Image Encryption Using Chaotic Maps in Hybrid Domain

Abstract

All image encryption systems are in the single domain. Hybrid domain (frequency and time domain) system is proposed to make the system more secured. We use the chaotic maps to generate pseudo random images. Since the chaotic maps have very good properties ,it will help us to encrypt the image in more secured manner. In our proposed system we employs two units: Transformation and substitution unit. We perform dft and dwt for the image. Transformation unit uses the tent map and substitution unit uses Bernoulli map.