Visa International Service Association

Pragathi M S

Rohit Sukhija

Hemanth Kumar Manoharan

A method and system for authenticating a payment transaction. The method includes receiving a request for verifying a phone number associated with a Subscriber Identification Module card from a merchant application installed in the user device. Further, obtaining a first key from at least one of a server associated with a manufacturer of the user device and a network server. Furthermore, generating a first cryptogram based on at least one of the phone number and a unique identification value associated with the user device using the first key, wherein the first cryptogram is provided to the server associated with the manufacturer for verification. Upon verification of the first cryptogram, the method includes receiving a second cryptogram from the server associated with the manufacturer, wherein the merchant application provides the second cryptogram and payment transaction details to an issuer server for authentication of the payment transaction.

Method and system of authenticating a payment transaction using a user device

Methods for updating an application programming interface (API) field of a transaction message may include receiving, with at least one processor, a payment transaction message, wherein the payment transaction message comprises data associated with a payment transaction; determining, with at least one processor, one or more API fields of the payment transaction message based on the data associated with the payment transaction; and modifying, with at least one processor, one or more API fields of the payment transaction message. Methods may also include transmitting, with at least one processor, a modified payment transaction message based on modifying the one or more API fields of the payment transaction message. Systems and computer program products are also disclosed.

System, method, and computer program product for updating an application programming interface field of a transaction message

A method for processing a payment transaction via a proxy guarantor includes: receiving a transaction request between a user and a merchant including payment device data associated with a payment device of the user of a payment type not accepted by the merchant, and an indicator causing the payment transaction to be processed as a proxy guarantor transaction; identifying a guarantor associated with the user having a payment device of a payment type accepted by the merchant; communicating an authorization request to an issuer system associated with the guarantor to cause the issuer system of the guarantor to authorize the payment transaction; receiving an authorization response from the issuer system of the guarantor, the authorization response including a payment transaction approval indicator; and communicating a settlement request to an issuer system of the user.

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Bengaluru, India

Pragathi M S