  Artificial Intelligence (AI) has found its applications in a variety of
environments ranging from data science to cybersecurity. AI helps break through
the limitations of traditional algorithms and provides more efficient and
flexible methods for solving problems. In this paper, we focus on the
applications of artificial intelligence in authentication, which is used in a
wide range of scenarios including facial recognition to access buildings,
keystroke dynamics to unlock smartphones. With the emerging AI-assisted
authentication schemes, our comprehensive survey provides an overall
understanding on a high level, which paves the way for future research in this
area. In contrast to other relevant surveys, our research is the first of its
kind to focus on the roles of AI in authentication.
