A Chaotic-based Encryption/Decryption System for Secure Video Transmission

Ultrasonic communication is an alternative communication method of transmitting information through solids. Sending video streams can deliver more information than a single sensor, and video monitoring shows great potential in ultrasonic communication applications. An efficient and secure cryptosystem is needed to protect the sensitive video stream. In this paper, we propose a novel Chaotic-based encryption scheme utilizing 1-D and 2-D iteration models for secure video streaming. This algorithm is based on the Arnold Cat Map and the Logistic Map and has good confusion and diffusion properties. The Arnold Cat Map transforms the dataset into a pseudo-random state over several iterations and is reversible, while the Logistic Map introduces a specific external key to replace and recover the pixels value during encryption and decryption. Both the encryption and decryption processes are presented and formulated in our cryptosystem scenario. The proposed method maintains a good encryption quality, provides key sensitivity and has low correlation between pixels. The results of a secured video frame using separate Chaotic Maps and the novel encryption scheme are compared and discussed. Experiments and analysis demonstrate that the Chaotic-based algorithm is best suited for the ultrasonic video communication system and is resilient to security attacks.