Sniffer is a proposed solution to help locate lost mobile phones. It works by using a small base station with a unidirectional antenna to detect the unique IMEI number of lost phones as they are powered on. The IMEI number is stored in a database along with other identifying information. When a lost phone is powered on, the sniffer detects its IMEI and matches it to the database to help locate the missing device. The sniffer system aims to provide a solution to the growing problem of lost and unrecovered mobile phones.

1. Sniffer For Detecting Lost Mobile
By
Arvind Negi

2. What Happens when you
lost your Mobile Phone?

3. Reporting…Searching… Praying…

4. But still not found?

5. What is the best Solution
then?

6. What is the best Solution then?
Sniffer

7. Abstract
• Feature: help to create database using RAM
• IMEA - embedded in a chip
• RAM stores - IMEI no.
• Act as a database

8. What is Sniffer?The cell phone though the mobile communication system
is proved to be an advantageous method of communication
over wired communication, there is another problem that is
the mobile phones get lost or get misplaced. The losses are
increasing day by day and there has been very little effort that
has been done to obtain the lost mobile phone.

9. Introduction
• Feature: help to create database using RAM
• IMEA - embedded in a chip
• RAM stores - IMEI no.
• Act as a database

10. A sniffer is a program or a device that eavesdrops on the network traffic by grabbing
information traffic over a network. A cell phone really like a radio an extremely
sophisticated radio, which uses some band of frequency that has the basic working
similar to the ordinary cordless phone.
One of the most interesting things about cell phone is that it is really a
radio an extremely sophisticated radio, which uses some band of frequency that has
the basic working similar to the ordinary cordless phone. The mobile cellular
communication has been appreciated since its birth in the early 70’s and the
advancement in the field of VLSI has helped in designing less power, smaller size but
efficient transceiver for the purpose of communication. But however the technology
has not yet answered the loss or misplacement of the lost mobile phone which is
significantly increasing. In this paper we discuss the problem and the probable solution
that could be done. The IMEI number is a unique number that is embedded in the
mobile phone the main purpose of which is the blocking of calls that is made by
unauthorized person once the mobile is reported as stolen but here we use it
effectively for the purpose of detection.

11. Literature Survey
• 42% of lost mobiles have no security in place to protect data
• 20% of lost devices had access to work email
• 20% contained sensitive personal information such as national insurance
numbers, addresses and dates of birth
• 35% had access to social networking accounts via apps or web browser-
stored cookies

12. What is Sniffer?period 2004-2011, by focusing on high-level attacks, such those to user
applications. We group existing approaches aimed at protecting mobile
devices against these classes of attacks into different categories, based
upon the detection principles, architectures, collected data and
operating systems, especially focusing on IDS-based models and tools.
With this categorization we aim to provide an easy and concise view of
the underlying model adopted by each approach.

13. Proposed Methods
SNIFFER
• A program and/or device that monitors data traveling over a network
• It is a wire-tap device
• Sniffing refers to capture the data and information over the network traffic
• With the help of “sniffing” program a programmer can listen in on computer
conversations
• A sniffer can catch all packet traffic on network block

14. What Sniffer actually has?
Small Base Station
Plays major role
Transceiver section
operated at frequency (different)
Directional antenna
Includes:

15. Experimentation
EMEI(International Mobile Equipment Identity)
• Unique number
• Used for blocking of call made by unauthorized person
• 15 digit unique code
• identify-GSM/DCS/PCM
• check EIR (Equipment Identity Register)
• The function of an IMEI code is to identify the phone

16. What is IMEI?
I n t e r n a t i o n a l M o b i l e E q u i p m e n t I d e n t i f i e r
If EIR & IMEI matched
NETWORKS CAN DO NO. OF THINGS
TO KNOW IMEI NUMBER DIAL *#06#
BUT, We use IMEI EFFECTIVELY in SNIFFER
For the purpose of DETECTON

17. Gray List
Allow the Phone to be used, but can be
tracked to see who has it.
Black List
Listing the phone from being used on any
number where there is an EMI match

18. Designing for the Sniffer
1.SNIFFER BASE STATION
2.UNIDIRECTIONAL ANTENNA
3.TRACKING S/W

19. Design Of Unidirectional Antenna
Designing for the Sniffer - Design Of Unidirectional Antenna
• Act as a eyes for the sniffer
• Antenna is a device works at specified frequency
• Transmitting & receiving data signal
• Transmit power
• Used to show radiation pattern
(Unidirectional Antenna Radio
Pattern)

20. Sniffer Base Station
Designing for the Sniffer - Sniffer Base Station
• Small base station
• Include transceiver section
• Operated at frequency (900mhz which is VHF
range)
• OSCILLATOR circuit-for frequency range
• Important is cooling
• Low power transmitter (help in nature)

21. S/W for the Tracking
Designing for the Sniffer - S/W for the Tracking
• Feature: help to create database using
RAM
• IMEA - embedded in a chip
• RAM stores - IMEI no.
• Act as a database

22. S/W for the Tracking
Designing for the Sniffer - S/W for the Tracking
RAM
IMEI Number
Lost mobile
Signaling information
i/p

23. Working of a Sniffer Device
• Sniffer works as a transceiver
• BTS (Base Transceiver Station) - Act as a middle
man
• MTSO (Mobile Telephone Switching office) =
MSC(Mobile Switching Centre)

24. Before Sniffer Increase The Frequency

25. After Sniffer Increase The Frequency
IMEI no. provided by MTSO or MSC
BTS(base transceiver station)-act as a middle man
MTSO(mobile telephone switching office)=MSC(mobile
switching centre)

26. Sniffer tries to Communicate with the
Lost Mobile

27. Key Finding
• SNIFFER (The small transceiver used for detecting lost mobile phone)
• IMEA (International Mobile Equipment Identifier)
• MTSO (Mobile Telephone Switching Office)
• MSC (Mobile Station Switching Controller)
• BTS (Base transceiver station)

28. Conclusion
Designing for the Sniffer - S/W for the Tracking
• Feature: help to create database using RAM
• IMEA - embedded in a chip
• RAM stores - IMEI no.
• Act as a database

29. Reference
Designing for the Sniffer - S/W for the Tracking
• http://www.google.com
• http://www.seminarsonly.com
• John D Kraus, “Electromagnetics”, TMH,
• Schiller , “Mobile Communication”, Pearson Education 1 Edition, 7th
reprint-2003
• Jordan et al, “Electromagnetic waves

30. Thank You