Whakarāpopototia te tuhinga:  Kāore e roa ka taea e koe te whakatuwhera i tō waea mā te pupuri noa i te taha o tō mata. Kua waihangahia e ngā kairangahau tētahi pūoko e mōhio ana ki te āhua motuhake o tō taringa, o tō ringa, o tētahi atu wāhanga tinana rānei e hiahia ana koe ki te whakamahi hei uru atu ki tō pūrere. I huaina ko Bodyprint, ka huri te hangarau i tētahi mata pa pa pa noa hei pūtirotiro koiora e whakakore ana i te hiahia ki ngā taputapu motuhake pēnei i ngā kaipānui matimati, i ngā kāmera pōkākā rānei. Panuku ki raro mō te ataata. Kua waihangahia e nga Kairangahau i Yahoo Labs i California he pūoko ka taea te mohio ki te ahua o to taringa, tetahi atu waahanga tinana ranei e hiahia ana koe ki te uru atu ki to taputapu (kua whakaatuhia) I hangaia te Bodyprint e Christian Holz, Senaka Buthpitiya, me Marius Knaust mai i nga Yahoo Labs o California. Ko nga taipitopito o tana algorithm kei roto i ta raatau pepa, Bodyprint: Te Tautuhinga Kaiwhakamahi Biometric i runga i nga Pūrere Pūkoro Ma te Whakamahia o te Mata Paanga Capacitive ki te Matawai i nga Wahanga o te Tino. I hangaia te kāri Salt hei whakamutu i te mahi whakamamae o te whakatuwhera ā-ringa i te waea atamai, i te papa rānei mā te whakaoho aunoa i a ia i nga wa katoa e tata ana te kaiwhakamahi. Ka raka ano te taputapu rahi-kaari nama i nga taputapu i te wa e neke ana te kaiwhakamahi i waho o te tawhiti o te tekau waewae (toru mita). Ka hono atu a Salt ki tētahi taupānga i runga i te waea Android, iPhone rānei a te kaiwhakamahi mā te Bluetooth, ā, ka whakamōhio atu hoki ki a rātou mēnā kua tawhiti rawa atu rātou i tō rātou putea, kei reira te kamupene e whakaaro ana kei te rokirokihia te kāri Salt. I hangaia te kāri e te tokorua o Illinois, e Joel Paglione rāua ko Niko Zistakis. E kī ana rātau ka whakaorangia e rātau te 53 haora i te tau, i runga anō i te whakapono ko te toharite o te kaiwhakamahi waea e whakatuwhera ana i tana waea 150 ngā wā i te rā. 'Kei te whakauruhia e ngā waea pūkoro o nāianei ngā pūtirotiro matimati hei whakamana i ngā kaiwhakamahi mā te whakamahi i te pūtaiao me te whakakapi i ngā kupuhipa, kia māmā ake ai te whakamana mō ngā kaiwhakamahi,' i whakamārama ngā kairangahau. Heoi anō, nā te nui o te utu, kua whāitihia ngā pūtirotiro matimati pūhiko ki ngā waea o runga rawa, he hua o te whakataunga me te kounga o te pūoko e hiahiatia ana". I haere tonu rātau i te wā ko te taumira tāuru o te mata pa e ono noa iho ngā ira...
Ka whakaatuhia e Yahoo Labs i California he tikanga hou hei whakatuwhera i tō waea. Mā te pupuri noa i tō matenga, ka taea e tō rātau hangarau te mōhio ki tō taringa. Ka taea hoki e ia te whakamahi i ētahi atu wāhanga o te tinana pēnei i te ringa, i te nikau rānei ki te uru atu ki tō pūrere. Ka whakakorea te hiahia mō ngā pūmārō motuhake pēnei i ngā kaipānui matimati.