secured secret message passing through video file

8/6/2019 Secured secret message passing through video file

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Secured secret message passing through video file

Chapter 1

INTRODUCTION

Internet communication has become an integral part of the Infrastructure of

todays world. The information communicated comes in numerous forms

and is used in many applications. In a large number of these applications, it

is desired that the communication be done in secrete. Such secret

communication ranges from the obvious cases of bank transfers, corporate

communications, and credit card purchases, on down to a large percentage

of everyday email. With email, many people wrongly assume that their

communication is safe because it is just a small piece of an enormous

amount of data being sent worldwide. After all, who is going to see it? But

in reality, the Internet is not a secure medium, and there are programs out

there which just sit and watch messages go by for interesting information.

This project not only deals with a method of encrypting messages, but

hiding them something else to enable them to pass undetected. The

technique here used is Video Steganography.Video Steganogarphy is a

technique to hide any kind of files in any extension into a carrying Video

file. This project is the application developed to embed any kind of data

(File) in another file, which is called carrier file. The carrier file must be a

video file. It is concerned with embedding information in an innocuous

cover media in a secure and robust manner. This system makes the Files

more secure by using the concepts Steganography and Cryptography.

Steganography, poor cousin of Cryptography is the art of hiding messages

inside other messages such that the very existence of the message is unknown to

third party. The goal of cryptography is to make data unreadable by a third party;

the goal of Steganography is to hide the data from a third party through the use of

advanced computer software.

The cover data should not be significantly degraded by the embedded data,

and the embedded data should be as imperceptible as possible. The embedded datashould be as immune as possible to modifications from intelligent attacks or

GECH, Dept of CS&E 1


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anticipated manipulations. Thus it is necessary that the hidden message should be

encrypted before Steganography.

In the case of using this technique of hiding the data with a video file, thevisibility of the video, resolution or clarity is not being affected. The hidden data

can be of length in size. To the Hacker, only the video is make going to be visible

when previewed and not a trace of the hidden data.

If the video file is opened across a text editor, then also the data is not going

to be visible as the information is stored in an encryption form, which is also

binary. Hence making it difficult for the enclosure to differentiate the data to the

video file.

1.1 PROBLEM STATEMENT

The first step in designing a system was to identify the underlying cause behind

the problems in the existing system. For this purpose, the information was

gathered and checked for the completeness and accuracy of the data. Analyzing

the information involved, identification of components of the system and their

interrelationship is made. Information is collected from the existing machine. The

problem is thoroughly analyzed and a test is done on the technical, social and

economic feasibility of developing the proposed system. The data needed to

develop the system was collected from all these documents and discussing with

the authorities for changes needed to the proposed system. The requirements are

drawn on the basis of the needs of the users through an expert and the developers

experience on the system.

1.2 OBJECTIVE OF THE PROJECTThe objective of steganography is to hide a secret message within a cover-media

in such a way that others cannot discern the presence of the hidden message.

Technically in simple words steganography means hiding one piece of data

within another.

Modern steganography uses the opportunity of hiding information into

digital multimedia files and also at the network packet level.

Hiding information into a media requires following elements



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The cover media that will hold the hidden data

The secret message , may be plain text, cipher text or any type of data

The stego functionand its inverse

An optional stego-key or password may be used to hide and unhide the

message.

1.3 ORGANIZATION OF THE REPORT

This report has been organized into eight chapters. In Chapter 1 we have

Introduction consisting of Problem statement, and Objective of the Project

and Organization of the project. In Chapter 2 we provide Literature surveyconsisting of Existing System, Proposed System. Chapter 3 gives the

information about hardware and software requirements of the system.

Chapter 4 provides information about the input and output design, use case

diagram, activity diagram, system architecture, algorithms related to the

system. Chapter 5 and 6 gives the implementation and testing of the

modules and the corresponding algorithms.

In Chapter 7 we have the results of the tests conducted in the previous

chapter. In Chapter 8 we have the conclusion and future enhancement of our

system and then we conclude it with the references.



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Chapter 2

LITERATURE SURVEY

The proposed system should have the following features. The transactions should

take place in a secured format between various clients in the network. It provides

flexibility to the user to transfer the data through the network very easily. It should

also identify the user and provide the communication according to the prescribed

level of security with transfer of the file requested and run the required process at

the server if necessary. In this system the data will be sending through the network

as a video file. The user who received the file will do the operations like de

embedding, and decryption in their level of hierarchy etc.

Analysis is the process of studying to find the best solution to the problem.

System analysis is the process by which we learnt about the existing problems,

define objects and requirements and evaluates the solutions. System analysis givesthe target for design and development. System analysis is the way of thinking

about the organization and the problem it involves, a set of technologies that helps

in solving these problems.

2.1 EXISTING SYSTEM

Traditionally this was achieved with invisible ink, microfilm or taking the first

letter from each word of a message. This is now achieved by hiding the message

within a graphics or sound file. For instance in a 256-greyscale image, if the least

significant bit of each byte is replaced with a bit from the message then the result

will be indistinguishable to the human eye. An eavesdropper will not even realize

a message is being sent. This is not cryptography however, and although it would

fool a human, a computer would be able to detect this very quickly and reproduce

the original message.



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2.2 PROPOSED SYSTEM

In this work we propose a novel type of digital video encryption that has several

advantages over other currently available digital video encryption schemes.

We also present an extended classification of digital video encryption

algorithms in order to clarify these advantages. We analyze both security and

performance aspects of the proposed method, and show that the method is

efficient and secure from a cryptographic point of view. Even though the method

is currently feasible only for a certain class of video sequences and video codecs,

the method is promising and future investigations might reveal its broader

applicability. Finally, we extend our approach into a novel type of digital video

steganography where it is possible to disguise a given video with another video.



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Chapter 3

REQUIREMENTS SPECIFICATION

The Software Requirements Specifications is produced at the culmination of the

analysis task. The function and performance allocated to software as part of the

system engineering are refined by establishing a complete information description

as functional representation of system behaviour, an indication of performance

requirements and design constraints, appropriate validation criteria.

3.1 SOFTWARE REQUIREMENTS

1. Language: Java Networking

2. Front End Tool: Java J2SDK 1.5, Swing

3. Operating System: Windows XP

3.2 HARDWARE REQUIREMENTS

1. Processor : Pentium

2. Memory Size : 128 MB RAM

3. Hard Disk Drive : 20 GB hard Disk

4. Floppy Disk Drive : 1.44 MB- 3.5Floppy Disk

5. Display : EGA/VGA Color Monitor

600 x 800 Pixels Resolution

High Color (16 Bit)

6. Key Board : TVS Keyboard (104 Keys)

7. Mouse : Logitech scroll mouse.

8. 32 Bit PCI Ethernet Card.

9. LAN connection



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3.3 FUNCTIONAL AND NON FUNCTIONAL

REQUIREMENTS

3.3.1 USE CASES DESCRIPTION

Use case name Encrypt

Participating

actors

Sender

Flow of events The user-selected file will be encrypted with a given key.

Entry

Condition

User must select the file and must give the key for encryption.

Exit condition Successful or Un Successful Encryption of file.

Quality

Requirements

Display proper error messages while Encryption.

Use case name Decrypt

Participating

actors

Receiver

Flow of events The user-selected file will be decrypted with a proper key.

Entry

Condition

User must select the file and must give the key for decryption.

Exit condition Successful or Un Successful Decryption of file.

Quality

Requirements

Display proper error messages while Decryption.

Use case name Embed

Participating

actors

Sender

Flow of events The user-selected encrypted file will be embedding with

selected video file.

Entry Condition User must select the one encrypted file and one video file

for embedding.

Exit condition Successful or Un Successful Embedding process.

Quality

Requirements

Display proper error messages while Embedding two files.



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Use case name De-Embed

Participating

actors

Receiver

Flow of events The user-selected video file will be de-embedding to encrypted

file.

Entry

Condition

User must select the video file for de-embedding.

Exit condition Successful or Un Successful De-embedding of file.

Quality

Requirements

Display proper error messages while De-embedding.

Use case name Send FileParticipating

actors

Sender

Flow of events The user-selected file will be send to the given host.

Entry Condition User must select the file to send and must know the IP

address of the destination host.

Exit condition Successful or Un Successful sending of file to the

destination host.

Quality

Requirements

Display proper error messages while Sending the file.

Chapter 4

SYSTEM DESIGN

Design is a creative process, a good design is the key to effective system. The

system Design is defined as The process of applying various techniques andprinciples for the purpose of defining a process or a system in sufficient detail to



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permit its physical realization. Various design features are followed to develop

the system. The design specification describes the features of the system, the

components or elements of the system and their appearance to end-users.

In system design high-end decisions are taken regarding the basic systemarchitecture platforms and tools to be used. The system design transforms a

logical representation of what a given system is required to be in to the physical

specification. Design starts with the systems requirement specification and

converts it into a physical reality during the development. Important design factors

such as reliability, response time, throughput of the system; maintainability etc

should be taken into account.

4.1 INPUT DESIGN

The input Design is the process of converting the user-oriented inputs in to the

computer-based format. The goal of designing input data is to make the

automation as easy and free from errors as possible. Providing a good input design

for the application easy data input and selection features are adopted.

The input design requirements such as user friendliness, consistent format

and interactive dialogue for giving the right message and help for the user at right

time are also considered for the development of the project.

Input design is a part of overall system design which requires very careful

attention. Often the collection of input data is the most expensive part of the

system, which needs to be route through number of modules. It is the point where

the user ready to send the data to the destination machine along with known IP

address; if the IP address is unknown then it may prone to error. In input design

case there is no chance of corrupting the data has it is one way traffic.

4.2 OUTPUT DESIGN

A quality output is one, which meets the requirements of the end user and

presents the information clearly. In any system results of processing are

communicated to the users and to other systems through outputs. In the output

design it is determined how the information is to be stored in text file. It is most



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important and direct source information to the user. Efficient and intelligent

output improves the systems relationship with source and destination machine.

Outputs from computers are required primarily to get same packet that the

user has send instead of corrupted packet. They are also used to provide topermanent copy of these results for later consultation.

4.3 USE CASE DIAGRAM

4.3.1 SENDER

Sender

Send File

Embed

Encrypt

*

*

**

*

*

Fig 4.3.1: use case diagram (sender)

4.3.2 RECEIVER



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Receiver

De Embed

Decrypt

*

*

*

*

Fig 4.3.2: use case diagram(receiver)



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4.4 ACTIVITY DIAGRAM

4.4.1 ACTIVITY DIAGRAM FOR SENDER

Fig 4.4.1: activity diagram (sender)



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4.4.2 ACTIVITY DIAGRAM FOR RECEIVER

Fig 4.4.2: activity diagram (receiver)



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4.5 SYSTEM ARCHITECTURE

Sender Video Steganography Receiver Input Output

Context Level Diagram

Fig 4.5: System architecture

4.6 ALGORITHM

The Data Encryption Standard (DES) is a block cipherthat uses shared secret key

between sender and receiver. It was selected by theNational Bureau of Standards

as an official Federal Information Processing Standard (FIPS) for the United

States in 1976 and which has subsequently enjoyed widespread use

internationally. It is based on a symmetric-key algorithm that uses a 56-bit key.

DES encrypts and decrypts data in 64-bit blocks, using a key. It takes a 64-

bit block of plaintext as input and outputs a 64-bit block of cipher text. Since it

always operates on blocks of equal size and it uses both permutations and

substitutions in the algorithm.


SYSTEM ARCHITECTURE
http://en.wikipedia.org/wiki/Block_cipherhttp://en.wikipedia.org/wiki/Shared_secrethttp://en.wikipedia.org/wiki/National_Bureau_of_Standardshttp://en.wikipedia.org/wiki/Federal_Information_Processing_Standardhttp://en.wikipedia.org/wiki/United_Stateshttp://en.wikipedia.org/wiki/United_Stateshttp://en.wikipedia.org/wiki/United_Stateshttp://en.wikipedia.org/wiki/Symmetric-key_algorithmhttp://en.wikipedia.org/wiki/Shared_secrethttp://en.wikipedia.org/wiki/National_Bureau_of_Standardshttp://en.wikipedia.org/wiki/Federal_Information_Processing_Standardhttp://en.wikipedia.org/wiki/United_Stateshttp://en.wikipedia.org/wiki/United_Stateshttp://en.wikipedia.org/wiki/Symmetric-key_algorithmhttp://en.wikipedia.org/wiki/Block_cipher


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Figure: 4.6 DES Block Diagram

DES works on 64 bits of data at a time. Each 64 bits of data is iterated on from

1 to 16 times (16 is the DES standard). For each iteration a 48 bit subset of the 56

bit key is fed into the encryption block represented by the dashed rectangle above.

Decryption is the inverse of the encryption process. The "F" module shown in the

diagram is the heart of DES. It actually consists of several different transforms

and non-linear substitutions.

Block ciphers where the cipher text is calculated from the plain text by

repeated application of the same transformation or round function. In a Feistel

cipher, the text being encrypted is split into two halves. The round function, F, is

applied to one half using a sub key and the output of F is (exclusive-or-ed

(XORed)) with the other half. The two halves are then swapped. Each roundfollows the same pattern except for the last round where there is often no swap.

DES has 16 rounds, meaning the main algorithm is repeated 16 times to

produce the cipher text. It has been found that the number of rounds is

exponentially proportional to the amount of time required to find a key using a

brute-force attack. So as the number of rounds increases, the security of the

algorithm increases exponentially.



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Fig 4.6.1: Feistel structure of DES



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5. Apply Permuted to K to get the final K[R], where R is the round number we are

on.

6. Increment R by 1 and repeat the procedure until we have all 16 sub keys K[1]-K[16].

Once the key scheduling and plaintext preparation have been completed, the

actual encryption or decryption is performed by the main DES algorithm. The 64-

bit block of input data is first split into two halves, L and R. L is the left-most 32

bits, and R is the right-most 32 bits. The following process is repeated 16 times,

making up the 16 rounds of standard DES. We call the 16 sets of halves L[0]-

L[15] and R[0]-R[15].

.



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Chapter 5

IMPLEMENTATION

5.1 WHY JAVA IS USED?

The main use of Java would be as applets, small Java programs embedded in web

pages. Applets offered the benefit of a fully fledged programming language

allowing developers to embed just about any functionality. Java is a powerful,

portable object oriented (OO) programming language. A program written in Java

on a PC can easily find its way into many different computing platforms. This

makes Java a popular language for application development.

Java programs can do several actions at the same time, called multi-

threading. A well-written Java program can process data in one thread while

waiting for user input in another thread.

The JVM provides a secure runtime environment by managing memory,

providing isolation between executing components in different namespaces, array

bounds checking, etc. The dynamic way in which the JVM allocates the various

memory areas (method area, GC heap, thread stacks) means that it is almost

impossible for a would-be attacker to determine what memory areas to attempt to

insert malicious instructions into. Bounds checking on arrays prevent

unreferenced memory accesses.

5.2 MODULES

The system deals with security during transmission of data. Commonly used

technologies are cryptography. This system deals with implementing security

using Steganography. In this the end user identifies a video, which is going to act

as the carrier of data. The data file is also selected and then to achieve greater

speed of transmission the data file and video file are compressed and sent. Prior to

this the data is embedded into the video and then sent. The video if hacked or

interpreted by a third party user will open up in any video player but not

displaying the data. This protects the data from being invisible and hence be



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secure during transmission. The user in the receiving end uses another piece of

code to retrieve the data from the video.

The Modules of the system are:1 Steganography Module

2 GUI Module

3 Security Module

4 Server Module

5.2.1 STEGANOGRAPHY MODULE

The module deals with identifying the hidden data in the video file. The module

receives the video file that is then browsed to remove the associated data. The data

is then removed from the video file.

Data Embed: This module deals with identifying the data and the image to

embed the data into the image before it can be transmitted. This is then followed

by compression to increase the rate of transfer of files between the networks. The

module opens by prompting the user to identify the file that need to be transmitted

across the network. The file is then selected using the GUI interface provided

through JAVA. The module then prompts to identify the video file, which needs

to house the data file. The developed system will provide support to select and

embed data into .mpeg & .dat files. The selected video file is then played before it

can house the data. The data is then embedded into the video file in such a way

that the video file is not corrupted; at the same time the data is secure. The video if

hacked or interrupted by a third party can be played in any browser without

actually displaying the data.

Data deEmbed: The data on the receivers end is isolated and removed from

the video. The module deals with identifying the hidden data in the video. The

module receives the video file that is decompressed and decompresses it using

JAVA UTILITY PACKAGE. The decompressed file is then played to play the

video file. The video file is then browsed to remove the associated data. The data

is then removed from the video file.



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Chapter 6

TESTING

6.1 INTRODUCTION

The process of executing a system with the intent of finding an error is

called testing.

Testing is defined as the process in which defects are identified, isolated,

subjected for rectification and ensured that product is defect free in order

to produce the quality product and hence customer satisfaction.

Quality is defined as justification of the requirements.

Defect is nothing but deviation from the requirements.

Defect is nothing but bug.

Testing --- The presence of bugs.

Testing can demonstrate the presence of bugs, but not their absence.

Debugging and Testing are not the same thing.

Testing is a systematic attempt to break a program or the AUT

Debugging is the art or method of uncovering why the script /program did

not execute properly.

6.2 TESTING METHODOLOGY

1 Black box Testing: is the testing process in which tester can perform testing

on an application without having any internal structural knowledge ofapplication.

Usually Test Engineers are involved in the black box testing.

2 White box Testing: is the testing process in which tester can perform testing

on an application with having internal structural knowledge.

Usually The Developers are involved in white box testing.

3 Gray Box Testing: is the process in which the combination of black box and

white box tonics are used.



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6.3 TEST CASES

T.C.No Description Exp Act Result

Table 6.3: Template for Test Case

6.3.1 GUI Test Cases:

Total no of features that need to be check

Look & Feel

Look for Default values if at all any (date & Time, if at all any require)

Look for spell check

T.C.No Description Expected

value

Actual

value

Result

1

Check for all the

features in the

screen

The screen

must contain

all the features

2

Check for the

alignment of the

objects as per the

validations

The alignment

should be in

proper way

Table 6.3.1: Example for GUI Test cases

6.3.2 Negative Test Cases:

Must have negative perception.

Invalid inputs must be used for test.


value

Actual value Result

1 Input username

and password

Login Page Login Page Login Page

Table 6.3.2: Example for Negative Test cases

6.3.3 Positive Test Cases

The positive flow of the functionality must be considered



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Valid inputs must be used for testing

Must have the positive perception to verify whether the requirements are

justified.

The positive flow of the functionality must be considered

Valid inputs must be used for testing

Must have the positive perception to verify whether the requirements are

justified.


value

Actual value Result

1 InputUserName and

Password

Redirect toHomePage

Redirect toHome Page

Redirect toHome Page

Table 6.3.3: Example for Positive Test cases

Chapter 7



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RESULTS

7.1 HOME PAGE

Fig 7.1: home page

To start the project batch file much be executed

All the path must be set before executing the batch file

After this batch file is run we obtain the above window having various

options available

7.2 ENCRYPTION: STEP 1



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Fig 7.2: encryption (step 1)

The first step of the project to encrypt the data i.e. the text file

This window appear after clicking over the tab option named security then

selecting encrypt

After specifying the path of the file to be encrypted we need to specify any

key word known to only sender and receiver

After specifying the key word press ok




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after clicking over ok we obtain the above window

this window ask a name for the encrypted file

click over save the file will be saved




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this is the last step of encryption

a dialog box pop ups conforming that the file is encrypted and saved as

shown in the above screenshot

7.5 EMBEDDING: STEP 1



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Fig 7.5: embedding (step 1)

now a video file is to be embed along with the encrypted file

this window is obtained after clicking oversteg utility option provided

we need to browse to the encrypted file as well as to the video file

click over the embed option



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7.7 SENDING FILE: STEP 1

Fig 7.7: sending file (step 1)

after clicking over the send option IP address will be asked of the system

connected

provide the IP address in the space provided and press ok



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after pressing ok this window will be displayed asking for the file to be

send

make sure that you have selected the video file which you have embedded

press open



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after clicking over open in the last window this window will appear

confirming the IP address

press yes if correct



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7.10 DE-EMBED: STEP 1

Fig 7.10: de-embed (step 1)

now from here the work at the receiver side starts

this window is obtained after clicking over option steg utility and then de-

embed

you have to specify the path of the received video file

it is always stored in one of the project folder named workspace

press de-embed



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7.11 DE-EMBED: STEP 2

Fig 7.11: de-embed (step 2)

this window confirms the completion of de-embedding process

press ok to proceed



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7.12 DE-ENCRYPTION: STEP 1

Fig 7.12: de-encrypt (step 1)

this is the window which is obtained by clicking over option security and

then decrypt

browse to the encrypted file

you will be asked the key word that you have entered will sending the file

press ok



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7.13 DE-ENCRYPTION: STEP 2

Fig 7.13: de-encrypt (step 2)

this window confirms the completion of the decryption process

press ok



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Chapter 8

CONCLUSION AND FUTURE ENHANCEMENT

Steganography, especially combined with cryptography, is a powerful tool which

enables people to communicate without possible eavesdroppers even knowing

there is a form of communication.

In our project we have successfully transferred a text file embedded with a

video file hidden from the third party. It is not possible to develop a system that

makes all the requirements of the user. User requirements keep changing as the

system is being used.

Some of the future enhancements that can be done to this system are:

As the technology emerges, it is possible to upgrade the system and can be

adaptable to desired environment.

Because it is based on object-oriented design, any further changes can be

easily adaptable.

Based on the future security issues, security can be improved using

emerging technologies.



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REFERENCES

1) William Stallings, Cryptography and Network Security, Pearson, Fourth

Edition.

2) Herbert Shieldict, Java Complete Reference, TATA-McGraw-HILL, 7th

Edition.

3) Shabadimath.P.C, Modern Dictionary, Book- Depot, Re-Corrected

Edition.

4) Project Management URL: http://www.startwright.com/project.html

5) http://it.toolbLox.com/wiki/index.php/Warehouse_Management

6) http://en.wikipedia.org/wiki/DES

7) http://en.wikipedia.org/wiki/Encrypyion

8) http://en.wikipedia.org/wiki/Steganography

9) Kathy Sierra and Bert Bates, Head First Java, OReilly, 2nd Edition.

10) Project Management URL: http://www.startwright.com/project.htm

11) http://it.toolbLox.com/wiki/index.php/Warehouse_Management

12) Steganography and Steganalysis: Different Approaches by Soumyendu

Das

13) Exploring Steganography: Seeing the Unseen by Neil F. Johnson, Sushil

Jajodia, George Mason University IEEE Computer, February 1998: 26-34.

Available:http://www.jjtc.com/pub/r2026.pdf



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