Detection of Behavior Aging from Keystroke Dynamics

Keystroke dynamics-based authentication (KDA) is one of human behavioral-based authentication methods based on the unique typing rhythm of an individual. Nevertheless, the typing characteristics gradually change over time. Various solutions have been suggested to remedy the concept drift problem, including multimodal and unimodal adaptive methods. However, these solutions don't consider that temporal concept drift has a negative impact on performance and update frequency increases computation cost. The paper proposes weighted EDDM to detect concept drift and capture permanent concept drift (behavioral natural aging). Experimental results show that our method can accurately capture behavioral natural aging and filter temporal concept drift. Our proposed method has better performance and less computation.