The document outlines the design and implementation of an improved authentication system for Android smartphones to enhance security and prevent data leakage in case of loss or theft. The proposed system includes a lock screen that supports user-friendly authentication, lost phone detection via SMS, and the ability to erase data remotely. Future enhancements could integrate a web application for backup and tracking, ultimately aiming to protect personal information more effectively.

1. Design and Implementation of
Improved Authentication
System for Android
Smartphone Users
TEC Oyoor

2. Introduction
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The devices most often used for IT services
are changing from PCs & laptops to
smartphones and tablets bcoz of portability.
Devices contain increasing amount of personal
info need better security.
If we lost our phone, we want to prevent the
info leakage and can locate easy as possible.
Thus we preset an upgraded Lock Screen
System which encapsulate the lost phone
detection procedure.

3. Overview
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In this project we present our upgraded Lock
System, which is able to support
 Authentication for the user’s convenience
 Provide a good security system
 Suggest an upgraded authentication system
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Lost phone detection system
 If we lost our phone in silent mode,we can send a
present sms to our phone
 Phone will send back the exact geo location
 Phone will get locked, can erase data

4. Existing System
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Pattern Lock
Finger Scan
Keypad Lock
Glass Lock
Slide Lock
if our phone gets stolen, inform the authorities
and hope they get it back by tracking the IMEI
number.

5. Disadvantages of Existing System
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It does not serve as a security system and
necessitates extra security applications.
 Repetitive input touching is an inconvenience
factor.
 security threat of the smartphone by loss or
stolen may cause the users’ private data
disclosure such as contacts, SMS message,
photos, smart car keys, credit cards, login Ids,
and so on.

6. Proposed System
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This Lock Screen is shown in figure .
Redundancy input (re – touching the circle) is
allowed and when the circle is touched more
than once , it changes color (maximum of 7
times) so that the user can identify the correct
input.
 If we lost our phone in silent mode, we need to
do is send a particular SMS to our phone from
any other phone and your phone will send back
the exact geo location .

7. 
The GPS of the phone gets turned on, so it
easy to locate the phone.
 if the robber puts a new SIM card the app
detects the change and sends an SMS from the
new SIM to a previously set mobile number.
 Also you can erase your phone memory or SD
card with a preformatted SMS so that no one
can access your secure data. During all these
activities your stolen phone will be in lock
mode.

8. Proposed System

9. Advantages of Proposed System
The Screen receives the “On/Off Broadcast
Receiver” so it is processed with Intent from
Screen-On, activating the Lock Screen Activity.
 can erase your phone memory or SD card with
a preformatted SMS so that no one can access
your secured data.
 If your phone is stolen the same preset text can
be used to lock the phone,so lost phone
detection process will not be a time consuming
process.
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10. Hardware Requirements
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CPU type
: Intel Pentium 4
Clock speed
: 3.0 GHz
Ram size
: 512 MB
Hard disk capacity : 40 GB
Monitor type
: color monitor
Keyboard type
: Internet Keyboard

11. Software Requirements
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Operating System
 Language
 Back End
 Documentation
:
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:
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Android
ANDROID SDK 2.3
SQLite
Ms - Office

12. Future Enhancement
we can build a web application along with android
application so that when your phone is stolen it can
back up all your contacts and personal data to the
web application before erasing all your secure data
from the memory. Also you can track your mobile
location with the help of a Google map view in the
web.

13. Conclusion
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In this thesis, we analyzed the problems in
current HomeLaunchers’ Lock Screens and
suggested improving the authentication systems
for Android smartphones.
 The use of our improved authentication system
& the lost phone detection ensures protection of
personal info.