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DNA CRYPTOGRAPHY

Certificate

This is to certify that Garima Jindal (1127/06), Charu Sharma (1138/06), Bismita Mohanty(1139/06) were working under my supervision on the project DNA Cryptography. This project

was carried out by the above mentioned students as a part of their curriculum for B.Tech (7 th

semester) in Information Technology.

The project report submitted by them is a bonafide record of their work and the contents of the

report, in full or in parts, have not been submitted to any other institute or university for award of

any degree or diploma.

Date:. (Mr. Virender Kumar Ranga)

Ass. Prof. ,NIT KURUKSHETRA

Dept. of Computer Engineering

NIT Kurukshetra

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Certificate

We hereby certify that the work which is presented in the dissertation entitled DNA

Cryptography in fulfillment of the requirement for the award of the degree of B.Tech andsubmitted to the Department of Information Technology of National Institute of Technology

Kurukshetra, Kurukshetra, is an authentic record of our own, carried out during a period of July

2009 December 2009, under the supervision of Mr. Virender Kumar Ranga.

We have not submitted the matter presented in this dissertation for the award of any other degree

in any other institute/university.

Garima Jindal(1127/06)

Charu Sharma(1138/06)

Bismita Mohanty (1139/06)

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Acknowledgement

The satisfaction that accompanies the successful completion of any task would be incomplete

without the mention of the people who made it possible and whose constant guidance andencouragement allowed us to complete the project with success.

We would like to take the opportunity to express our sincere thanks to our project guide, Asst.

Prof. Virender Kumar Ranga for providing us the right direction for the conduction of the project

and also for his enlightening guidance that was vital for the successful completion of the project.

Garima Jindal(1127/06)

Charu Sharma(1138/06)

Bismita Mohanty (1139/06)

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ABSTRACT

DNA cryptography is a new born cryptographic field emerged with the research of DNA

computing, in which DNA is used as information carrier and the modern biological technology is

used as implementation tool. The vast parallelism and extraordinary information density inherent

in DNA molecules are explored for cryptographic purposes such as encryption, authentication,

signature, and so on. The main purpose or goal of the project is to implement the basic

fundamentals of DNA Cryptography using the Java platform so as to produce an encoding tool

capable of applying the elementary encoding transformations to the text.

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List of Figures

Fig 1.2.1 Double helix structure of DNA 2

Fig 1.12.1 Data pre(post) treatment flow chart 12

Fig 1.12.2 Flow chart of encryption scheme system 13

Fig 1.12.3 Result of PCR amplification 14

Fig 3.4.1 Use Case Diagram (Encoder) 24

Fig 3.4.2 Use Case Diagram (Decoder) 25

Fig 4.1 Project overview 27

Fig 5.2.1 Flow Diagram (Encoder) 29

Fig 5.2.2 Flow Diagram (Decoder) 30

Fig 5.3.1 Class Diagram (Encoder) 31

Fig 5.3.2 Class Diagram (Decoder) 32

Fig 5.3.3 Class Diagram (KeyGen) 33

Fig 7.1 Snapshot (Original text) 41

Fig 7.2 Snapshot (Encoded text) 42

Fig 7.3 Snapshot (Decoded text) 43

List of Tables

Table 1.3.1 Amino acids and codes 3

Table 1.13.1 The Huffman code 16

Table 1.13.2 General features of the codes 18

Table 1.13.3 Advantages of the codes 18

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Index

CHAPTER 1 INTRODUCTION 1-19

1.1 DNA Cryptography 1

1.2 DNA 1

1.3 Amino Acid codes 3

1.4 Primer 3

1.5 Transcription and Translation 4

1.6 Cryptography 5

1.7 Advantages of DNA Cryptography 5

1.8 Limitations of DNA Cryptography 6

1.9 Comparison between traditional and DNA Cryptography 6

1.10 Development direction of DNA Cryptography 7

1.11 DNA Digital Coding Technology 9

1.12 System design of encryption scheme 10

1.13 The codes 14

CHAPTER 2 OBJECTIVE 20-21

2.1 Objective 21

2.2 Product Perspective 21

CHAPTER 3 SYSTEM REQUIRMENT ANALYSIS 22-25

3.1 Characteristics 23

3.2 System Requirements 23

3.3 Technology Used 24

3.4 Use case diagram 24

CHAPTER 4 PROJECT OVERVIEW 26-27

CHAPTER 5 SOFTWARE DESIGN 28-33

5.1 Methodology of encryption scheme 29

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5.2 Flow Diagram 29

5.3 Class Diagram 31

CHAPTER 6 SOFTWARE TESTING 34-39

6.1 Testing methodology 35

6.2 Testing Objectives 35

6.3 Testing Techniques 35

6.4 Testing Strategies 38

CHAPTER 7 PROJECT SNAPHOTS 40-43

7.1 Text file 41

7.2 Encoded file 42

7.3 Decoded file 43

CHAPTER 8 CONCLUSION 44-45

CHAPTER 9 FUTURE PROSPECTS AND ENHANCEMENTS 46-47

Appendix 48

Bibliography 49

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