A Sufficient Condition for Private Information Hiding of Two Correlated Sources Under Multiple Access Attacks
Yadong Wang, Yangfan Zhong, Fady Alajaji, Tamás Linder · 2007
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 Siinto 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 (in single-letter form) under which (S1, S2) can be successfully embedded into U under WY|X1X2is established.