Data security has become a major concern of present time. Digital image watermarking is seen as a viable solution to ensure the integrity of image data. Watermarking algorithms can detect the presence of various attacks on images. In this work, a secure and efficient fragile image watermarking technique is proposed. The proposed watermarking algorithm aims to find image tampering and its location. The proposed approch is a spatial domain, block-based embedding technique. It introduces a unique key based embedding using SHA-1 (Secure Hashing Algorithm) hashing. The watermarked images have high PSNR and SSIM. The algorithm can handle various size of tampering, from very small to large. The proposed technique has been tested for a wide variety of tampering attacks like copy-paste, copy-move, constant average, and general tampering. It can efficiently detect tampering in the presence of these attacks.

数据安全性已经成为当前的主要关注点。数字图像水印被视为确保图像数据完整性的可行解决方案。水印算法可以检测图像上各种攻击的存在。在这项工作中，提出了一种安全有效的脆弱图像水印技术。提出的水印算法旨在找到图像篡改及其位置。提出的方法是一种基于域的基于块的嵌入技术。它引入了使用SHA-1（安全哈希算法）哈希的唯一基于密钥的嵌入。带水印的图像具有较高的PSNR和SSIM。该算法可以处理从很小到很大的各种大小的篡改。已针对多种篡改攻击（如复制粘贴，复制移动，恒定平均值和常规篡改）测试了所提出的技术。