenseemtobemoretodelivertheimportance.NowImainlyintroducethenewtechniqueofafewnetworksinactualityliveofapplication.
keywords
Internet DigitalCertificates DigitalWallets GridStorage
1.Foreword
Internetturns36,stillaworkinprogress
Thirty-sixyearsaftercomputerscientistsatUCLAlinkedtwobulkycomputersusinga15-footgraycable,testinganewwayforexchangingdataovernetworks,whatwouldultimatelybecometheInternetremainsaworkinprogress.
Universityresearchersareexperimentingwithwaystoincreaseitscapacityandspeed.ProgrammersaretryingtoimbueWebpageswithintelligence.Andworkisunderwaytore-engineerthenetworktoreduceSpam(junkmail)andsecuritytroubles.
Allthewhilethreatsloom:
Criticswarnthatcommercial,legalandpoliticalpressurescouldhinderthetypesofinnovationsthatmadetheInternetwhatitistoday.
StephenCrockerandVintonCerfwereamongthegraduatestudentswhojoinedUCLAprofessorLenKleinrockinanengineeringlabonSept.2,1969,asbitsofmeaninglesstestdataflowedsilentlybetweenthetwocomputers.ByJanuary,threeother"nodes"joinedthefledglingnetwork.
Thencamee-mailafewyearslater,acorecommunicationsprotocolcalledTCP/IPinthelate70s,thedomainnamesysteminthe80sandtheWorldWideWeb-nowthesecondmostpopularapplicationbehinde-mail-in1990.TheInternetexpandedbeyonditsinitialmilitaryandeducationaldomainintobusinessesandhomesaroundtheworld.
Today,CrockercontinuesworkontheInternet,designingbettertoolsforcollaboration.AndassecuritychairmanfortheInternet'skeyoversightbody,heistryingtodefendthecoreaddressingsystemfromoutsidethreats.
HeacknowledgestheInternethehelpedbuildisfarfromfinished,andchangesareinstoretomeetgrowingdemandsformultimedia.Networkprovidersnowmakeonly"bestefforts"atdeliveringdatapackets,andCrockersaidbetterguaranteesareneededtopreventtheskipsandstuttersnowcommonwithvideo.
Cerf,nowatMCIInc.,saidhewishedhecouldhavedesignedtheInternetwithsecuritybuilt-in.MicrosoftCorp.YahooInc.andAmericaOnlineInc.,amongothers,arecurrentlytryingtoretrofitthenetworksoe-mailsenderscanbeauthenticated-awaytocutdownonjunkmessagessentusingspoofedaddresses.
Manyfeaturesbeingdevelopedtodaywouldn'thavebeenpossibleatbirthgiventheslowercomputingspeedsandnarrowerInternetpipes,orbandwidth,Cerfsaid.
2.DigitalCertificates
DigitalcertificatesaredatafilesusedtoestablishtheidentityofpeopleandelectronicassetsontheInternet.Theyallowforsecure,encryptedonlinecommunicationandareoftenusedtoprotectonlinetransactions.
Digitalcertificatesareissuedbyatrustedthirdpartyknownasacertificationauthority(CA).TheCAvalidatestheidentityofacertificateholderand“signs”thecertificatetoattestthatithasn’tbeenforgedoralteredinanyway.
NewUsesForDigitalCertificates
Digitalcertificatesarenowbeingusedtoprovidesecurityandvalidationforwirelessconnections,andhardwaremanufacturersareoneofthelatestgroupstousethem.Notlongago,VersionInc.announceditsCableModemAuthenticationServices,whichallowhardwaremanufacturerstoembeddigitalcertificatesintocablemodemstohelppreventthepiratingofbroadbandservicesthroughdevicecloning.
UsingVersionsoftware,hardwaremakerscangeneratecryptographickeysandcorrespondingdigitalcertificatesthosemanufacturersorcableserviceproviderscanusetoautomaticallyidentifyindividualmodems.
This‘ast-mile’authenticationnotonlyprotectsthevalueofexistingcontentandservicesbutalsopositionscablesystemoperatorstobringabroadnewrangeofcontent,applicationsandvalue-addedservicestomarket.
WhenaCAdigitallysignsacertificate,itsownercanuseitasanelectronicpassporttoprovehisidentity.ItcanbepresentedtoWebsites,networksorindividualsthatrequiresecureaccess.
Identifyinginformationembeddedinthecertificateincludestheholder’snameande-mailaddress,thenameoftheCA,aserialnumberandanyactivationorexpirationdataforthecertificate.WhentheCAverifiesauser’sidentity,thecertificateusestheholder’spublicencryptionkeytoprotectthisdata.
CertificatesthataWebserverusestoconfirmtheauthenticityofaWebsiteforauser’sbro
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