Biological Alphabets and DNA-based Cryptography

The redundancy in English language makes cipher easier to attack.The base 4 system of DNA is lack of linguistic properties found in human languages and has higher expressive power per symbol.In this paper, we propose representing information using biological alphabets (including those of DNA, RNA and protein) to enhance the security of ciphertext, using DNA sequence for secure communication and key distribution, and using the chemical information of biological alphabets for steganography -Information Hiding.