Digital Watermarking and Steganography : Fundamentals and by Frank Y. Shih

By Frank Y. Shih

Advent electronic Watermarking electronic Steganography ameliorations among Watermarking and Steganography a short background Appendix: chosen checklist of Books on Watermarking and Steganography type in electronic Watermarking type in keeping with features type in response to functions Mathematical Preliminaries Least-Significant-Bit Substitution Discrete Fourier remodel (DFT) Discrete Cosine Read more...


deals scholars and researchers with mechanical information about electronic watermarking and steganography. This paintings offers them with the framework had to increase complex algorithms. It Read more...

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8(e). We observe that the neighboring pixels are now scattered everywhere around the image. 2 lists the coordinate change of each pixel using the chaotic map. 9(a) shows a Lena image of size 101 × 101. 13 with l = 2. Note that the resulting image is exactly the same as the original image after 17 iterations. 8 The pixel information in the first four iterations of the chaotic map. 9 An example of performing chaotic mapping on the Lena image. 7 Error Correction Code Error correction code (ECC) is another technology used to improve robustness in digital watermarking.

IEEE Int. Conf. on Image Processing. Lausanne, Switzerland: IEEE, 1996. [5] Lin, S. -F. Chen. ” IEEE Trans. Consumer Electronics 46 (2000): 415. , S. Voloshynovskiy, and T. Pun. ” Signal Processing 83 (2003): 2133. -F. Chang. ” In Proc. IEEE Int. Conf. on Image Processing. 2002. [8] Wong, P. W. ” In Proc. IEEE Int. Conf. Image Processing. Chicago, 1998. [9] Celik, M. , et al. ” IEEE Trans. Image Processing 11 (2002): 585. , and E. Delp. ” In Proc. Int. Conf. Imaging Science, Systems and Technology.

A digital signature replicates the handwritten signature and offers an even stronger degree of authentication. A user can sign a digital document by encrypting it with a private key and an encryption scheme. Digital signatures make use of a public key or asymmetric cryptography, in which two keys related to each other mathematically are used. One can verify the digital signatures using only the public key, but will need the secret key for the generation of digital signatures. Therefore, the public key is available to anyone who wishes to conduct verification, but the private key is merely given to authorized persons.

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