This document describes a proposed DNA-based cryptography and authentication system. The system aims to provide secure data transmission across networks using a novel DNA-based approach. It involves encrypting plaintext messages into DNA sequences using symmetric or asymmetric encryption algorithms. The encrypted DNA sequences can then be transmitted and decrypted back to the original plaintext. The proposed system implements a double layer of encryption using both RSA and DNA-based cryptography for enhanced security. It is intended to securely transmit messages, emails, and files across both local and wide area networks.

1. DNA BASED CRYPTOGRAPHYAND
AUTHENTICATION SYSTEM
Project Guide : Mrs.Thasleena V
Presented By :GROUP 1
ABDUL RASHEED (CEALEIT002)
1

2. INTRODUCTION
 Data security and cryptography are important aspects of conventional
computing.
 The aim of our project is to design DNA based cryptography and
authentication which is a novel approach to ensure highly secure
environment for transmission of data across networks.
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3. 3
 Cryptography is the process of scrambling the original text by rearranging and
substituting the original text, arranging it in a seemingly unreadable format for
others. Two types of cryptography are:
 Symmetric encryption
 Symmetric encryption is a single key encryption and also known as
conventional encryption. The symmetric encryption algorithm
generally uses the same key for “encryption” and “decryption”.
 Asymmetric encryption
 Asymmetric encryption is also known as “Public key encryption”. In
asymmetric encryption, the encryption and decryption will be done by
two different keys.
LITERATURE SURVEY

4. 4
 DNA cryptography is First introduced by L. Adleman in 1990s in which
Plaintext message Encoded into DNA sequences.
 DNA sequence : Order of nucleotide bases in the DNA molecule.
ATTAGCCTTATGCATGAACC
 Gehani et. al., introduced the first trial of DNA based Cryptography in which a
substitution method using libraries of distinct one time pads, each of which
defines a specific, randomly generated, pair-wise mapping and an XOR scheme
utilizing molecular computation and indexed, random key strings are used for
encryption .
LITERATURE SURVEY (Cont.)

5. 5
 Leier et. al. presented two different cryptographic approaches based on DNA binary
strands with the idea that a potential interceptor cannot distinguish between dummies
and message strand . The first approach hid information in DNA binary strands and
the second designed a molecular checksum.
 Decryption is done using PCR and subsequent gel electrophoresis.
LITERATURE SURVEY (Cont.)

6. 6
SURVEY COMPARISON REPORT
S.
No
METHODS ADVANTAGE DISADVANTAGE
1 DNA based
implementation of
YAEA encryption
algorithm[2006]
•Real message is not
transferred over network.
•Scalable for large digital
information products.
•Size of plain text
increases the
encryption and
decryption time.
2 DNA encryption
based on matrix
manipulation.[2008]
•Always get new cipher
data from same plain text.
•It include only basic
operation and security
only depends on key.
3 Encryption scheme
using DNA
technology.[2008]
•Prevent attack from a
possible word as PCR
primers.
•Cost of encryption is
low.
•Security can depend
only on decryption
key.

7. 7
• Jin-Shiuh Taur Proposed a way referred to as Table Lookup Substitution
methodology (TLSM) that might double the capability of message activity.
The key plan of the TLSM is to increase the 1-bit complementary rule into
a 2-bit rule table so every conversion of letters will represent 2 bits of the
secret message.
• Cheng Guo, Shiu Proposed the hiding procedure substitutes another letter
for an existing letter on a special location set by the algorithm. The
embedding algorithm encompasses a conversion operates that converts a
given letter with a selected letter outlined by the complementary rule.
EXISTING SYSTEM

8. 8
 Kritika Gupta and Shailendra Singh Projected a DNA Based Cryptological
Techniques for an encryption algorithm based on OTP (one-time-pad) that
involve data encryption using traditional mathematical operations and/or data
manipulating DNA techniques.
 Guangzhao Cui, Limin Qin, Yanfeng Wang, Xuncai Zhang Proposed a secrete
writing theme by exploitation the technologies of DNA synthesis, PCR
amplification and DNA digital secrete writing
EXISTING SYSTEM (Cont.)

9. PROPOSED SYSTEM
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 This project aims at providing an efficient solution for secured data
transmission both across a local area network and also via internet.
 The advantages of the proposed system are:
 Unbreakable security by taking the advantage of DNA based encryption.
 Double layer of encryption implementing RSA algorithm along with
DNA based cryptography.
 The type of data which we consider includes:
 Message send across a LAN
 E-mail using Gmail server
 All types of file encryption

10. 10
 The binary data, text or image, is used under the form of ASCII code .
 These numbers are then grouped in blocks and encrypted in using a
traditional method (eg. DES, will form a 2 level encryption).
 This encoded message is then changed to binary format.
 Then these digits are grouped into two and substituted as A for 00, T for
01, G for 10, and C for 11.
 We then fit the primers on either side of this message. Primers will act
as stoppers and detectors for the message. This has to be given to the
receiver prior to the communication.
 This message is followed by our own DNA sequence followed by
another stopper/primer.
 This message is then flanked by many sequences of DNA or by
confining it to a microdot in the micro- array.
PROPOSED SYSTEM (Cont.)

11. MODULES IN THE SYSTEM
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 User registration.
It deals with the user interactions. A user has to create his own
account to use the software. He is asked to enter certain details that would
be stored into a database. When he tries to login, the verification process is
done to provide access.
 Message service.
This service is provided to the authenticated user. He can send and
receive messages across the connected LAN. Whether to encrypt the text or
not must be decided by the user. The input given by the user is just the
recipient address, subject and the message text. It will be sent to the
corresponding user connected within the LAN.
 Email service.
This module deals with services related to sending and receiving of
mails. User has to configure the mail settings by defining the incoming and
outgoing mail servers.

12. MODULES IN THE SYSTEM
12
 Encryption
The process of DNA encryption is explained here. The plaintext is sent
to the encryption process and it is lead through a no: of steps to produce the
DNA encrypted form.
 Decryption
Here the process of encryption is just reversed to retrieve the plain text.
The encrypted ambiguity sequence is first encrypted using RSA to retrieve the
real key sequence. Then, using this key the amino sequence is decrypted to
get the ATGC sequence. This is converted to binary, then corresponding
ASCII values are taken and finally, the plaintext is retrieved.

13. Hardware and Software Requirements
13
 Hardware Requirements
 Processor - Intel Pentium IV or above
 RAM - 512 MB or above
 Hard Disk Drive - 40GB or above
 Software Requirements
 Operating System - Windows XP or above
 IDE – Net Beans version 6.9.1 or above
 Database - MySQL Database Server 4.0 or above
 Programming Language – Java

14. DATA FLOW DIAGRAM
 User Registration
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15. DATA FLOW DIAGRAM(Cont.)
 Messaging Service
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16. DATA FLOW DIAGRAM(Cont.)
16
 Mail Service

17. DATA FLOW DIAGRAM(Cont.)
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 File Encryption

18. DATA FLOW DIAGRAM(Cont.)
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 File Decryption

19. SCREENSHOTS
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20. 20
SCREENSHOTS

21. 21
SCREENSHOTS

22. 22
SCREENSHOTS

23. 23
SCREENSHOTS

24. CONCLUSION
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 Message encryption using DNA sequence is a very new technique still
evolving and tried out for secure transmission and reception of hidden
messages.
 Provide Authentication property using Digital Signature .
 Add function that will detect Modification of message.

25. 25
 RS Dhawan and Alice(2012). A new DNA Encryption technique for secure
data transmission. Research Scholar , Kurukshetera University, Haryana,
India.
 Guangzhao Cui , Cuiling Li , Haobin Li , Xiaoguang Li (2009). DNA
computing and its application to information security field. Research
ScholarHenan key Lab of information-based Electrical Application ,
Zhengzhou 450002.
 Pankaj Rakheja(2012). Integrating DNA computing in international data
encryption Algorithm(IDEA). Deep Institute of Engineering and
Technology, Haryana, India.
 Abdullah Al Mueen & Md. Nurul Amin Applications of Graphs in
Bioinformatics pp.16-50, 2006
REFERENCES

26. THANK YOU
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