An Efficient Image Self-recovery and Tamper Detection Using Fragile Watermarking

Abstract

Fragile watermarking is one of the most effective approaches to insure the integrity of digital images. In this paper, an efficient self-recovery and tamper localization scheme using fragile watermarking is proposed. The proposed method generates 12-bit tamper detection data and 20-bit self-recovery data for each 4 $\times$ 4 block. The generated tamper detection and self-recovery features are encrypted by utilizing user secrete key. A random block mapping scheme is used to embed the encrypted block features into its mapping block. The proposed two-level tamper detection creates high capacity for tamper detection data which improves the security and tamper localization. The performance of the proposed scheme and its robustness against famous security attacks is analyzed. The experimental results demonstrate the high efficiency of the proposed scheme in terms of tamper detection rate, tamper localization and self-recovery. This method is robust against security attacks such as collage attack and constant average attack.