Study of Chinese Text Steganography using Typos

Nowadays, with the Information Explosion and the rapid development of information technology, huge amounts of data are constantly being generated every day on the Internet. But most of the texts provided online is of a kind that usually contain many typos, which is very common among individual users, self-media, etc. However, disambiguation is human's talent, so these typos often do not frustrate human understanding the text, and sometimes it is even difficult to recognize some typos. This phenomenon appears both in English and Chinese, so it seems to be cross-lingual. Therefore, in such texts, it is not surprising that one can perform information-hiding by judiciously injecting typos. We studied Chinese typos in the text contents on Weibo or WeChat, and propose a text steganography method based on Chinese typos with the help of NLP, which can embed secret information by carefully injected typos and guarantee the security of the secret and the readability of the texts. Unlike format-based steganography algorithms, our algorithm can resist format adjustments, OCR re-inputs, etc. Furthermore, Weibo and WeChat platform contain many kinds of media, so by combining other algorithms, Cross-Media or even Cross-Social Network information hiding is practical.