A secure and high capacity data hiding scheme for binary images

This paper proposes an effective data hiding scheme for a binary host image for the purpose of access control, authentication and copyright protection of digital media. The binary image is divided into blocks of size 2 x 2. These blocks are classified as embeddable or non-embeddable blocks according to their characteristic values, and a binary data sequence is embedded in those embeddable blocks by changing their characteristic values. The advantages of the method are low calculation, high embedding capacity, good security and maintaining high quality of the host image.