A novel matrix multiplication based LSB substitution mechanism for data security and authentication

Abstract

To enhance the conventional LSB technique of digital image watermarking, the paper introduces a novel approach of LSB technique based on matrix multiplication process. This technique selects the non-consecutive matrix of pixels to replace the last three bits of each RGB components of cover image by watermark image. The filtering process is applied on each block of matrix to select the suitable block for embedding process. Extraction process of watermark is just the reverse of the embedding process. The non-uniform substitution of bits makes the system more vigorous in terms of robustness, imperceptibility and security. Although the proposed method is non blind type of digital watermarking, the original image is required at destination side for the extraction process. MATLAB tool is used for the evaluation of the proposed system. The strength of the given methodology is highlighted by experimental results and tabulated for statistical attacks. This technique is suitable for content authentication and copyright protection applications.

Keywords

• Watermrk:LSB
• Matrix multiplication
• PSNR
• NCC