Provided are a payment method and system through generation of a one-time payment-only number of a real card linked with an application, wherein in order to make payment safely by generating a one-time payment-only number every payment without leaving card information of a user in a provider's payment terminal or by using the generated one-time payment-only number, when a real card is linked with an application installed on a user terminal and the payment terminal recognizes the real card, a user signature input window, and transaction information about payment performed with a one-time payment-only number generated by a card company server are displayed on a screen of the application of the user terminal, and payment is performed when a signature of the user is input to the signature input window.

To conduct a payment transaction at a merchant's point of sale using a mobile device, the mobile device initiates an authenticated communication session with a payment agent. The payment agent is an entity responsible for facilitating a payment transaction between the merchant and purchaser via their respective financial institutions. During the authenticated communication session, response to an input indicating the user of the mobile device wishes to make a payment, the mobile device generates a unique payment key that is based on at least one unique data of the mobile device. The mobile device transmits the payment key to the payment agent, and then transfers a copy of the payment key to the point of sale system. The merchant's payment system that transmits the payment key to the payment agent in a transaction request. The payment agent then verifies that the received payment key is the same as they received from the mobile device, and that the authenticated communication session is still valid, and then approves the transaction.

Disclosed are various embodiments for detecting security breaches using watchdog transaction accounts. A security agent can initiate a purchase with a first electronic commerce system and provide a watchdog transaction account as payment for the purchase. The security agent can then store a record of the purchase which includes a merchant identifier for the merchant and the watchdog transaction account. Subsequently, a transaction authorization system can determine that authorization for a transaction with second electronic commerce system failed. If the transaction authorization system determines that the account used in the transaction with the second electronic commerce system, then the transaction authorization system can determine that the first electronic commerce system has suffered a security breach.

A method and system are disclosed in an electronic payment network, for associating a payment card of a cardholder with a personal computing device of the cardholder, then authenticating the payment card in electronic transactions processed in the network. The card and a device activation code are input to the cardholder device by the cardholder, then communicated sent to a remote server for obtaining a card token. The server generates a device token and an authorisation token, stores the generated tokens together with the card token, and sends the card and device tokens to the cardholder device for storage. Whenever a transaction is processed in the network, the payment card is authenticated by inputting authenticating data to the cardholder device for generating an authorisation token, which is sent to the server with the stored card and device tokens, for a matching operation against the card, device and authorisation tokens at the server.

A payment integrated loyalty system including a point of sale terminal comprising a card reader, a communication subsystem configured to wirelessly communicate with a payment instrument, and configured to communicate over a network with at least a first and second server. The payment integrated loyalty system includes a processor in communication with the communication subsystem and card reader, configured to receive, through the communication subsystem, a payment instrument identifier associated with the payment instrument, and obtain a fingerprint based on one-way encrypting the payment instrument identifier. The processor is further configured to receive, from the first server via the communication subsystem, a loyalty balance associated with the fingerprint and to complete the financial transaction based on an updated amount based on the loyalty balance.

A method for preventing duplicate processing of a payment transaction includes: generating a first data structure with a first predetermined time interval and generating a second data structure with a second predetermined time interval. A first overlap region and second overlap region of the first and second predetermined time interval are defined by a same time interval. The method includes receiving first transaction data associated with a first payment transaction, receiving second transaction data associated with a second payment transaction, and determining based on a first transaction ID and a second transaction ID, that the second payment transaction is a duplicate of the first payment transaction. A computer program product and system for preventing duplicate processing of a payment transaction are also disclosed.

A method and system include providing a user interface associated with an issuer of an account; receiving, at the user interface, a request to generate a token associated with a user account; generating at least one token associated with the user account; authenticating one or more elements associated with the user account, wherein authentication may be one of prior to and subsequent to the generation of the at least one token; and receiving the at least one token. Numerous other aspects are provided.

Systems and methods for facilitating a disbursement of funds to a payee are provided. The methods include receiving a payment request from a payor; generating a code, such as barcode, a Quick Response (QR) code, a Near Field Communication (NFC) code, or a textual string, that corresponds to the received payment request; transmitting the generated code to the payee; validating the code when the code is entered into a payment disbursement machine, such as an automated teller machine; and disbursing at least one of the funds and a payment voucher via the payment disbursement machine.

Methods and apparatuses for supporting transactions of products are provided. One of the methods comprises, receiving, by a second terminal, information of a seller that is selling the products, from a first terminal, requesting, by the second terminal, verification of the seller's information from a server, in response to successful verification of the seller's information, acquiring, by the second terminal, a transaction identifier for the products from the server, measuring, by the second terminal, a distance from the first terminal creating, by the second terminal, transaction data including the measured distance and the transaction identifier, requesting, by the second terminal, verification of the transaction data from the server and in response to receiving a message indicating successful verification of the transaction data from the server, performing, by the second terminal, a payment routine for the products.

The disclosure relates to a deferred real-time payment (RTP) in a trusted and secure system environment to pay for a deferred fulfillment order. The deferred fulfillment order includes products or services that may be fulfilled in part or in full after authorization of the deferred RTP. To facilitate trust and security, a deferred payment system may digitally sign certificates issued to various entities in the system environment. Devices in the system environment may transmit and receive messages to create and later settle deferred RTPs that are trusted based on authentication of the digitally signed certificates, which mitigate against security threats such as man-in-the-middle attacks in a communication network.