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http://dx.doi.org/10.3745/KIPSTC.2002.9C.1.001

A Digital Image Watermarking Scheme using ElGamal Function  

Lee, Jean-Ho (Dept.of Computer Sceince, Graduate School of Korea University)
Kim, Tai-Yun (Dept.of Computer Sceince, Korea University)
Publication Information
The KIPS Transactions:PartC / v.9C, no.1, 2002 , pp. 1-8 More about this Journal
Abstract
Digital image watermarking is a technique for the purpose of protecting the ownership of the image by embedding proprietary watermarks in a digital image. It is required for the digital image watermarking scheme to pursue the robustness against water marking attacks and the perceptual Invisibility more than usual in steganography area, to guarantee not a hidden watermarking algorithm but the publicity of water-marking algorithm details and hidden use of key, which can protect the unauthorized user access from detection. In this paper we propose a new copyright watermarking scheme, which is barred on one-way hash functions using ElGamal functions and modular operations. ElGamal functions are widely used in cryptographic systems. Our watermarking scheme is robust against LSB(least significant bit) attacks and gamma correction attack, and also perceptually invisible. We demonstrate the characteristics of our proposed watermarking scheme through experiments. It is necessary to proceed as the future work the algorithm of achieving at the same time both the pseudo-randomness for the steno-key generation and the asymmetric-key generation.
Keywords
Steganography; Digital Watermarking; One-way Hash function; ElGamal function;
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