The issue of protecting scientific and intellectual
products and publications ownership constitutes an important
deal within the domain of securing and protecting information.
Digital watermarking is used to identify the ownership of the
copyright and in authentication process. In this paper, an
invisible blind watermarking method utilizing the word space
in Arabic text is proposed. Since the pseudo-space is very small
space used to separate two parts of the same word, it is
inserted before normal space and after pointed letter to hold
the binary bit 'one', and it is inserted before normal space and
after un-pointed letter to hold binary bit 'zero'. The
comparative results obtained by testing our proposed method
with some of existing Arabic watermarking methods using four
variable size text samples. The results show that our method
has a higher capacity ratio and imperceptibility than other
watermarking techniques