Embedding Secret Messages Using Modified Huffman Coding

This paper demonstrates an effective lossless data hiding scheme using modified Huffman coding. The binary secret message is concurrently embedded and encoded with a cover medium such as a video file, an audio file, or even a text file. The proposed scheme not only provides good data hiding capacity and data recovery capability, but also being efficient in space saving (the stego medium is much smaller than the cover medium). Each symbol in a cover medium can carry one secret bit, and the cover medium can be reversed. And the experimental results show that the stego code can saves 30% to 35% of space compared with the cover medium.