ELI5: What is "Something You Are"?
This is a body-based proof of identity, like your fingerprint or your face. Nobody else has the same ones, so they are very hard to fake.
Definition
“Something you are” is one of the three primary authentication factors in multi-factor authentication, and refers to biometric characteristics unique to an individual. These include physical characteristics like fingerprints, facial geometry, iris patterns, and vein patterns, as well as behavioral characteristics like voice patterns and typing rhythms.
Key Details
- Fingerprint scanning: most common biometric; used in smartphones, laptops, and physical access systems
- Facial recognition: camera-based; increasingly common on mobile devices (Face ID); privacy concerns in public spaces
- Iris scan: highly accurate; used in high-security physical access; requires specialized hardware
- Voice recognition: analyzes vocal characteristics; useful for phone-based authentication
- Biometrics cannot be changed if compromised — a major risk compared to passwords which can be reset
- Biometrics are stored as templates (hash-like representations), not the actual biometric data
Connections
- Parent: mfa — biometrics is the “something you are” authentication factor in MFA
- See also: something-you-have