Simulation of the Active Protection Device in the Acoustoelectric Leakage Channel

One of the technical channels for information leakage is the acoustoelectric channel. The article designed a telephone protection device over an analog communication line. The protection device implements two protection methods: active and passive. The passive protection method includes the design of the diode bridge and the low-pass filters. The active protection method includes the design of the noise generator. The device protects the telephone from high-frequency injection and leakage of small-amplitude signals. These methods were investigated in a simulation environment National Instruments Multisim in all operating modes.