@inproceedings{1cd8095d8c1848c1856e2084371752e8,
title = "An image copyright protection scheme based on torus automorphism",
abstract = "We propose an approach to protect the copyright of image data. Many watermarking techniques have been proposed to guard the copyright of image data, most of which need to embed the watermark in the cover image. Unfortunately, embedding always results in a reduction of image quality. To achieve the goal of copyright protection without reducing image quality, we incorporate the concept of digital signature into our approach. Firstly, we produce a signature in correspondence with the cover image and the watermark. We send this signature to a certification authority or a trusted third party. If anyone pirates our image, we can still retrieve the watermark image with the signature that was stored at the certification authority and prove that the image is ours. The watermark image that we use is a gray-level image.",
author = "Chang, {Chin Chen} and Hsiao, {Ju Yuan} and Chiang, {Chi Lung}",
year = "2002",
month = jan,
day = "1",
doi = "10.1109/CW.2002.1180882",
language = "English",
series = "Proceedings - 1st International Symposium on Cyber Worlds, CW 2002",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "217--224",
editor = "Shietung Peng and Shuichi Yukita and Savchenko, {Vladimir V.}",
booktitle = "Proceedings - 1st International Symposium on Cyber Worlds, CW 2002",
address = "United States",
note = "1st International Symposium on Cyber Worlds, CW 2002 ; Conference date: 06-11-2002 Through 08-11-2002",
}