A Secure Watermarking and Tempering Detection Technique Using 2 Level DWT

Abstract

Digital Watermarking is a vital field for copyrights of a variety of electronic documents and media. Mostly easy to get to on the Internet with images, it can occasionally be attractive to apply copyrights. Digital watermarking is a method of combining data into a digital signal. In digital watermarking we work on two images one is for watermark image, which is overlie on the original image (secondary image) that gives security to the image. It acts as a digital mark, providing the image a good judgment of ownership or authenticity. Digital watermarking method is very inspiring for image authentication or security for attacks. This paper present a review on digital watermarking their classification, application, techniques, attacks and also tampering detection in digital watermarking. We proposed a new algorithm for digital watermarking and tampering detection technique, by combing these techniques, we can improve the security of image.