1. Multiple Layer Reversible Images Watermarking Using Enhancement of Difference Expansion Techniques;Abdullah,2010
2. An improved Quad and RDE-based medical data hiding method;Ahmad,2013
3. Reversible watermark using the difference expansion of a generalized integer transform;Alattar;IEEE Trans. Image Process.,2004
4. Reversible watermark using difference expansion of quads;Alattar,2004
5. 2-Leyer security system for hiding sensitive text data on personal computers;Al-otaibi,2014