A Novel Encryption/Decryption Framework for Ultrasonic Secure Video Transmission

Ultrasonic communication is proven to be reliable for transmitting data, images, and video streams through solid channels to overcome certain physical barriers which prevent conventional wired or wireless communication networks. In this study, we propose a novel encryption framework for securing the video stream transmission while taking into consideration the characteristics and constraints associated with ultrasonic communication through solid channels. In this framework, a Chaotic encryption algorithm employing the 2-D Around Cat Map and 1-D Logistic Map is used to confuse and diffuse the video stream. A benchmark system was designed to examine the performance of the Chaotic encryption algorithm applied to ultrasonic video transmission. The horizontally adjacent pixels in a video frame and the same pixel in two consecutive frames are randomly selected to evaluate the frame-to-frame pixel correlation before and after encryption. The scatter plots and the correlation coefficient reveal that the Chaotic encryption fully scrambles and diffuses the original video stream.