UPI or Unified Payments Interface is a revolutionary new
payment system developed by the National Payments Corporation of India (NPCI)
and the Unique Identification Authority of India (UIDAI). It is a fool-proof
and secure system as the transactions are carried over in a highly encrypted
format. It also comprises of Two Factor authentications. It uses an email-like
virtual payment address (VPA) instead of a bank account number or any other
detail. The person uses a mobile banking personal identification number (MPIN)
to authorize payment.