期刊
IEEE TRANSACTIONS ON INFORMATION FORENSICS AND SECURITY
卷 9, 期 8, 页码 1264-1277出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TIFS.2014.2326954
关键词
Cost-value distribution; distortion function; priority profile; steganalysis; steganography
资金
- 973 Program [2011CB302204]
- National Science Foundation of China [61103174, U1135001, 61332012]
- Foundation for Distinguished Young Talents in Higher Education of Guangdong [2012LYM0117]
- Fundamental Research Program of Shenzhen [JCYJ20120613113535357, JCYJ20120613115442060]
Relating the embedding cost in a distortion function to statistical detectability is an open vital problem in modern steganography. In this paper, we take one step forward by formulating the process of cost assignment into two phases: 1) determining a priority profile and 2) specifying a cost-value distribution. We analytically show that the cost-value distribution determines the change rate of cover elements. Furthermore, when the cost-values are specified to follow a uniform distribution, the change rate has a linear relation with the payload, which is a rare property for content-adaptive steganography. In addition, we propose some rules for ranking the priority profile for spatial images. Following such rules, we propose a five-step cost assignment scheme. Previous steganographic schemes, such as HUGO, WOW, S-UNIWARD, and MG, can be integrated into our scheme. Experimental results demonstrate that the proposed scheme is capable of better resisting steganalysis equipped with high-dimensional rich model features.
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