IMAGE ENCRYPTION USING A COMBINANTION OF HAAR AND DNA ALGORITHM
Rohit Kumar, Bhanu Pratap, Vaibhav Kant Singh, M. Tech Scholar, M. Tech Scholars · 2014
Abstract — In last few decades, digital information sharing has become more common with the fast development of Internet. However, in open networks, it is very much important to keep sensitive information such as military and medical images secure from becoming vulnerable to unauthorized access. The development of fast and efficient cryptographic schemes is thus essential to the provision of multimedia security. Information security becomes more important with the fast progression of data exchange in electronic form. Pixels are the basic elements of an image, so in order to encrypt an image we have to encrypt the information hidden in each pixel. Pixel’s position values can also be used for encryption purpose. Technique of image encryption should be strong enough so that the encrypted image could contain good properties that may undergo most of the testing criteria. In our work we first compress the image using Haar wavelet transformation and then encrypt it using DNA algorithm. Wavelets are mathematical functions that were developed for sorting the data by frequencies. A Wavelet transformation converts data from the spatial into the frequency domain and then stores each component with a corresponding matching resolution scale. By applying the Haar wavelet transform we can represent this image in terms of a low-resolution image and a set of detail coefficients. Haar Transform is nothing but averaging and differencing. DNA algorithm is used for further encrypting the image. This technique will change the data into unreadable form.