Secure and Robust Image Watermarking using Discrete Wavelet and Arnold Transforms

Visual information transmitted over a network is prone to copyright violation or forgery. Therefore, authenticating and protecting sensitive information by embedding a digital watermark is one of the most effective ways of solving this problem. A watermark is normally embedded onto visual data for ownership identification and copyright protection. Thus far, its robustness against malicious attacks can be further strengthen. This paper thus proposes a double secure key in digital watermarking scheme, using Discrete Wavelet (DWT) and Arnold transforms. Unlike other existing wavelet-based watermarking, the proposed scheme used Arnold transform to switch embedding positions. The experimental results on embedding a binary watermark onto both binary and color images demonstrated that it was not only difficult to decrypt but also stronger against attacks, while maintaining the most information in the original content.