List of Articles robustness Open Access Article Abstract Page Full-Text 1 - Providing an Image Watermarking Scheme Based on Chaotic Sequence and Cosine Transform, to Strengthen Interaction with a Variety of Software Attacks Mostafa Boroumandzadeh Open Access Article Abstract Page Full-Text 2 - A Modified Digital Image Watermarking Scheme Basedon Nonnegative Matrix Factorization