Codec Content.docx

Abstract:

The project entitled “MOBILE APPLICATION FOR CODEC” is a mobile application being developed for all users. This application is an open source. This mobile application is provided to send a Short Message Service (SMS) to their friends, neighbors, relatives and so on. This application will be vary from other SMS applications. This application is based on the cryptography methodology. If the user needs to send a message to their friend the user should type the message in text area. It will convert as encrypted format. When the other user got the message he/she should open the message it will be decrypted and it will asks password to decrypt the message. So the user should give a password after that it will be decrypted and shows the original text. It doesn’t have any security messaging system earlier. So I am going to do a mobile application as I mentioned above.

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PROJECT PROPOSAL

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2. Project proposal Executive Summary The project entitled “MOBILE APPLICATION FOR CODEC” is being developed for all users. This mobile application is provided to send a Short Message Service (SMS) to their friends, neighbors, relatives and so on. This application will be vary from other Messaging Service applications. If the user needs to send a message to their friend the user should type the message in text area. It will convert as encrypted format. When the other user got the message he/she should open the message it will be decrypted and it will asks password to decrypt the message. So the user should give a password after that it will be decrypted and shows the original message.

INTRODUCTION About Yourself Sacred Heart College (Autonomous) is an afflicted First Grade College of Thiruvalluvar University. It is a minority institution, established and administrated by the Salesian of DonBosco (SDB) and offering various courses for UG and PG students. This is Shamili Iqbal working on this project, doing 2nd year of M.Sc Software Technology in Sacred Heart College, Tirupattur. About the Term project As an academic requirement this project is done for graduate students as a final year project. This project is mainly done for the all users those who are using mobile phones. The project entitles “MOBILE APPLICATION FOR CODEC” is open source application which can be used by any graduate for their communication.

Problem Statement: The “MOBILE APPLICATION FOR CODEC” faces some problem on sending messages to others. If the user sends a SMS to anyone it can read by all. So there is no defense to send the message to others. The secret messages will passed out. So the users feel uncomfortable and not secured to send their message.

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Proposed Solution I develop an official mobile application for the above problem. The solution for this problem is to create a new mobile application on “MOBILE APPLICATION FOR CODEC”. It will provide a more protection to the messaging system. It will encrypt the message and the other user should enter the password and it will decrypt the message automatically if the password is correct.

TECHNOLOGY REQUIREMENTS Hardware: Processor

: Intel Pentium

RAM

: 512 MB

Storage

: 20 GB

Input

: Keyboard, Mouse

Output

: Monitor

Software: Front Tier

: Eclipse (Android)

Data Tier

: SQlite

Software Tools

: MS Visio

TERMS AND CONDITIONS 1. Project Duration: The duration of the academic project is three months from the date of agreement. 2. Project Initiation: Student upon receiving approval from the Project Guide shall start the requirement study and analysis and complete it as per the project schedule agreed upon by the Department. 3. Development: 100% of Project development will be done in the college lab.

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VISION DOCUMENT

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3. VISION DOCUMENT Purpose: The main purpose of this document is to define requirements of “MOBILE APPLICATION FOR CODEC”. The supplementary specification lists the requirements that are not readily specification and case model together to capture a complete set requirement of all information.

Scope: Use case and other supplementary documents can be prepared by having this vision document.

Positioning: The problem of

Unprotected Short Message Services cause some issues.

Affects

Those who are willing to share their Short Message Services.

The impact of which is

Difficult to manage the handling messaging services safely.

A successful solution would be

Creating a mobile application for the “CODEC”.

Product Statement: For

All mobile users.

Who

Public.

The (Project name)

MOBILE APPLICATION FOR CODEC

That

Will help to the mobile users to send the secured messages.

Unlike

The existing system is not providing protection for SMS.

Our product

Make the more security to the SMS.

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SYSTEM REQUIREMENTS

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4.1 SYSTEM STUDY Introduction This system study enables us to identify the purpose of input that has to be given, the Entry criteria and Exit criteria.

System Overview The project is called “MOBILE APPLICATION FOR CODEC”. This application contains the following information, the events which are held by the Messaging Services.

List of module 1. Text

Description of Modules: The System is mainly created to share the information to their friends by using this CODEC mobile application. The public can type their messages in text area. It will encrypt the message automatically and it will asks the password when the user open the message. After entering the correct password it will decrypt and open the message automatically. This system is created by using ECLIPSE.

Module 1: Text Purpose The main purpose of the “TEXT” module is used to do the messaging system. Users can send and receive the messages to each other. It will encode and decode the message automatically, if the password is correct.

Entry Criteria If the users need to send their messages with secure format they should click on CODEC application.

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Input Public users should download the application and open it. And they should type secured message on text area.

Output The encrypted message will be decrypt automatically is the password is correct.

Exit Criteria The user can click on exit button or back button.

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4.2 Use case Specification

4.3 Use case Diagram Message:

Sending Message

Send

User 1

Receive Message

Receive

User 2

1. Description: This page is used to send the message to other users.

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2. Flow of events: 2.1Basic Flow 

The application displays the text page.



They should enter the text message in text area.



It will encrypt the message automatically.



Then the user should send the message.



Receiver can open the message now.



It will ask password to the receiver.



Receiver should enter the password which was stored in database.



Click OK button. If the password is correct it will show the message else it displays error message to the receiver.

2.2. Alternative flow: Receiver should create a new password.

3. Preconditions: If the admin wants to send a message admin should click on the message icon.

4. Post conditions: If the admin created a new password they can proceed to send and receive the messages from the neighbors.

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ANALYSIS AND DESIGN

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5.1 Architecture Diagram

Presentation Layer

Business Logic

Activities

Text

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5.2 Activity Diagram

Home

CODEC

Encryption

Enter Mobile no and Message

Decryption

Encrypted Message

Password

Process

Original Message

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5.3 Sequence Diagram

Sender

Receiver

Ringer

Encrypt text Ringer attention text Device Ringing GPS Attention Word Location Details Decrypt text

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Locator

5.4 Class Diagram

CODEC

<<Java Class>> My Receiver SMS:smsManager

<>

Text:String

My Receiver() On Receive: void()

<<Java Class>> Ring Activity Context:context On create (Bundle) : Void()

<<Java Class>> Sender SMS:smsManager Sender() Onsend:Void()

Decrypt()

On Create Activities Activity 1 Activity 2 . . Activity n

Cryptography

Text: String

Send()

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5.5 Database Design Table Name createpassword

Description This table is used to create a new password for CODEC application. S.No

Field Name

Data Type

Constraints

Description

1

newpassword

Varchar2(20)

Not Null

User enters the new password

2

reenternewpassword

Varchar2(20)

Not Null

User enters password

the

Table Name updatepassword

Description This table is used to update a password if the users want. S.No

Field Name

Data Type

Constraints

Description

1

Oldpassword

varchar(20)

Not Null

User enters the old password

2

Newpassword

varchar(20)

Not Null

User enters password

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the

5.6 Entity Relationship Diagram

Phone no name

Text

Encrypt text

Users

Send message

Password Message Decrypt

Receive message

Receiver

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5.7 Data Flow Diagram

Level 0:

Sender

CODEC

Level 1:

Sender

Original message

Encrypt the message

Level 2:

Receiver

Decrypt the message

Password

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Level 3:

Receiver

Original Message

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TEST CASE DESIGN

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Test Case - 1 Module: Text Revision History Sl. Version No No 1. C1.1

Date 16-3-18

Project Name: MOBILE APPLICATION FOR CODEC Functionality: Pre Condition:

Modification details

Module: Text

Adding

Load the Text module from the CODEC application.

If all the fields are entered correctly then click on Encrypt button. Scenario: Description: Check whether “Text” is working or not. # Procedure Test Test Data Expected Result Condition 1 1.Open the Text module Check whether To 9442391338 Record should get from application Text field saved to the data accepts Text base 2.Click on mobile Values number Message Hello Friend Encrypted 3.Click on "Encrypt" message Jaud6@#%klm Enter Password 1992 4.Encrypted message Your 5.Click on Decrypt Message 6.Enter Password is Hello Friend

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Status

Test Case - 2 Module: Text Revision History Sl. Version No No 1. C1.1

Date 16-3-18

Project Name: MOBILE APPLICATION FOR CODEC Functionality: Pre Condition:

Modification details

Module: Text

Adding

Load the Text module from the CODEC application.

If all the fields are entered correctly then click on Encrypt button. Scenario: Description: Check whether “Text” is working or not. # Procedure Test Test Data Expected Result Condition 1 1.Open the Text module Check whether To 9442391338 Record should get from application Text field saved to the data accepts Text base 2.Click on mobile Have a nice Values number Message day Encrypted 3.Click on "Encrypt" message Iuye r iuhf kjf Enter new Password Vasudevan Confirm new password Vasudevan Password created Successfully Enter password Vasudevan 4.Encrypted message Your 5.Click on Decrypt Message Have a nice 6.Enter Password is day

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Status

USER INTERFACE DESIGN

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Send Message:

Encrypted Text:

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Enter Password:

Enter new password:

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Update Password:

Received Message:

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IMPLEMENTATION

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8.1 Sample code Message: <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/editText2" android:layout_centerHorizontal="true" android:layout_marginTop="49dp" android:text="Encrypt" /> <EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignTop="@+id/textView1" android:layout_marginLeft="17dp" android:layout_toRightOf="@+id/textView1" android:ems="10" />

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<EditText android:id="@+id/editText2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/editText1" android:layout_marginTop="31dp" android:layout_toRightOf="@+id/textView2" android:ems="10" android:inputType="textEmailAddress" > <requestFocus /> Enter Password: 30

<EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/textView1" android:layout_centerHorizontal="true" android:layout_marginTop="30dp" android:ems="10" /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignRight="@+id/textView1" android:layout_below="@+id/editText1" android:layout_marginTop="42dp" android:text="OK" /> Encrypted text:

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<EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/textView1" android:layout_centerHorizontal="true" android:layout_marginTop="62dp" android:ems="10" android:inputType="textMultiLine" > <requestFocus /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/editText1" android:layout_centerHorizontal="true" android:layout_marginTop="30dp" android:text="Decrypt" /> Create Password:
android:text="Enter your new password" android:textAppearance="?android:attr/textAppearanceMedium" /> <EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView1" android:layout_below="@+id/textView1" android:layout_marginTop="47dp" android:ems="10" /> <EditText android:id="@+id/editText2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView2" android:layout_below="@+id/textView2" android:layout_marginTop="24dp" android:ems="10" > <requestFocus /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/editText2" android:layout_below="@+id/editText2" android:layout_marginLeft="60dp" android:layout_marginTop="30dp" android:text="Create" />

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Update Password: <EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView1" android:layout_below="@+id/textView1" android:layout_marginTop="30dp" android:ems="10" > <requestFocus /> 34

<EditText android:id="@+id/editText2" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView2" android:layout_below="@+id/textView2" android:layout_marginTop="20dp" android:ems="10" /> <EditText android:id="@+id/editText3" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/textView3" android:layout_below="@+id/textView3" android:layout_marginTop="33dp" android:ems="10" /> <Button android:id="@+id/button1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_alignLeft="@+id/editText1" android:layout_alignParentBottom="true" android:layout_marginBottom="16dp" android:layout_marginLeft="46dp" android:text="Update" />

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Receive: <EditText android:id="@+id/editText1" android:layout_width="wrap_content" android:layout_height="wrap_content" android:layout_below="@+id/textView1" android:layout_centerHorizontal="true" android:layout_marginTop="68dp" android:ems="10" android:inputType="textMultiLine" />

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CONCLUSION

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9. Conclusion The project “MOBILE APPLCATION FOR CODEC” is completed, satisfying the required design specifications. The mobile application provides a user-friendly interface. All modules in the mobile application have been tested with valid data and invalid data and everything work successfully. Thus the mobile application has fulfilled all the objectives identified and is able to replace with other features. The constraints are met and overcome successfully. The application is designed as like it was decided in the design phase. This application has a user-friendly screen that enables the user to use without any inconvenience. This would help the corporation prepare and organize its schedules more efficiently on the basis of traffic demand. Besides, it would provide data on concessions given to various sections. The application has been tested with live data and has provided a successful result. Hence the mobile application has proved to work efficiently.

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FUTURE ENHANCEMENT

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10. Future Enhancement Future enhancement of “MOBILE APPLICATION FOR CODEC” is to develop this messaging system as a mobile application. The users may use this application in offline. This application will enhance with more features. This application has only encrypted text message. In future it will include voice message, audio calls and video calls with encryption and decryption method using this CODEC mobile application.

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BIBLIOGRAPHY

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11. Bibliography

1. https://www.developer.com/ws/android/encrypting-with-android-cryptography-api.html 2. https://github.com/facebook/conceal/issues/49 3. https://www.google.co.in/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&ved=0ahUKEwjSnr_4 6uDYAhVIbVAKHQDkC8oQFggoMAE&url=https%3A%2F%2Fwww.androidtutorialpoint.com%2Fb asics%2Fsend-sms-programmatically-android tutorial%2F&usg=AOvVaw1Q38oQldJwEC3v55IAZyd5 4. http://www.tutorialsface.com/2015/08/building-your-own-android-chat-messenger-appsimilar-to-whatsapp-using-xmpp-smack-4-1-api-from-scratch-part-2/ 5. https://www.appsrox.com/android/tutorials/instachat/ 6. https://stackoverflow.com/questions/40123319/easy-way-to-encrypt-decrypt-string-in-android 7. https://gist.github.com/FrankWu100/6737797 8. http://www.androprogrammer.com/2016/04/data-encryption-and-decryption-in.html 9. http://www.codejava.net/coding/file-encryption-and-decryption-simple-example 10. https://www.ibm.com/developerworks/websphere/tutorials/i-mqrad1/i-mqrad1.html

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