Ensemble Steganography

摘要

Currently, selection-channel-aware (SCA) steganalysis is the most successful technique for detecting steganography. It estimates the modification probabilities to improve its performance. How to counter SCA steganalysis is one of the most challenging works in steganography. In this paper, we propose ensemble steganography which introduces random cost functions to disturb the estimation of the modification probabilities of cover elements. The experimental results imply that ensemble steganography improves the performance of HILL and UNIWARD in countering SCA steganalysis and the security of ensemble steganography increases with the number of cost functions and the differences among them.