An improved fragile watermarking algorithm for JPEG images

摘要

In this paper a new fragile watermarking algorithm is proposed that is built upon the cryptanalysis of the CWSA algorithm (Chaotic Watermarking Scheme for Authentication of JPEG Images - Wang et al. [141). The proposed algorithm preserves the advantages of CWSA, but is robust against cryptanalysis, faster and less perceptible. It uses two chaotic maps: the piecewise linear chaotic map and a chaotic generator composed of two perturbed recursive filters with a nonlinear function, the Skew Tent map. Experimental results show that the proposed algorithm provides good performances in terms of security, imperceptibility, speed and resistance to cryptographic attacks. (C) 2015 Elsevier GmbH. All rights reserved.