Unlocking Secrets with DNA Cryptography 🧬 | Dr. M Sankari's Expert Lecture

Welcome to this lecture on DNA Cryptography. In this lecture, We will discuss about the following topics

Cryptography

It is the branch of science which deals with the encoding of

information for the purpose of hiding messages. Crypt- Hidden. Graphy -Writing. Plaintext- Known text(Ex : Hello).Ciphertext- Unknown text( Ex. RAVVC).Encoding/Encryption- Convert Plaintext to Ciphertext.Decoding – Convert Ciphertext to plaintext

DNA- Deoxyribo Nucleic Acid

The term “DNA” comes from molecular biology. DNA is made of chemical

building blocks called nucleotides.DNA molecules are made up of sequences of four nucleotides such as Adenine(A),Cytosine(C),Guanine(G),Thymine(T)

DNCryptography

It is used to hide data in terms of DNA Sequence(ACTG).It is the combination of Cryptography and DNA techniques to secure data in an efficient manner. It stores vast amounts of data in a very small physical space. It is preventing the misuse of genetic information.

Why DNA?

Very difficult to solve complex problems like directed Hamilton path problem and NP-complete problem by using cryptographic algorithms. But, with DNA, It is very

simple. No power is required for DNA computing while

computing. DNA computing offers more speed, minimal storage,

and power requirements.1 gram of DNA stores 108 TeraBytes of data.

DNA Addition

Consider one message and one key (Ex: 01011000 + 10101010)

Convert binary string to DNA sequences (A-00+ A-00🡺00)

01011000 –TTCA, 10101010 – CCCC

Add TTCA+ CCCC= GGAC

DNA Subtraction

Consider one Coded message and one key (Ex: 01011000 - 10101010)

Convert binary string to DNA sequences (A-00+ A-00🡺00)

01011000 –TTCA, 10101010 – CCCC

Sub TTCA - CCCC= GGAT

Advantage of DNA cryptography

High level of security,Complexity of DNA sequences and the difficulty of manipulating and decoding DNA molecules,Large key space,more difficult for attackers to find the correct key,Resistance to attacks,brute-force attacks and quantum computing attacks

Disadvantage of DNA cryptography

Technical complexity – Knowledge required for encryption and decryption.DNA cryptography is currently limited to certain applications, such as military and intelligence operations,due to the technical complexity and cost involved.
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