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Privacy aware reversible watermarking in cloud computing environments

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Academic year: 2020

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Figure

FIGURE 1. The proposed watermarking protocol. A transmitter Alice wants to protect a signal through embedding a watermark, which can be fulfilled by a cloudservice provider Charlie
FIGURE 2. Watermarking procedures for a selected symbol. Let x be a host symbol and w be a watermark symbol
FIGURE 3. Watermarking as noise adding. Alice demultiplexes and encrypts the host signal into encrypted components and then sends each component overeither a noiseless or noisy channel
FIGURE 4. A given pixelu uO and its correlated neighbouring pixels uN, uS,W , uE, uNW , uNE, uSW and uSE.
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