Privacy preserving relative location based services for mobile users

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Copyright © 2015 LeMeniz Infotech. All rights reserved
Page number 1
LeMeniz Infotech
36, 100 Feet Road, Natesan Nagar, Near Indira Gandhi Statue,
Pondicherry-605 005.
Call: 0413-4205444, +91 9566355386, 99625 88976.
Web : www.lemenizinfotech.com / www.ieeemaster.com
Mail : projects@lemenizinfotech.com
Privacy-Preserving Relative Location Based Services
for Mobile Users
Abstract:
Location-aware applications have been used widely with the
assistance of the latest positioning features in Smart Phone such
as GPS, AGPS, etc. However, all the existing applications
gather users’ geographical data and transfer them into the
pertinent information to give meaning and value. For this kind
of solutions, the user’s privacy and security issues might be
raised because the geographical location has to be exposed to the
service provider. A novel and practical solution is proposed in
this article to provide the relative location of two mobile users
based on their WiFi scanned results without any additional
sensors. There is no privacy concern in this solution because end
users will not collect and send any sensitive information to the
server. This solution adopts a Client/Server (C/S) architecture,
where the mobile user as a client reports the ambient WiFi APs
and the server calculates the distances based on the WiFi AP’s
topological relationships. A series of technologies are explored
to improve the accuracy of the estimated distance and the
corresponding algorithms are proposed. We also prove the
feasibility with the prototype of “Circle Your Friends” System

Page number 2
LeMeniz Infotech
Call: 0413-4205444, +91 9566355386, 99625 88976.
(CYFS) on Android phone which lets the mobile user know the
distance between him and his social network friends.
Introduction:
Location-aware applications deliver specified messages to users
based on their physical location. This kind of services can be
divided into two types: absolute-location services and relative-
location services . Absolute location is locating a place using a
coordinate system while relative location means to locate a place
relative to other landmarks.
Existing system:
In Existing System Location services require the users to report
their absolute location data to the server and then the server
return the querying result. Usually the technologies to detect and
retrieve the location data include GPS, mobile cell id (CID),
WiFi AP. For these methodologies, serious privacy concerns are
raised because they enable the continuous tracking of involved
users’ location .

Page number 3
LeMeniz Infotech
Call: 0413-4205444, +91 9566355386, 99625 88976.
Disadvantages:
The potential information leakage in communications and the
inappropriate usage of this information by the service providers.
Proposed System :
In Proposed System we implemented a new solution to provide
the relative location service without the assistance of additional
sensors or GPS devices. Since there is no server to store any
users’ absolute location, the privacy of each user has been
persevered to the utmost extent. We also make use of some
parameters such as IEEE 802.11 protocols, signal strength and
overlap ratio to enhance the precision of the distance. For the
same reason, the adjustment coefficient are discussed and
integrated into our approach. To prove its feasibility, a prototype
based on Facebook is developed on Android based mobile
devices. By evaluating the accuracy of estimated distance,
though the precision is not good as GPS,
Advantages:

Page number 4
LeMeniz Infotech
Call: 0413-4205444, +91 9566355386, 99625 88976.
 It has proved that our privacy-free solution is suitable for
social networking and location-based application.
Hardware Requirement:
 System : Pentium IV 2.4 GHz.
 Hard Disk : 40 GB.
 Floppy Drive : 44 Mb.
 Monitor : 15 VGA Colour.
 Mouse : Logitech
 Ram : 512 Mb.
 MOBILE : ANDROID
Software Requirement:
 Operating system : Windows 7.
 Coding Language : Java 1.7
 Tool Kit : Android 2.3 ABOVE
 IDE : Eclipse

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