basis of identification Biometrics have major problems in real world situations How do you revoke keys? Biology is messy We leave dnA, fingerprints everywhere just ask OJ How do you give a mugger your fingerprint? How do you authenticate if he's just hit you in the eye?7 basis of identification – Biometrics have major problems in real world situations • How do you revoke keys? • Biology is messy –We leave DNA, fingerprints everywhere - just ask OJ • How do you give a mugger your fingerprint? • How do you authenticate if he’s just hit you in the eye?