as far as that's a cost issue mirrors and so on the most sense as i can use to scan a fingerprint or face the more accurately i can capture someone's biometric profile for. the security of this technology depends on how well it's implemented or if there are enough senses this is more secure than passwords to find us. solution talk iris recognition fingerprint scans and facial recognition are similar in the sense that the old check for a single constant biometric feature. which the system recognizes me for a password by contrast is something i need to memorize i should write it down anywhere because otherwise anyone who finds it can pretend to be me. to complete the future