Abstract: In thispaper an invisible robust image watermarking scheme based on pseudo random numbers with various attacks is proposed.This algorithm works on spatial domain. In this paper cover image partitioned into 3*3 blocks and random blocks are chosen for the watermark embedding. Watermark is pseudo random binary sequence and protected by the secrete key. At the receiver effectiveness is checked by the correlation between sender data and received data. This paper comprises various attacks such as noise attack, low pass filtering attack, median filtering attack on the watermarked image for checking robustness of the scheme.

Keywords: Watermarking, Robust, Pseudo random, invisible.