In order to enhance the security and uncertainty of the image authentication system and effectively prevent collusion attack, a semi-fragile watermarking algorithm based on singular value decomposition (SVD) is proposed. In this algorithm, watermark images are encrypted by secure Hash function based on message-digest algorithm 5(MD5). Experiments demonstrate that the proposed scheme is highly sensitive to the distortion of the images and resistible to common image processings, such as median filtering, JPEG...
| 
推荐 
点击下列相关研究机构和相关文献作者，可以直接查到这些机构和作者被《中国知识资源总库》收录的其它文献，使您全面了解该机构和该作者的研究动态和历史。
