"The two-factor authentication in UPI is now being done with mobile phone as one factor, and MPIN as the second factor. But once you have Aadhaar authentication on the phone, then the second factor can be biometric authentication through Aadhaar," said Nilekani. Over time, the idea is to open Aadhaar authentication to third party apps, said another person familiar with the ongoing discussions, who did not wish to be named.
