Image Encryption using Integer Wavelet Transform, Chaotic Maps and DNA rules

Abstract

In this computerized 21 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">st</sup> century, medical field has grown to great heights, that the patient has no need to carry his medical records in black and white, but could get them transferred through any communication medium via cloud whenever required. The medical records mainly consists of non-image data and image data. The image data, primarily in digital format has to be transmitted in a way more securely, since all transmission of data occurs via unsecure channels of media through internet. In medical field this process is known as “Medical Image Sharing”. The attacks on the medical images by the intruders may lead to disruptions or may alter the information to a wrong patient. In this business era, the details of a patient can be completely be misused to risk the patient's life. Hence, there are many methods to securely share the medical images using encryption and chaotic maps. Here, secureness is done by admixing three levels of scrambling using IWT (Integer Wavelet Transform), multi-chaos using three alternating chaotic maps (logistic map, tent map and complex quadratic chaotic map), and encrypting the image by alternating the eight special rules of the helical DNA (Deoxyribo Nucleic Acid) along with alternating XOR (Exclusive OR gate), XNOR (Exclusive negative OR gate) logic and piece-wise linear chaotic map within the rules. The obtained results have been validated to transmit a medical image in a more secure way.