Digital Documents Integrity Protection Using Invisible Changeable Watermark

초록

One of the strategies used to secure the integrity of digital documents is invisible watermarking. In this research, a secure invisible image watermarking technique is developed to identify any changes or tampering within the document's content. The suggested watermark has the benefit of being based on the document's content rather than putting one image into another. The proposed watermark is changeable and determined by the word order of the text and the number of letters in each word. The proposed approach is divided into three steps. In the beginning, the document's image is converted into text using Optical Character Recognition (OCR). The second step is the mapping of the letters of the text using the American Standard Code for Information Interchange (ASCI) II. Finally, the watermark bit is hidden using a recommended watermark embedding procedure in each pixel's least significant bit (LSB). The main target of the traditional algorithms is how to extract the watermarked image from the original one. The proposed watermark identifies the position of any deliberations and preserves the watermark and the information at the same time. A JPG image is used to evaluate the suggested algorithm and the findings demonstrate that the proposed algorithm has a strong capacity to retain the content of the document and to identify any modifications. The code takes 1.5 seconds to test if the document has been tampered with. The Structural Similarity Index (SSIM) is 0.99998, the Peak Signal Noise Ratio (PSNR) is 69.149, the Mean Absolute Error (MAE) is 0.0028, the Universal Image Quality Index (UIQI) is 0.99998, and the Mean Square Error (MSE) is 0.00791.

키워드