A robust technique to generate unique code DNA sequence

DNA computing works for DNA cryptography which is an emerging field. For data secure we initiate a current technique by accepting the biological structure of advanced DNA called DNA computing. There are several problems like NP complete problem solved by Adlmen. In RSA algorithm A refer to Adleman [6]. Now a day's internet has become the media for all banking, electronic commerce and communication transactions. It is very essential to provide high security for communication. To fulfill this requirement many traditional techniques like AES, DES, RSA, HASH FUNCTIONS etc. have been used for encryption and decryption of plain text. Even though these are good for security but computation complexity is increased. To overcome this draw back a new technique based on DNA is proposing in this project work. The main Futures of DNA Cryptography are Robustness, Confidentiality, Randomness, Dynamicity, Complete Character Set Fulfillment and Uniqueness. In this DNA four volumes of nucleotides they are A-adenine, C-cytosine, G-guanine & T-thymine. These 4 nucleotides carries the genetic information of a particular living thing. In order to provide better security and reliable data transmission an effective method of DNA based cryptography is proposed. In DNA cryptography method mixture of mathematical and biological concepts are used to get the encrypted data in the form of DNA sequences. By applying those 4 nucleotides we will encrypt the data in the form of DNA sequences. First and foremost thing is we will encode those nucleotides as in two bit binary format as A-00, C-01, G-10, T-11.there are two steps to encode the plain text. Firstly find ASCII code for each letter in the plain text and convert it into binary format and from that we find DNA sequence so that we get four letter DNA sequence for each letter. So in this procedure the main limitation is the data may not be secured (i. e intruders easily covert cipher text to plain text) but advantage is transmission rate take less time due to less length. So to provide more security a “robust technique” for generating the unique code DNA sequence. This technique performs same as DNA cryptography method but here we perform some operations they are addition and multiplication of DNA characters. The cipher text generated from this will be large and so it is more secure compared to existing method. But here also one limitation i.e the transmission rate of data should take large amount of time. So further proposed “DNA compression technique” to reduce the transmission rate.