Watermarking-Based Authentication with Recovery Mechanism

This paper studied the wavelet transformation based watermarking tamper detection and recovery scheme. By the property of discrete wavelet transform, we design two watermarks from the low-frequency band and embed the watermarks into the high-frequency bands. One watermark is used for detecting the intentional content modification and indicating the modified location, and another watermark is used for recovering the image. The watermark generation and watermark embedding are disposed in the image itself, and the received image authentication needs no information about the original image or watermark, so it will increase the security of watermark and prevent forged watermark. Experimental results show the algorithm guarantees a good classification for intentional content modification and incidental tampering, localization of content modification area and recovery of image.