US Patent 11423389 Personalized QR codes for ATM authentication

Disclosed herein are system, method, and computer program product embodiments for creating a personalized barcode for an account holder at an Automated Teller Machine (ATM). An embodiment operates by storing account holder unique data and a first rule for generating a personalized barcode unique to the account holder based on the account holder unique data. After receiving a request for completion of a transaction from the first account holder, placing the account holder unique data and the first rule in a pairing service. Thereafter, the ATM is configured to retrieve the account holder unique data and the first rule from the pairing service, generate the first personalized barcode based on the first rule and the account holder unique data, and present the first personalized barcode to the first account holder.