abstract a privacy enhancing mechanism based on pseudonyms for identity protection in locat

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1、APrivacyEnhancingMechanismbasedonPseudonymsforIdentityProtectioninLocation-BasedServicesOliverJorns1,2,GeraldQuirchmayr2,3,OliverJung11TelecommunicationsResearchCenterVienna(ftw.)Donau-City-Strasse11220Vienna,AustriaEmail:{jorns,jung}@ftw.at2Departmentof

2、DistributedandMultimediaSystemsFacultyofComputerScienceUniversityofViennaLiebiggasse4/3-4,A-1010Vienna,AustriaEmail:{Oliver.Jorns,Gerald.Quirchmayr}@univie.ac.at3SchoolofComputerandInformationScienceDivisionofIT,EngineeringandtheEnvironmentUniversityofSo

3、uthAustraliaMawsonLakesSA5095,AustraliaEmail:{Gerald.Quirchmayr}@unisa.edu.auAbstractyearsresearchinthisfieldhasmadeexcellentprogressinmanyaspectsandthedevelopmentisamongstoth-OverthepastyearsMobileBusinesshasgainedsig-ersfosteredbytheevolutionofmobiledev

4、icesinnificantprogressnotonlybecauseofhighertransfertermsofprocessingpower,memoryandprovidednet-ratesaswellasadvancedprocessingpowerandmem-workinterfacessuchasGPRS,WLANandBluetooth.orycapabilitiesofnetworksandmobiledevicesbutAtthesametimenetworkoperatorsg

5、raduallyallowalsobecauseofnovellocation-basedmobileapplica-accesstopreviouslyhiddenlocationandmessageser-tionswhichraisemanyexpectationsinthemobileviceswhichinturnleadstoanewclassofservicemarket.Asaresultnetworkoperatorsstarttoof-providers.Theyallowindep

6、endentserviceproviderfertheirservicesto3rdpartyapplicationprovidersaccesstonetworkservicesthroughstandardisedin-whichfostersthedevelopmentofinnovativeapplica-terfacessuchasParlayX(2006).tions.However,todaymobileapplicationsareforcedOneconceptthatisbasedo

7、nthesetechnologiestooperateintherestrictedenvironmentofonenet-isthesocalledlocation-basedservice.Eventhoughworkoperatorwhichisrathercumbersomefortheithasgraduallydevelopedoverseveralyearsitdiddevelopmentofnovellocation-basedmobileapplica-notturnouttobeth

8、e”killerapplication”thatitwastionsthatneedtoexchangelocationdatabetweenpredictedtobecomesomeyearsago.Junglas(2005)differentnetworkoperators,overdifferentcountries.referstomarketpredictionswhichstatethatby2005Inthispaperwedis