Embedded implementation of multispectral satellite image encryption using a chaos-based block cipher

Abstract

Image transmission from earth observation satellites to ground station is exposed to threats that can affect the confidentiality of data. One of the crucial tasks of on-board computer systems is to ensure the confidentiality of data transmitted from the satellites to the ground stations. Throughout the last two decades, Chaos based data confidentiality has reached a significant achievement. In this paper, we propose a new multispectral image encryption method based on Fridrich's scheme. The obtained experimental results show that the proposed method has a good security level with low hardware complexity and low power and can reach a throughput of 120 Mbit/s. Keywords: Image encryption, Fridrich's scheme, Arnold’s Cat map, Piece Wise Linear Chaotic Maps (PWLCM)