A Data Hiding Scheme on Word Documents Using Multiple-Base Notation System

A novel data hiding scheme in the word document files are to be proposed. There are two basic concepts in our approach. First of all, let the spaces of each line, which the number of spaces is more than one of cover files embeds secret messages. In the past, the data hiding schemes on document files usually used a pair or block of inter-word spaces to embed secret messages. Comparatively, our scheme can decrease the time of modifying spaces. Secondly, the multiple-base notational system is to be used. We let the number of spaces of lines be the base of the multiple-base notation system because of the cover files that are in the text format, as long as the file size is not large and the calculating cost is kept low. The proposed scheme is efficient and easy, the capacity is more than other schemes, and the time of the modifying spaces is less as well. It will be appropriate for data hiding in the word document files.