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Where’s WikiLeaks ?. GEOLOCATION SERVICE. A Model Based Active Geolocation Service. S. Laki* , P. Mátray , P. Hága, T. Sebők, I. Csabai, G. Vattay. Spotter :. Sándor Laki* Eötvös Loránd University Budapest, Hungary [email protected]

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Where s wikileaks

Where’sWikiLeaks?


S laki p m tray p h ga t seb k i csabai g vattay

GEOLOCATION SERVICE

  • A Model Based ActiveGeolocation Service

S. Laki*, P. Mátray, P. Hága, T. Sebők, I. Csabai, G. Vattay

Spotter:

Sándor Laki*

Eötvös Loránd University

Budapest, Hungary

[email protected]

  • The Project was supported by the European Union and co-financed by the European Social Fund (grant agreement no. TAMOP 4.2.1./B-09/1/KMR-2010-0003).


Motivation

Motivation

  • Location information can be useful for both private and corporate users

    • Targeted advertising on the web

    • Restricted content delivery

    • Location-based security check

  • Scientific applications

    • Measurement visualization

    • Network diagnostics

    • Analysing spatial properties

    • of the Intenet


Ip geolocation in general

IP Geolocationingeneral

PassiveGeolocation

ActiveGeolocation

  • Geolinguistic

  • Registrybased

    • Whois, dns

    • Organizationalinfromation

  • Commercial databases

    • Maxmind, IPLigence, IP2Location, etc.

rt1.lon.uk.geant2.net

London, UK


Ip geolocation in general1

IP Geolocationingeneral

PassiveGeolocation

ActiveGeolocation

  • Geolinguistic

  • Registrybased

    • Whois, dns

    • Organizationalinfromation

  • Commercial databases

    • Maxmind, IPLigence, IP2Location, etc.

rt1.lon.uk.geant2.net

Large and geographicallydispersed IP blockscan be allocatedto a singleentity


Ip geolocation in general2

IP Geolocationingeneral

PassiveGeolocation

ActiveGeolocation

Activeprobing

Delay, topology, etc.

Landmarks

Withknownlocation

Locationestimatesforeachindividual IP addresses

  • Geolinguistic

  • Registrybased

    • Whois, dns

    • Organizationalinfromation

  • Commercial databases

    • Maxmind, IPLigence, IP2Location, etc.

rt1.lon.uk.geant2.net

Large and geographicallydispersed IP blockscan be allocatedto a singleentity


Active geolocation

Activegeolocation

?

Target

to be localized


Active geolocation1

Activegeolocation

Landmarkswithknownlocation


Active geolocation2

Activegeolocation

1010 ms

200 ms

501 ms

898 ms


Active geolocation3

Activegeolocation

Transformingdelaystogeographicaldistances


Where s wikileaks

Howtotransformnetworkdelaystogeographicaldistances?


Our delay distance model

Ourdelay–distancemodel

Referencedataset

  • Nodeswithknownlocation

  • ~700 PlanetLabnodes

  • Alltoall RTT measurements

    • mininmumdelays


Our delay distance model1

Ourdelay-distancemodel

  • Standardizedvalues, fitted normaldistribution

  • Approximatedby a standard normaldistribution

  • Geographicdistancesfollownormaldistribution

    • withparametersµ(t) and (t)for a givendelayt


Evaluation

Evaluation

The distances are normally distributed for a given RTT

Foreach RTT theradial profile is approximatedby a normaldistribution (m(d) and s(d))=> which defines the spatial probability distribution of the target


Evaluation triangulation

Evaluation – „Triangulation”

  • Landmarks:L1, … , Ln

  • DelaydifromLitoT: Lidi

  • The probabilitythattargetTresidesinregionH:


Performance analysis

Performance analysis

  • Estimatedaccuracyfor a geolocationgroundtruth

    • CAIDA’sGeolocationComparisionSurvey

    • More than20000 referencenodes

      • LocatedinNorthAmerica and in Europe

InNorthAmerica

70%

35%

40%

9%

27%

2%


The online service

The Online service


Sp o tter the geolocation service

Spotter - The geolocation service

  • online: free, easy to use

    • ~100 landmarks

    • Real timemeasurementsinthebackground

  • offline: batch mode

    • ~50k addresses/day

    • Fulllandmarkset

      • ~700 nodes

  • to fix:

    • DNS resolve problem

    • Sequentialqueuing

visit and use!http://spotter.etomic.org


Where s wikileaks

Where’sWikiLeaks?


Conclusion

Conclusion

  • Spotter is a measurementbasedgeolocation service available online

  • Basedon a probabilisticapproach

    • A noveldescription of delay-distancerelation

  • ValidatedonCAIDA’sGeolocationGroundTruth

    • 30 km and 75 km medianaccuracyinNorthAmerica and in Europe, resp.

      New challenges:

    • IPv6, Real timemeasurements, etc

    • The Internet topology and thedelaycharacteristicscould be changedinthefuture


Where s wikileaks

GEOLOCATION SERVICE

Thankyouforyourattention!

For more infopleasevisit

http://spotter.etomic.org

orsendme an email

[email protected] (Sándor Laki)


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