Text Steganography System Using Markov Chain Source Model and DES Algorithm

High transmission efficiency, low resource occupancy and intelligible meaning make text message as the most commonly used type of media in our daily communication. Text steganography, an information hiding technology based on text message, has been a new exploring research in recent years. Due to the restriction of redundant information as well as its alterability in manual operation, text message is difficult to hide secret information effectively and reliably. Based on Markov Chain source model and DES algorithm, this paper presents a text steganography system for spelling languages. It can work reliably with the capability of immunity from regular operations, such as formatting, compressing and sometimes manual altering operation in text size, front, color and the space between words. By adopting the technique of heuristic composition, this system can produce cover text close to nature language. It’s suitable for hiding short information in online communication, such as E-mail, MSN Messenger, QQ, instant conversation and the short message on mobile phone.