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Biometrics are a group of digital security methods that rely on biological or physiological attributes, used to prevent data breaches such as credit card hacks or unauthorized log-ins. Biometrics uses criteria that are physically unique to an individual that can prove their identities, such as a fingerprint or voice pattern, rather than relying on passwords or Personal Identification Number (PIN) codes that can be more easily hacked or stolen.

Source: https://www.investopedia.com/terms/b/biometrics.asp