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Hybrid Asymmetric Watermarking using Correlation and Critical Criteria  

Li De (상명대학교 디지털저작권보호연구센터)
Kim Jong-Weon (상명대학교 디지털저작권보호연구센터)
Choi Jong-Uk (상명대학교 소프트웨어대학)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.7C, 2005 , pp. 726-734 More about this Journal
Abstract
Traditional watermarking technologies are symmetric method which embedding and detection keys are the same. Although the symmetric watermarking method is easy to detect the watermark, this method has weakness against to malicious attacks remove or modify the watermark information when the symmetric key is disclosure. Recently, the asymmetric watermarking method that has different keys to embed and detect is watched by several researchers as a next generation watermarking technology. In this paper, hybrid asymmetric watermarking algorithm is proposed. This algorithm is composed of correlation detection method and critical criteria method. Each method can be individually used to detect watermark from a watermarked content. Hybrid asymmetric detection is complement between two methods, and more feasible than when each method is used respectively, Private key and public key are generated by secure linear transformation and specific matrix. As a result, we have proved the proposed algorithm is secured than symmetric watermarking algorithms. This algorithm can expand to multi bits embedding watermark system and is robust to JPEG and JPEG2000 compression.
Keywords
correlation detection; critical criteria; hybrid detection; public key; asymmetric;
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