Confidential processing method and device for image file

The invention discloses a confidential treatment method and device for an image file. The method comprises the following steps: acquiring an original picture; segmenting the original picture to form afragment file, wherein the fragment file comprises image fragments and coordinate information of the image fragments; and after the fragment file is transmitted, redrawing the fragment file by meansof the coordinate information of the image fragments to obtain a redrawn picture consistent with the original picture. According to the method, the picture is decomposed into the image fragments and the coordinate information of the image fragments according to the overall coordinates, then the fragment files and the coordinate information of the fragment files serve as the data streams to be transmitted, certainly, the data streams can also be encrypted, and due to the fact that the image fragments lacking the coordinate information cannot be restored substantially, the image fragments cannotbe restored. therefore, th