1. Sniffer
for detecting lost mobile
By Asmita Tarar
Amravati

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. What is Sniffer?• Precise
• Small Size
• Mobile Base Station
• Unidirectional Antenna
• Tracking S/W

8. What Sniffer actually has?

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

10. What is IMEI?
(International Mobile Equipment Identifier)

11. 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
• Unique number
• Used for blocking of call made by unauthorized person
• 15 digit unique code
• identify-GSM/DCS/PCM
• check EIR

12. 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

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

14. Designing for the Sniffer1.SNIFFER BASE STATION
2.UNIDIRECTIONAL ANTENNA
3.TRACKING S/W

15. 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)

16. 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)

17. 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

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

19. 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)

20. Before Sniffer Increase The Frequency

21. 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)

22. Sniffer tries to Communicate with the Lost Mobile

23. Is browser sniffing the only viable
approach for mobile device detection?

24. ADVANTAGES• Useful for lost mobile
• effective cost
• low power consumption
• easy to design

25. ConclusionCertain boundaries :
• Power of mobile should be good enough
• mobile should not been in shadow regain
Note: “Method can been improved by using modern technology and devices”

26. Thank You