Abstract
Research in information Security is very much essential as there is an increase in data breach. DNA cryptography is one of the invention in the field of data security which provides hope for an unbreakable algorithm. This paper presents a multi-level hybrid crypto system based on DNA cryptography and DNA steganography. The proposed method uses a DNA sequence from publicly available DNA data base as a onetime pad. Initially plaintext is converted into DNA form of cipher text and then using central dogma of molecular biology concept DNA strings are converted into amino acid codes which represents the protein form of data. The crux of the algorithm lies on the one-time pad used for encryption process. The proposed system combines the advantages of DNA cryptography, DNA steganography and one time pad. Security analysis shows that proposed method is strong enough to resist brute force attacks as well as cryptanalytic attacks.
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