The capacity of arithmetic compression based text steganography method

Abstract

Application of the lossless compression method to hide texts is considered as a novel trend in research projects. Evaluation of the proposed methods in the field of steganography reflects a variety of approaches to create covert communication via text files. The extensiveness of steganographic issues and the presence of a huge variety of approaches make it difficult to precisely compare and evaluate these methods. Therefore, in this article a new steganography method that uses a statistical compression technique called `arithmetic coding', will be presented. In addition, the comparison of this method capacity with other methods will be explained. The arithmetic coding technique that has very high compression rates, shall guarantee even a higher growth capacity and higher security compared to its similar techniques. Meanwhile, the secret messages were not revealed through rewriting or syntax/semantic checking and compared with similar methods, increased the capacity by up to 68.9%, and compared with other methods; this method improved the capacity of fifteen times.