Image Encryption Algorithm based on Circular Shift in Pixel Bit Value by Group Modulo Operation for Medical Images

摘要

In this paper, we propose a lossless encryption and decryption algorithm that is applicable in the medical image. Medical images contain information and characteristics related to disease and patient that need lossless image transmission for accurate diagnosis. This algorithm performs encryption process using Circular bit Shift using group modulo operation. Circular bit shift process applied on pixel bit values of an image to create a new pixel bit value of encrypted image by using group modulo operation. In this algorithm the initial value that associated with Group modulo operation plays an important role as a key value. This algorithm is lossless technique to recover the encrypted image successfully without any loss of data or information. This technique is also applicable in multimedia applications for image, data or information transmission.