Information Hiding Algorithm Based on Transformation and Image Partition

Payload and imperceptibility are two important features of the information hiding system, but how to taken care of these two features is the challenge to researchers. In this paper, a new method of information hiding is proposed about visual effects and safety .It doesn´t transform the information at first. Transforming the image into cover by traditional Arnold transformation, and the cover is divided into non-overlapping 3 × 3 image block, the secret information is successfully embedded in it under the certain key, with Arnold scrambling to restore images containing confidential at last. To compare with test results, the secret images of this algorithm is not only higher peak signal, but also anti-shearing and a reliable security guarantee.