## Digital Image Marking by M-Sequences for the Aim of Secure E-Commerce

G. Karami and M. Amini Lari (Iran)

### Keywords

M-sequence, LFSR, watermarking, E-commerce, bit plane. 2. Linear Feedback Shift Register and m sequences Properties

### Abstract

3. A great number of different watermarks, all distinguishable from each other, can be inserted.In this paper we use the properties of m-sequences resulted from a linear feedback shift register(LFSR) as a good tool for logo encrypting for image watermarking. We actually use the properties of m-sequences as a 2-D random signals in order to manipulate digital image watermarking. Since the security of the method is important for us, We embed the resulted watermark by a simple method in the spatial domain. The resulted marked image can be used in the internet and the owner can reveal the mark by our method as a proof for its authority so ease the E-commerce applications. 4. The detection of the digital watermark through common image manipulations should be difficult [7]. The satisfaction of the above conditions provides a way to insert an invisible'' watermark on images. The watermark completely characterizes the person who inserted it and, as a result, proves the originality of the image. [11] introduced the Toral Automorphism'' method for watermark casting. In this paper we propose another spatial embedding watermark method which is assumed to be logo i.e. a black and white image with a small number of pixels. Our method, \emph{m sequence}, will be discussed in the next sections. \end{abstract}