SMS Blind Steganography by Using Maximum-Minimum Method
Abouzar Zare · Journal of Electrical Engineering, Electronics, Control and Computer Science · 2018
This paper represents an effective steganography method for the textual data in black and white images used in the pictorial short message service (SMS). Practically, compare with other methods, the steganography capacity increases substantially by changing the selection methodology and the style of blocking as well as the way of storing characters. In order to have bit changes in a block of the cover image, such that the change would not be noticeable by an observer (to be imperceptible), maximum of one-bit change per block is allowed. The introduced maximum-minimum method is based how the required pixel value, which is assumed to be located in the center of the block, is related to the number of the black or white pixels in that block. In fact, only the center pixel value maybe changed in a block. The hidden secret message may be recovered with examining a pixel with its related block; and so, there is no need to have the original image. By comparing it with other methods, our new method offers higher capacity, more efficient imperceptibility, and better security features.