一種基於矩陣編碼方式之資料藏匿演算法

An Improved Data Hiding Algorithm Based on the Method of Matrix Encoding

游昂勳(Ang-Hsun Yu)

指導教授 ： 黃育銘

國立暨南國際大學/科技學院/資訊工程學系/碩士(2012年)

https://doi.org/10.6837/NCNU.2012.00131

摘要

資料隱藏，顧名思義是一種加密的方法，把重要資訊隱藏到某一載體上，就像是將某秘密圖像藏入到一般圖像中而形成一張「偽裝圖像」，在正常情況下，人們的肉眼無法察覺到略為修改過後的偽裝圖像，也因此，對於資料隱藏的效能，通常以測量其失真度(distortion 或稱為均方誤差；mean square error）和 嵌入率（平均每個覆蓋像素上所鑲嵌的位元數目；embedding rate）來評估，在本文中，我們將使用漢明+1的想法，改善基於使用矩陣編碼方式的資料隱藏演算法，以提高隱藏圖像的品質，這個改進方案將通過理論分析以及實驗來驗證其正確性。

關鍵字

資料隱藏 ； 矩陣編碼 ； 漢明+1

並列摘要

The meaning of data (information) hiding is to embed the secret information into a cover host, such as an image. Usually, the naked eye of the people cannot perceive any change when the image is modified slightly. The evaluation of data hiding schemes should be measured by the distortion (or called Mean Square Error; MSE) and the embedding rate (the average number of bits embedded in a cover pixel).
In this paper, we propose an improved data hiding scheme which improves the matrix encoding-based data hiding algorithm by the idea of Hamming+1 to further enhance the stego-image quality. This proposed improved scheme is verified to be correct through the theoretical analysis and the experiment.

並列關鍵字

Data Hiding ； Matrix encoding ； Hamming+1

參考文獻

[1] A. Westfeld, “F5-a steganographic algorithm,” in Proc. of the 4th International Workshop on Information Hiding, Springer-Verkag, 2001, pp.289-302.

[2] C. C. Chang, T. D. Kieu, and Y. C. Chou, “A high payload steganographic scheme based on (7, 4) hamming code for digital images” in Proc. of international symposium on electronic commerce and security, 2008, pp.16-21.

[3] D. G.L Simmons, “The prisoners problem and subliminal channels,” in Proc. Annu. Int. Cryptology Conf., Santa Barbara, CA, 1984, pp. 51-67.

[4] F. M. J. Willems and M. van Dijk, “Capacity and codes for embedding in-

formation in gray-scale signals,” Inter. journal of IEEE Transactions on Information Theory, vol. 51, pp. 1209-1214, March 2005.