A Fragile Watermarking Scheme for Temper Detection
Ling Xing · Journal of Information and Computational Science · 2014
A fragile watermarking scheme which can detect the tampered areas of an image is proposed. The proposed scheme is quantization-based and can detect the tapered pixels with high accuracy. DES (Data Encryption Standard) algorithm is applied to generate watermark sequences and a HVS (Human Visual System) model is used to calculate the step size of embedding. Security of the proposed algorithm depends on a secret key. Attackers would not crack the watermark even they know the encrypting algorithm and watermarking scheme. The proposed scheme has high level of imperceptibility and high performance with low computational complexity. Experimental results indicate the effectiveness and efficiency of the proposed scheme.