Image Authentication Subject Review
Keywords:Authentication, Identity, Transform domain.
Image authentication is the process of proving image identity and authenticity by embedding a secure data in the secure way called embedding process. In embedding, an algorithm is used to combine watermark (binary) and host data (original image), the watermark bits are embedded into the original data under transform domain or transform domain to produce the watermarked signal(data). To protect the authenticity of an image, several approaches have been proposed. Nowadays image authentication techniques have recently gained great attention due to its importance of multimedia applications.