I. Introduction
Face recognition is one of the most famous research in computer science. This research field has been studied over the years and the accuracy has improved over the years [1]–[3]. However, a new challenge emerges when a pandemic caused by COVID-19 emerges and forces people to wear face masks most of the time. This caused original face recognition models to be ineffective because most of them are trained using uncovered faces. Face masks usually covers half of face. This means the model that trained using non-masked face must recognize faces using half data than usual. This is the challenge that original face recognition model is facing.