Journal
COMPUTERS & ELECTRICAL ENGINEERING
Volume 67, Issue -, Pages 320-329Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compeleceng.2017.08.020
Keywords
Medical JPEG image; Image steganography; DCT Coefficients; Inter-block dependencies
Categories
Funding
- National Natural Science Foundation of China [61402162, 61572182, 61370225, 61472131, 61272546, 61300220]
- Scientific Research Fund of Hunan Provincial Education Department [16B089]
- Hunan Provincial Natural Science Foundation of China [2017JJ3040]
- Opening Project of Shanghai Key Laboratory of Integrated Administration Technologies for Information Security [AGK201605]
- CCF-Venustech Research Fund
- Science and Technology Key Projects of Hunan Province [2015TP1004, 20161C2012]
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With the development of computer and biomedical technologies, medical JPEG images contain the patients' personal information and the security of the private information attracts great attention. Steganography is utilized to conceal the private information, so as to provide privacy protection of medical images. Most of existing JPEG steganographic schemes embed messages by modifying discrete cosine transform (DCT) coefficients, but the dependencies among DCT coefficients would be disrupted. In this paper, we propose a new medical JPEG image steganographic scheme based on the dependencies of inter-block coefficients. The basic strategy is to preserve the differences among DCT coefficients at the same position in adjacent DCT blocks as much as possible. The cost values are allocated dynamically according to the modifications of inter-block neighbors in the embedding process. Experimental results show that the proposed scheme can cluster the inter-block embedding changes and perform better than the state-of-the-art steganographic method. (C) 2017 Elsevier Ltd. All rights reserved.
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