A wavelet-based fragile watermarking scheme for secure image authentication

Abstract

This paper proposes a wavelet-based fragile watermarking scheme for secure image authentication. In the proposed scheme, the embedded watermark is generated using the discrete wavelet transform (DWT), and then the improved security watermark by scrambling encryption is embedded into the least significant bit (LSB) of the host image. The proposed algorithm not only possesses excellent tamper localization properties and greater security against many attacks, but also demonstrates a new useful feature that can indicate whether the modification made to the image is on the contents or the embedded watermark. If only the watermark is modified, the authenticity of the image is assured, instead of being declared as a counterfeit. Experimental results illustrate the effectiveness of our method. © Springer-Verlag Berlin Heidelberg 2006.