Continuous Speaker Authentication when Using Network Administrator Virtual Assistant

In this paper we introduce the continuous authentication system for voice‑controlled network administrator virtual assistant. While voice control is a promising technology in such fields as Internet of Things, smart home systems and voice assistant applications, the voice transmission channel is vulnerable to a number of threats which bypass the standard technique of one‑time authentication. The efficiency of the proposed system is achieved by analyzing the physical characteristics of inbound speech signal in a form of mel‑frequency cepstral coefficients and hierarchically distinguishing the voice commands according to their possible negative impact on information security state. The considered continuous authentication system can be deployed in a local environment on a low‑performance device while maintaining acceptable accuracy rates.