Publication Type : Book Chapter
Publisher : Techniques and Applications for Advanced Information Privacy and Security: Emerging Organizational, Ethical, and Human Issues
Campus : Coimbatore
School : School of Engineering
Department : Computer Science
Year : 2009
Abstract : This chapter discusses a content-based authentication technique based on inter-coefficient relationship of Discrete Wavelet Transform (DWT). Watermark is generated from the first level DWT. An image digest (which is a binary string) is generated from the second level DWT. The watermark is embedded in the mid-frequency coefficients of first level DWT as directed by the image digest. Image authentication is done by computing the Completeness of Signature. The proposed scheme is capable of withstanding incidental image processing operations such as compression and identifies any malicious tampering done on the host image. © 2009, IGI Global.