Localized lossless authentication watermark (LAW)

Mehmet U. Celik; Gaurav Sharma; A. Murat Tekalp; Eli S. Saber

doi:10.1117/12.477312

20 June 2003 Localized lossless authentication watermark (LAW)

Mehmet U. Celik, Gaurav Sharma, A. Murat Tekalp, Eli S. Saber

Proceedings Volume 5020, Security and Watermarking of Multimedia Contents V; (2003) https://doi.org/10.1117/12.477312
Event: Electronic Imaging 2003, 2003, Santa Clara, CA, United States

Abstract

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.

Citation Download Citation

Mehmet U. Celik, Gaurav Sharma, A. Murat Tekalp, and Eli S. Saber "Localized lossless authentication watermark (LAW)", Proc. SPIE 5020, Security and Watermarking of Multimedia Contents V, (20 June 2003); https://doi.org/10.1117/12.477312

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