  Cryptography is the science that secures data and communication over the
network by applying mathematics and logic to design strong encryption methods.
In the modern era of e-business and e-commerce the protection of
confidentiality, integrity and availability (CIA triad) of stored information
as well as of transmitted data is very crucial. Deoxyribonucleic acid (DNA) is
a genetic molecule consisting of two linked strands that wind around each other
to form a double helical structure. The backbone of each strand is made of
alternating deoxyribose sugar and phosphate groups. To each sugar one of four
bases are attached i.e., adenine (A), cytosine (C), guanine (G) and thymine
(T). DNA molecules, having the capacity to store, process and transmit
information, inspires the idea of DNA cryptography. It is the rapid emerging
unconventional techniques which combines the chemical characteristics of
biological DNA sequences with classical cryptography to ensure non-vulnerable
transmission of data. This innovative method is based on the notion of DNA
computing. The methodologies of DNA cryptography are not coded mathematically;
thus, it could be too secure to be cracked easily.
