Bit based symmetric encryption method using DNA Sequence

In the present era, with the increase in technological development, threat for data security grows exponentially. With the current technological growth, it is very difficult to secure the data using the traditional cryptographic and Steganographic approach. DNA cryptography is a new field in the area of information security. It is a combination of both biological and computer domain. It provides security by using the properties of DNA and other arithmetic operations. In this paper, the authors present a new method for providing security of the data using DNA sequence as a key and complementary rule pairs. This method can encrypt any data whether it is image, audio, video or text file. The proposed method depends upon the complexity of key and the complementary rules. The proposed method improve the level of security as in this actual data is never transmitted.