Distributed Block-Dependent Watermarking Method for JPEG2000 Image Authentication

Two essential benefits, the resistance to the counterfeiting attack and the tamper localization accuracy, of the fragile watermarking methods are mutually restricted. In this paper, a novel distributed block-dependent watermarking method is proposed to gain both benefits by inserting the block watermark into other chosen blocks. Further, the proposed method can be easily implemented in the DWT domain for authenticating JPEG2000 images. Experimental results show that the method can resist the counterfeiting attack effectively as other block-dependent watermarking methods, while sustain the high localization accuracy as the block-independent watermarking method. It is also demonstrated that the proposed method can successfully authenticate the JPEG2000 images while recognize the malicious tampers, such as crop-and-replacement, deletion, and so on.