Thatthesedemandshaveemergedinthespanofonlyafewyearsatteststowhatwecallthe‘closings’ofcyberspace.ThesedemandsandtheirclosingsareeffectsofthewayinwhichactingthroughtheInternethasresignifiedquestionsofvelocity,extensity,anonymity,andtraceability.Velocitycallsforregularandongoingvigilanceaboutrapidlychangingtechnologies,protocols,practices,platforms,andrulesaboutbeingdigital;extensitycallsforawarenessofwhereandtowhomdigitalactionsreach;anonymitycallsforlimitingandprotectingexposureandbeingcautiousaboutthepresumedidentitiesofothers;andtraceabilitycallsformanaginghowactionsaretracked,analysed,manipulated,andsortedbyunknownothersandforunknowablepurposes.Allofthesedemandsspringnotfromparticipating,connecting,andsharingalonebuttherelationsbetweenandamongbodiesactingthroughtheInternet,whichismadeupofconventionsconfiguredbytheactionsofdispersedanddistributedauthorities.Itistotheseconfiguringactions,whichwecalltheclosingsofcyberspace,thatweturntointhenextchapter,withafocusonfiltering,tracking,andnormalizing.

Ifwedistinguishprivacyfromanonymity,werealizethatanonymityontheInternethasspawnedanewpoliticaldevelopment.Ifprivacyistherighttodeterminewhatonedecidestokeeptoherselfandwhattosharepublicly,anonymityconcernstherighttoactwithoutbeingidentified.ThesecondconcernsthevelocityofactingthroughtheInternet.Forbetterorforworse,itisalmostpossibletoperformanactontheInternetfasterthanonecanthink.ThethirdconcernstheextensityofactingthroughtheInternet.ThenumberofaddresseesanddestinationsthatarepossibleforactingthroughtheInternetisstaggering.So,too,aretheboundaries,borders,andjurisdictionsthatanactcantraverse.Thefourthconcernstraceability.IfitisperformedontheInternet,anactcanbetracedinwaysthatarepracticallyimpossibleoutsidetheInternet.Takentogether,anonymity,velocity,extensity,andtraceabilityarequestionsthatareresignifiedbybodiesactingthroughtheInternet