Image Encryption Scheme Based on Amplitude Modulation of Chaotic Signals

Abstract

We introduce a three-dimensional chaotic system and reveal the relation between signal amplitude and the system parameters which can enrich the key for a cryptosystem. To study application of the relation to multi-media security, we propose an image encryption scheme based on the permutation-diffusion architecture. Security of immunity to known-plaintext attack and chosen-plaintext attack is ensured by adopting plaintext sequence and amplitude parameter to generate key stream with the ideology of one-time pad. Numerical experiments are implemented and prominent advantage of the theoretical scheme is confirmed.