A Novel Video Encryption Scheme Using Chaotic Map Based Simultaneous Permutation-Diffusion
Deepti Dhingra, Mohit Dua · 2024
The need for robust video encryption is driven by the increasing demand for secure multimedia transmission and storage. Traditional encryption methods often fail to account for the high data volume and real-time constraints of video content. Chaos-based cryptography have intrinsic features like extreme sensitivity to initial conditions, deterministic, random, topological mixing, unpredictability. This paper presents a novel video encryption scheme using our earlier presented 2D Cosine-Sine chaotic map. The scheme comprises mainly five steps: (i) Retrieve each frame from the video separately and encrypts them one by one. (ii) The frame is converted into grayscale for simplicity. (iii) The Dynamic version of 2D Cosine-Sine map is created. (iv) The map is used to generate chaos matrix and chaotic sequence that is used for permutation and diffusion respectively. (v) We have introduced a simultaneous permutation and diffusion method in which as each pixel is permuted, it is immediately diffused before moving on to the next pixel. It reduces the need for multiple passes over the data, potentially speeding up the encryption process and enhance security. (vi)The grayscale frame is converted into BGR form. The efficiency of the scheme has been tested using various parameters.