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Word格式文档下载.docx

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Word格式文档下载.docx

《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Word格式文档下载.docx》由会员分享，可在线阅读，更多相关《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Word格式文档下载.docx（9页珍藏版）》请在冰豆网上搜索。

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