On Security Level of Some Secret Keys of Concealing - Restoring System Aimed to BCI/BMI Security

We study the concealing-restoring system (CRS) for analog signals. CRS conceals any analog signal using some random-noise disturbances, and splits it into some concealed signals. CRS restores the signal from those concealed signals using a proper noise filtering. In this paper, a kind of security level of CRS is briefly reported. CRS has several secret keys; a tendency of the security level is investigated for some of them through the several numerical experiments.