Sequential Multiple Signature Scheme Based on Wavelet Domain Digital Watermarking

Abstract

With wavelet transform multiresolution characteristics, using wavelet domain digital watermarking algorithm, we embed signed information in in the intermediate frequency subband picture which is processed by three level wavelet decomposition. Signed information not only have a good invisibility and robustness, but also enhance security. The practice shows that the scheme can effectively hide signature information in the seal picture, if attacked, the receiver can discriminate from seal image, and has better safety.