Security and Information Hiding based on DNA Steganography

DNA cryptography is a new field which has emerged with progress in the research of DNA computing. As a special cryptography, DNA steganography is safer than ordinal cryptography, only if the primer sequences are concealed from an adversary however this is not easy . DNA cryptography and steganography differs from the conventional cryptology in the terms that the keys and the cipher texts are all biological molecules. The security of DNA-PKC relies on difficult biological problems instead of computational problems. We have researched on how to overcome the security deficiency of DNA steganography and developed a message hiding method based on DNA steganography. We designed some procedures to encrypt a message and then decompose the cipher text into two parts. The sender uses DNA steganography to send one part. If the microdot is assumed or contaminated, the message will be encrypted and decomposed again and again until the microdot is not assumed or contaminated. If the microdot is not assumed or contaminated, the corresponding part will be publicly sent. The novelty of the proposed method is that introduced message decomposing to solve the security problem of DNA steganography.