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On the Privacy of Real-World

Friend-Finder Services

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OUTLINE

1. Introduction

2. Objective

3. Existing Systems

4. Proposed System

5. Literture Survey

!. s"# nd $"# re%uirements

&. 'onc(usion

). *e+erences

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INTRODUCTION

Location-based services (LBS) are computer program-level services used to includespecific controls for location and time data as control features

LBS is an information services and has a number of uses in social networking today asan entertainment service

It is ccessib(e #it$ mobi(e devices t$roug$ t$e mobi(enet#or- nd #$ic$ uses in+ormtion on t$e geogrp$ic( positiono+ t$e mobi(e device.

It $s become more nd more importnt #it$ t$e expnsion o+t$e smrtp$one nd tb(et mr-ets s #e((.

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INTRODUCTION CONTD.

Several categories of methods can be used to find

the location of the subscriber.

$e simp(e nd stndrd so(ution is /PS0bsed

LS.

GS allows finding one location if one knows its distance from other!already known locations.

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OBJECTIVE

" location based service that currently has hundreds of millions of users.

#evelops a software that is able to discover

their e$act positions! by only using information

publicly disclosed by the service.

Shows how this software effects the

privacy of friend finder service users.

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EXISTING SYSTEM

%riend finders

opular services that allow their users to discover people that

are in the vicinity through their mobile devices

osition &nformation E$pli%i& p'si&i'n: give precise information on users location

I(pli%i& p'si&i'n! give only approximate information

(e.g.! a set of users nearer than a given threshold)

'penness

Cl'sed )*ddies: users can see information of friends only

Open )*ddies: users can see everybodys information

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Position Information

implicit

position

explicit

position

Opennesso

pen

b

uddies

closed

bud

dies

OneDate

Meetic

adoo

!"O#$

P%ube

&indMy&riend

'atitude

EXISTING SYSTEM CONTD.

*IE IE* SE*I'E

'L6SSII'6IO

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implicit position explicit position

Position Information

Openness

open

buddies

close

d

buddies

OneDate

Meetic

adoo

!"O#$

P%ube

&indMy&riend

'atitude

EXISTING SYSTEM CONTD.

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o These service provide a fase se!se of sec"ri#$

o I# is possi%e #o co&p"#e "sers posi#io!

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'RO'OSED SYSTEM

"nalying eal-*orld %riend-%inder Services

*e analyed a real-world dating service with more

than +, users (open buddies! implicit position) and

found that it is possible for an attacker to infer the

position of its users.

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'RO'OSED SYSTEM CONTD.

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($$(%" D)!%*IP$IO+

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'RO'OSED SYSTEM CONTD.

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'RO'OSED SYSTEM CONTD.

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'RO'OSED SYSTEM CONTD.

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Data &lo, Diagram 'evel -

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'RO'OSED SYSTEM CONTD.

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Data &lo, Diagram 'evel 1

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'RO'OSED SYSTEM CONTD.

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#se %ase Diagram

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SCREEN S(OTS

'urrent Loction

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SCREEN S(OTS

Service providing nerby user (ist

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SCREEN S(OTS

Processing

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SCREEN S(OTS

rget Loction

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LITERATURE UR!E"

" Location rivacy "ware %riend Locator Laurynas Sik snys! 7eppe . 0homsen! Simonas Saltenis! an Lung 8iu!

and 've "ndersen

rivate and %le$ible ro$imity #etection in obile Social5etworks

0homsen! 7. 9altenis! S an Lung 8iu

0rilateration.ttp://en0,iipedia0org/,ii/$rilateration

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SYSTEM RE)UIREMENTS

S'%0*"6 6:;&6650S

'perating system 4 *indows , S#3 4 ?S 6$press %or *indows

hone

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@"#*"6 6:;&6650S

Device :2indo,s p.one 3 ,it.4P!

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CONC*USION

"nalying real-world friend-finder services

& t effects the privacy of friend finder service users

%ound attack to find the precise position of its users

#sers participating in a open5buddy friend finder expose t.eir locations

to t.e public6 even if t.is information is not explicitly given to ot.er users

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RE+ERENCES

'on+erence ec$nic( 6rtic(es

718 ttori9 6ristide9 6(essndro *ein9 6ndre /erino9nd Sergio :scetti. ;On t$e Privcy o+ *e(0::?9 2@13 IEEE 14t$ Int. Aune 2@13.

728L. Si-snys9 A. *. $omsen9 S. S(tenis9 :. L. Biu9 ndO. 6ndersen9 =6 (oction privcy #re +riend(octor9C in Proc. o+ t$e 11t$ Int. Symposium onSpti( nd empor( tbses9 ser. L'S. Springer92@@D.

738 6. Orng$i nd :. ((eri9 =:n in t$e midd(ettc-s9C in (c-$t 'on+erence Europe9 2@@3.

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