完形填空
题干:TheInternetaffordsanonymitytoitsusers,ablessingtoprivacyandfreedomofspeech.Butthatveryanonymityisalsobehindtheexplosionofcyber-crimethathas(1)acrosstheWeb.Canprivacybepreserved(2)bringingsafetyandsecuritytoaworldthatseemsincreasingly(3)?Lastmonth,HowardSchmidt,thenation’scyber-czar,offeredthefederalgovernmenta(4)tomaketheWebasaferplace—a“voluntarytrustedidentity”systemthatwouldbethehigh-tech(5)ofaphysicalkey,afingerprintandaphotoIDcard,allrolled(6)one.Thesystemmightuseasmartidentitycard,oradigitalcredential(7)toaspecificcomputer,andwouldauthenticateusersatarangeofonlineservices.Theideaisto(8)afederationofprivateonlineidentitysystems.Userscould(9)whichsystemtojoin,andonlyregistereduserswhoseidentitieshavebeenauthenticatedcouldnavigatethosesystems.TheapproachcontrastswithonethatwouldrequireanInternetdriver’slicense(10)bythegovernment.GoogleandMicrosoftareamongcompaniesthatalreadyhavethese“singlesign-on”systemsthatmakeitpossibleforusersto(11)justoncebutusemanydifferentservices.(12),theapproachwouldcreatea“walledgarden”incyberspace,withsafe“neighborhoods”andbright“streetlights”toestablishasenseofa(13)community.Mr.Schmidtdescribeditasa“voluntaryecosystem”inwhich“individualsandorganizationscancompleteonlinetransactionswith(14),trustingtheidentitiesofeachotherandtheidentitiesoftheinfrastructure(15)whichthetransactionruns”.Still,theadministration’splanhas(16)privacyrightsactivists.Someapplaudtheapproach;othersareconcerned.Itseemsclearthatsuchaschemeisaninitiativepushtowardwhatwould(17)beacompulsoryInternet“driver’slicense”mentality.Theplanhasalsobeengreetedwith(18)bysomecomputersecurityexperts,whoworrythatthe“voluntaryecosystem”envisionedbyMr.SchmidtwouldstillleavemuchoftheInternet(19).TheyarguethatallInternetusersshouldbe(20)toregisterandidentifythemselves,inthesamewaythatdriversmustbelicensedtodriveonpublicroads.
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