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We consider a public multi-user information embedding (watermarking) system in which two messages (watermarks) are independently embedded into two correlated covertexts and are transmitted through a multiple-access attack channel. The tradeoff between the achievable embedding rates and the average distortions for the two embedders is studied. For given distortion levels, inner and outer bounds for...
We study joint quantization and watermarking of a memoryless Gaussian source under memoryless additive Gaussian attacks in a private scenario. The achievable region involving the quantization and the watermarking rate pairs has been established by Karakos and Papamarcou (2003). In this paper, we refine the analysis of the watermarking decoding error probability for given achievable rate pairs by deriving...
Consider a multi-user private information-hiding scenario in which two information hiders separately embed correlated sources (S1, S2) into a common host source U (covertext). The i-th information hider embeds the secret source Si into the covertext U subject to a distortion constraint Di (i = 1, 2). The outputs (stegotexts) are corrupted by a multiple access channel attack WY|X1X2. A sufficient condition...
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