Digital watermarking protocol based on El Gamal algorithm
Yan Li-xi · Journal of Computer Applications · 2013
In light of the drawbacks of current digital watermarking protocols, such as requiring frequent involvement of buyers, assuming that buyers' knowledge of signature or watermark, and not considering appropriate usage control of digital products, a secure, practical and extensible watermarking protocol was proposed, by utilizing the homomorphic, commutative El Gamal encryption algorithm and the machine fingerprint-based copyright control scheme. Besides the basic functions of the digital watermarking protocol, this protocol also considered the interests of both buyer and seller to some extent, and improved user's experience with a transaction model similar to the traditional one.