biometrics
noun[U]
uk/ˌbaɪəʊˈmetrɪks/usthe use ofdetailedinformationabout someone'sbody, forexamplethepatternsofcolourintheireyes, inordertoprovewho they are:
Ahurdlefinancialinstitutionsmustovercomewith the use of biometrics is thefearofappearingtoointrusivetocustomers.