Linguistic approach for text steganography through Indian text

摘要

Steganography is the art and science of hiding a message inside another message without drawing any suspicion to the others so that the message can only be detected by its intended recipient. With the other Steganography methods such as Image, Audio, Video, a number of text Steganography algorithms have been introduced. This paper presents a new linguistic approach for Steganography through Indian Languages by considering the flexible grammar structure of Indian Languages. To add more security to the system, instead of hiding the original message it is converted to an irrelevant binary stream by comparing the message bits with the pixel values of an Image. Thereafter, the bits of this binary stream are encoded to some part-of-speech and by creating meaningful sentences starting with a suitable word belonging to the mapped part-of-speech, the proposed method hides the message inside a cover file containing some innocuous sentences. Similarly in receiving side, the algorithm finds the corresponding part-of-speech of the starting word of each sentence and place the bit stream of the mapped part-of-speech to recover the converted message. After comparing these bits with the Image pixels, the algorithm extracted the original message from the cover file. The proposed method exhibits satisfactory result on some Indian Languages like Bengali.