Study of Information Hiding Based on RS Code in Noise Channel Technology
Tianyu Wang · Journal of Information Engineering University · 2004
This paper proposes a kind of algorithm on information hiding based on RS code in noise channel.The algorithm regards stegomessage as channel noise and embeds it in RS code.The paper discusses the optimal embedded position and the maximal embedded stegomessage ratio for one code word.First we detect the channel bit error rate and which type the channel noise belongs to.If the channel noise is stochastic error,we should use channel code with powerful ability to correct stochastic error and embedded the stegomessage in carrier data dispersedly.Otherwise we choose code with powerful ability to correct burst errors and embedded the stegomessage continuously.We can calculate the maximal embedded stegomessage ratio when the channel bit error rate is given.This hiding process has no effect on the decoding data of the secret object only if the total number of embedded data and channel noise in one code word is within the bound of error correcting capability.The experiment shows that this algorithm has better robustness and imperceptibility when the embedded stegomessage ratio is smaller than some number.