結合最低有效位元藏入法及改良式像素值差異藏入法的資訊隱藏方法

Hybrid Data Hiding Scheme Based on Least Significant Bit and Pixel Value Differencing

劉信甫(HSIN-FU LIU)

指導教授 ： 曾顯文

朝陽科技大學/資訊學院/資訊管理系/碩士(2016年)

摘要

本研究提出結合Least-Significant-Bit(LSB)和改良式Pixel-Value Differencing(PVD)藏入法的資訊隱藏方法。首先將原始影像分成5×5不重疊的區塊，並選擇中央的像素作為基礎像素；然後將區塊內其它像素分成相對於基礎像素的內層像素及外層像素。根據基礎像素與內外層像素之間的距離作為分類的依據，分別針對內層像素與外層像素使用LSB或改良式PVD藏入法，藏入法取決於藏入機密訊息後選擇均方差較小的進行藏入，實驗結果顯示本研究方法能夠在高藏入量的情況下同時保有良好的偽裝影像品質。

關鍵字

LSB藏入法 ； 改良式PVD藏入法 ； 資訊隱藏

並列摘要

This paper presents a data-hiding method based on least-significant-bit (LSB) substitution and an improved Pixel-Value Differencing (PVD) method for grayscale images. The proposed method partitions the cover image into 5×5 non-overlapping blocks. For each block, selects the central pixel as the base pixel and the other pixels in this block are classified into inner-layer and outer-layer. Then, the secret message is embedded into the inner-layer and outer-layer that which method makes this block has minimum Mean Squared Error. The experimental results show that the proposed method can embed a large amount of secret message into the cover image and keeping good stego image quality.

並列關鍵字

Least-Significant-Bit (LSB) Substitution ； Improved Pixel-Value Differencing (PVD) Method ； Data Hiding

參考文獻

[11] Y.Y. Tsai, J.T. Chen, and C.S. Chan(2014), “Exploring LSB Substitution and Pixel-value Differencing for Block-based Adaptive Data Hiding,” International Journal of Network Security, Vol. 16, pp. 363-368.

[4] C.K. Chan and L.M. Cheng(2004), “Hiding Data in Images by Simple LSB Substitution,” Pattern Recognition, Vol. 37, No. 3, pp. 469-474.

[5] C.C. Chang and H.W. Tseng(2004), “A Steganographic Method for Digital Images Using Side-match,” Pattern Recognition Letters, Vol. 25, No. 12, pp. 1431-1437.

[6] J. Fridrich, M. Goljan, and R. Du(2001), “Reliable detection of LSB steganography in color and grayscale images,” Proc. ACM Workshop, Multimedia and Security, pp. 27-30.

[7] A.K. Gulve and M.S. Joshi(2015), “A High Capacity Secured Image Steganography Method with Five Pixel Pair Differencing and LSB Substitution,” International Journal of Image, Graphics and Signal Processing, Vol. 5, pp. 66-74.