A Comparison of Buyer-Seller Watermarking Protocol (BSWP) Based on Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT)

Buyer-Seller watermarking protocol (BSWT) is used to preserve the rights for the buyer and the seller. Frequency domain watermarking embedding that is DCT and DWT can affect the robustness and imperceptibility of watermarking algorithm. This paper studies the comparison of both domain which is DCT and DWT and concludes which one is better on the bases of some parameters. Digital watermarking is a key technology to embed information as unperceivable signals in digital contents. Buyer-seller watermarking protocols based on Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT) integrate digital watermarking algorithm and cryptography techniques for copyright protection. In this paper we have shown the comparison of these two, buyer-seller watermarking protocol based on Discrete Cosine Transform (DCT) and Discrete Wavelet Transform (DWT). These two protocols use Public Key Infrastructure (PKI), arbitrator and watermarking certificate authority (WCA) for better security. This paper shows results of watermark image quality based on peak signal-to-noise ratio (PSNR) mean square error (MSE) and similarity factor (SF).

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