A NOVEL CRYPTOGRAPHY APPROACH BASED ON GENETIC ALGORITHM

Images play an important role in our lives. They are used in many applications. Therefore it is always necessary to affirm the integrity and confidentiality of the digital image that are being transmitted. With the progress in data exchange by electronic system, the need of information security has become a necessity. Moreover due to growth of multimedia applications, security becomes an important issue of communication and storage of images. Encryption and Decryption is used to securely transmit data in open networks. The principle goal of designing any encryption and decryption algorithm is to hide the original message and to send non readable text message to the receiver so that secret message communication can take place over the web. The strength of an algorithm depends on the difficulty of cracking the original message. And proper combination of both encryptions that provides confidentiality and hashing which leads to integrity of image transferred provide an ideal alternative. In this paper, we provide a novel cryptographic approach based on genetic algorithm. Here, blowfish algorithm is used for image encryption and decryption and the Genetic algorithm is used to determine the key for the algorithm, which is an important aspect in any cryptographic algorithm. The approach is expected to provide high level of security to the image with less computational head to improve the image security, proper combination of encryption as well as authentication techniques always presents an ideal alternative.