A Multiphase Cryptosystem with Secure Key Encapsulation Scheme Based on Principles of DNA Computing

DNA cryptography is an upcoming field in the cryptography area. We introduce a hybrid cryptography method based on RGB colors, where the security of data is improved by using a data encryption algorithm and that of key is enhanced by means of an algorithm based on DNA steganography. Information can be encoded by using any schemes like ASCII or UNICODE. Plain text is converted to matrix form which is then passed through a number of manipulation steps. Security is further enhanced by using a strong key which is encapsulated by using DNA steganography method. As the next layer of security we propose encryption using DNA bases and amino acids. For this, some DNA techniques like coding are used. The fundamental idea is to provide a multiphase cryptosystem by combining DNA and Amino Acids concepts to other security techniques. Finally, the cipher form is converted to colors to improve the level of security.