Security of fragile watermarking scheme for image authentication
K-C Liaoa, W-B Leea, C-W Liaob · The Imaging Science Journal · 2006
Recently, Lu et al. proposed a fragile watermarking scheme to prevent the quantization attack. However, the present study shows that the modified scheme's objective as a fragile watermark is unfortunately lost, because it is possible for any attacker to copy a watermark from one image into another without knowing the watermark owner's insertion keys.