An Information Hiding Scheme in Wavelet Domain using Chaos Dynamics

Abstract

In this paper an information hiding scheme in images has been proposed in transform domain using four point Daubechies Wavelet where Horizontal, Vertical and diagonal coefficients of the transformed matrix are used to embed the secret information which itself scrambled using cross coupled chaotic map with 3.5bpB payload. Transformation coefficients are prehandled through multiplying by π to overcome loss of precession. Embedded matrix is adjusted prior to reverse transformation to obtain optimal change in the embedded images which follows the inverse transformation to produce the embedded image in spatial domain. The results obtained are compared with existing techniques which shows better performance of the proposed scheme in terms of payload and quality of embedded image.