![]() ![]() Experimental results for OutGuess 0.13b, OutGuess 0.2 and modified F5 steganography show that the proposed method can successfully recover the stego key and that its performance is superior to that of existing methods.Ĭhen JY, Liu JF, Zhang WM et al (2013) Cryptographic secrecy analysis of matrix embedding. Finally, based on the difference in the distributions of zero and non-zero coefficients between the correct and incorrect paths, a method of recovering the stego key for F5 steganography (modified version) using this model is proposed. ![]() Secondly, based on the difference in the distributions of odd and even coefficients between the correct and incorrect paths, a method of recovering the stego key for OutGuess steganography using this model is proposed. Moreover, formulas are given for calculating the desired sample size and threshold in the proposed stego key recovery model. Firstly, based on the differences in the statistical properties of the discrete cosine transform (DCT) coefficients between the paths generated by the correct and incorrect keys, a stego key recovery model based on the optimal hypothesis test is proposed. This paper mainly studies methods of recovering the stego key for least significant bit (LSB) steganography in the JPEG domain. For steganography using a stego key, the purpose of an extraction attack is to recover the stego key. However, the extraction of hidden messages, i.e., extraction attacks, also plays a decisive role in tasks such as obtaining evidence of covert communication and fighting against criminal activities. At present, research on steganalysis is mainly focused on the existence detection of hidden messages. ![]()
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