Wireless steganography using MIMO system

As a countermeasure against eavesdropping in wireless communications the wireless steganography technique has been proposed and the fundamental performance of the technique was evaluated. In this paper, we propose a new wireless steganography using Multiple-Input Multiple-Output (MIMO) system. By computer simulations we evaluate the performance of the proposed system such as the transmission characteristics of the cover signal and the embedded signal between authorized stations, and the anti-steganalysis performance against eavesdroppers. As the result, the wireless steganography using MIMO system is found superior to that using Single-Input Single-Output (SISO) system in terms of transmission characteristics between authorized stations and the tapping resistance to the steganalysis by eavesdroppers.