databases Digital watermarking for relational databases has emerged as a candidate solution to provide copyright protection, tamper detection, traitor tracing, and maintaining integrity of relational data. Many watermarking techniques have been proposed in the literature to address these purposes. A survey of the current state-of-the-art and a classification of the different techniques according to their intent, the way they express the watermark, the cover type, granularity level, and verifiability was published in 2010 by Halder et al. in the Journal of Universal Computer Science. See also Coded Anti-Piracy Copy attack EURion constellation Pattern Recognition (novel) Steganography Traitor tracing Watermark (data file) Audio watermark Digital on-screen graphic Automatic content recognition References Further reading ECRYPT report: Audio Benchmarking Tools and Steganalysis ECRYPT report: Watermarking Benchmarking Jana Dittmann, David Megias, Andreas Lang, Jordi Herrera-Joancomarti; Theoretical framework for a practical evaluation and comparison of audio watermarking schemes in the triangle of robustness, transparency and capacity; In: Transaction on Data Hiding and Multimedia Security I; Springer LNCS 4300; Editor Yun Q. Shi; pp. 1–40; ,2006 PDF Patrick Bas, Teddy Furon, François Cayre, Gwenaël Doërr, Benjamin Mathon, "Watermarking Security, Fundamentals, Secure Designs and Attacks", Springer Briefs in Electrical and Computer Engineering, 2016, External links Authentication methods Watermarking Digital photography