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CONTENTS
Introduction
Need for cell phone protection
Existing security measuresBiometric authentiction
Voice recognition
Cell phone architectureHeart of cell phone
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INTRODUCTION
Our paper proposes a new innovative,reliable, fool proof security measure forcell phones using VOICE
RECOGNITION
The voice of the user is processed(Speech Processing) using a digitalsignal processor which is the primepart of a cell phone
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NEED FOR PROTECTION
The threat for cell phones is alsoincreasing. Stealing a cell phone andselling them in black market has grown
into a profiting business.
There arises a need to adopt a foolproof security system to prevent theseunlawful activities, unauthorized usageand safeguard the user.
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EXISTING SECURITYMEASURES
> PASSWORD
A password should never be writtendown, never be given to another
person, and should be changed at leastevery three months.
Besides these, a sedative techniciancan break these passwords and PINnumbers
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VOICE RECOGNITION
Voice recognition is the identificationor verification of an individual identityusing speech as the identifying
characteristic.
To identify its auditory and vocalcharacteristics. An individual speech
spectrum is of the form as shown here.
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SPEECH AMPLITUDE SPECTRUM
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VOICEI/PSPEECH
DIGITIZATION
1011011 VOICE
CHARACTERISTICS
ANALYSIS
VOICE
CHARACTERISTICS
DATABASE
MATCH
PROCESS
MATCH
PROCESS NO
MATCH
YES
NOSEARCH /MATCHING
RESULTS
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CELL PHONE ARCHITECTURE
Kernel which is nothing but a microprocessor.
Vocoder is a DSP (digital signal processor).
Memory (SRAM, Flash RAM,ROM,&EEPROM)RF interface for transmitting and receiving of data.
Base band interface.
System clock (an oscillator producing frequency)SIM card interface.
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I/P SPECTRUM
VOCODER(DSP)
1011010 MOMORY(Flash memory)
CODING AND STORING OF SPEECH SPECTRUM
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FREQUENCY
TIME
GOOD MORNING AUDIO SPECTRUM
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AUTHORISED USER
UNAUTHORISED USER
TRANSMISSION
NO
TRANSMISSION
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Biometric trait Feature sensor Costs Comfort Accuracy
VOICE
IRIS
Ear form
HAND
GEOMETRY
Tone ortimbre Micro-phone Very low Very Easy High
Iris pattern camera Very high VeryDifficult
Very high
Dimension ofVisible ear
camera High Difficult High
High Highcamera EasyMeasurement
Of fingers
& palm
KEY board
strokes
Rhythm of
Keyboard
strokes
Key-board Very low Very lowEasy
COMPARATIVE ANALYSIS
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MERITS OF OUR PROPOSED SYSTEM
No external hardware.
No increase in cost of cell phone.
No difficulty for user (as he talks as usual).
Programming is easy.
Burglar proof.
Protection from unauthorized usage.
Can be used for all models of cell phones