Concealing-Restoring System for Analog Images

Our concealing-restoring system (CRS) is for the security of the data on the physical layer of the open-systems-interconnection reference model. CRS is primarily for the security of the digital data on that physical layer. It conceals the data by disturbance with some random noises, and moreover, it restores the concealed data by the noise elimination with the proper stochastic filtering. We have lately been studying CRS for analog signals. We introduce some types of mean errors and evaluate its ability in this study. Through the evaluation, we consider the application of CRS to the analog, pictorial image in this paper.