Which biometric identifier is most prone to aging?
Face is feasibly susceptible to aging.
Face is considered the most aging-sensitive biometric trait. While it’s affected by the natural process of growth, it’s also influenced by the climate conditions, health habits, gastronomic preferences, lifestyle, stress, and so on.
Other traits are less affected by aging. For example, human fingerprints stay permanent for the entirety of life with a few minor changes that cannot thwart biometric recognition. Iris is believed to be stable, even though it may show genuine match score distribution declining over the course of time. Aging also affects the larynx and vocal cords altering the voice.