Cover selection steganography with intra-image scanning

摘要

Steganography deals with a concealing the secret message into any type of multimedia information, such as audio, video, images and text. There are several steganographic techniques, among which the cover selection method belongs to. Key point of the cover selection method is to find an optimal cover image from a cover image database. Optimal image is an image in which an embedding process causes minimum substitution changes. The goal of the proposed method is to scan all possible positions to secret message embedding in the cover image and to perform the same scanning for all cover images in the database. It brings much more comparative calculations. Thus, the method achieves better results in number of changes after an embedding process. On the other hand, main drawback is a worse time consumption. Such a method is called cover selection steganography with intra-image scanning.