Stego key estimation algorithm in spatial sequential image steganography
空域序列隐写图像的密钥估计算法*

This paper focused on the problem of estimating the stego key, which could be considered as the beginning of the secret message under the condition that the message length was known. Classified the pixels into different kinds. Based on the analysis of the effects on different kinds of pixels message embedding and least significant bit plane flipping have, obtained the difference between the part with message and the part without message in image. And then devised the stego key estimation algorithm of spatial sequential LSB image steganography. The experiment shows that this algorithm can estimate the stego key effectively and quickly.