Implementation of Steganography Using LSB Replacement and Number Theory

應用LSB取代法與數論於藏密學之實作

葉亘芙(Hsuen-Fu Yeh)

指導教授 ： 陳朝欽

國立清華大學/電機資訊學院/資訊系統與應用研究所/碩士(2011年)

https://doi.org/10.6843/NTHU.2011.00109

摘要

This thesis implements a steganographic method which encrypts the secret message by exponential and modular operations before hiding data to improve the security. For the cover image, we also do an affine transform based on the locations of pixels before embedding the bits. The secret message encryption is a sequence of bits obtained from shuffling the bits of the secret message according to the concept of an exponential and modular arithmetic. We first select a prime number p and convert a secret message into many sets of a bit sequence S[i], 1 S[i]

關鍵字

藏密

並列摘要

無資料

並列關鍵字

LSB replacement ； number theory ； primitive root ； steganography

參考文獻

[Chan2004] C.K. Chan and L.M. Cheng, "Hiding data in images by simple LSB substitution", Pattern Recognition Letters, vol. 37, no. 3, 469–474, 2004.

[Mede2011] Medeni, M.B.O., Souidi, E.-M., "A novel steganographic method for gray-level images with four-pixel differencing and LSB substitution ", IEEE Multimedia Computing and Systems (ICMCS), 2011 International Conference on, 1-4, 2011.

[Miel2006] J. Mielikainen, "LSB matching revisited", IEEE Signal Processing Letters, vol. 13, no. 5, 285-287, 2006.

[Sabe2007] A. Sabeti, S. Samavi, and M. Mahdavi, "Steganalysis of Pixel-Value Differencing Steganographic Method", IEEE Pacific Rim Communications, Computers and Signal Processing, 292-295, 2007.

[Trap2006] W. Trappe and L.C. Washington, Introduction to Cryptography with Coding Theory, Pearson International Edition (2006).