Localized lossless authentication watermark (LAW)

被引:21
作者
Celik, MU [1 ]
Sharma, G [1 ]
Tekalp, AM [1 ]
Saber, E [1 ]
机构
[1] Univ Rochester, Dept Elect & Comp Engn, Rochester, NY 14627 USA
来源
SECURITY AND WATERMARKING OF MULTIMEDIA CONTENTS V | 2003年 / 5020卷
关键词
lossless compression; tamper localization; reversible data embedding; invertible authentication;
D O I
10.1117/12.477312
中图分类号
TP [自动化技术、计算机技术];
学科分类号
0812 ;
摘要
A novel framework is proposed for lossless authentication watermarking of images which allows authentication and recovery of original images without any distortions. This overcomes a significant limitation of traditional authentication watermarks that irreversibly alter image data in the process of watermarking and authenticate the watermarked image rather than the original. In particular, authenticity is verified before full reconstruction of the original image, whose integrity is inferred from the reversibility of the watermarking procedure. This reduces computational requirements in situations when either the verification step fails or the zero-distortion reconstruction is not required. A particular instantiation of the framework is implemented using a hierarchical authentication scheme and the lossless generalized-LSB data embedding mechanism. The resulting algorithm, called localized lossless authentication watermark (LAW), can localize tampered regions of the image; has a low embedding distortion, which can be removed entirely if necessary; and supports public/private key authentication and recovery options. The effectiveness of the framework and the instantiation is demonstrated through examples.
引用
收藏
页码:689 / 698
页数:10
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