Enhanced lsbase: a dna based security scheme to augment audio steganography
International Journal of Latest Trends in Engineering and Technology · 2016
The explosive growth of computer system and their interconnection via computer networks such as internet has led to a heightened need for information and data security.The growing use of internet has led to a continuous increase in the amount of data that is being exchanged and stored in various digital media.In network it is very important to protect the data.In order to achieve this there are several technologies being used.One of the secured ways to protect the data is encryption and decryption method [10].Cryptography is the science and art of protecting information by scrambling its content into unreadable format called ciphertext.Cryptography system can be broadly classified into symmetric system that use a single key for both encryption and decryption, and asymmetric systems that use one key for encryption and another for decryption.The Data Encryption Standard (DES) is the most common symmetric cryptography method that is in use today.Examples of asymmetric cryptography algorithm include RSA, Diffie and Hellman and Digital Signature Algorithm (DSA) which is a variant of ElGamal.The objective of secure communication is that actual data should not be revealed to any third party.Steganography techniques are most successful technique in supporting hiding of critical information in ways that prevent the detection of hidden messages.While cryptography scrambles the message so that it cannot be understood [10].The conventional methods of encrypting are not strong enough today for providing the data security and reliable data transmission.Unauthorized user or intruders may attack and can interrupt or intercept the message for doing some malicious tasks.In order to enhance the data security effective encryption algorithms are required.Recent research has shown DNA as a medium for large scale computation system [2].DNA computing is a new method of simulating bimolecular structure of DNA and computing by means of molecular biological technology which is a novel and potential growth.Adleman demonstrated the first DNA computing.It marked the beginning of a new stage in the era of information.DNA (Deoxyribonucleic Acid) is the germ plasma of all life styles [9].Two different kinds of genetic material exist, Deoxyribonucleic acid (DNA) and Ribonucleic Acid (RNA) present in a cell.DNA contains four types of nucleotides like, Adenine (A), Thymine (T), Cytosine (C) and Guanine (G).James D. Watson and Francis Crick were the two co-discoverers of the structure of DNA in 1953 [14].In a double helix DNA string, two strands are complementary in terms of sequence, that is A to T and C to G according to .There are a large number of DNA sequences publicly available in various domains of biological DNA.A rough estimation would put the number of DNA sequences publicly available in various websites are around to be 55 million [4].Shyamasree C M and Sheena Anees in [13] proposed DNA based playfair cipher.A binary form of data are transformed into sequences of DNA nucleotides subsequently these nucleotides pass through a playfair encryption process based on amino acids structure.The relationship between the nucleotide sequences of genes and the amino acid sequences of proteins is determined by the rules of translation, known collectively as genetic