Zero-Distortion Authentication Watermarking

This paper proposes a zero-distortion authentication watermarking to produces a watermarked signal. With the same decoder, the watermarked signal has the same quality as the original one. To this end, the scheme replaces the original signal with its equivalence so as to embed authentication message. We employ this concept to authenticate palette images by regulating the palette. Because the visual appearance of the watermarked image is not modified, there is no need to reconstruct the original image at all. We also employ the idea to provide the software integrity protection by re-arranging the software instructions or modules to embed the authentication message. Because the software control flow and data flow remain unchanged,the watermarked software is equivalent to the original software. The instruction sequences of watermarked software represent the authentication message which can be used for verification.