Proposing a security steganographic model which do not carry secret information based on digital image scaling.The secret information was deduced by using image scaling algorithm

rather than directly embedded in the carrier image.Firstly

selected the carrier image

zoomed it to a certain multiple through the appropriate algorithm

then found out the relevance of the pixel information between secret image and a new image

finally reduced to the original image size for transmission.Since the scheme did not directly modify the image content

the hidden performance was better.Experiments show that the method is simple

computation is safe

and embedded information is convenient to be extracted

meeting the non-detection of hidden information and adapting to image concealed communication.