Abstract: Methods, devices, and systems are described for sending and receiving messages between a terminal reader and a payment device, such as a credit card. A dynamic signature is calculated on the payment device from an application transaction counter, a terminal unpredictable number, and a transaction amount, and it is sent with an application the locator (AFL) to the reader. The reader then sends a read record command to the payment device to get records associated with the AFL, among other normal processing. While the normal processing is occurring for the transaction, the dynamic signature can be recalculated and compared with that from the payment device in order to assure that nothing has surreptitiously changed the values in the messages.

Abstract: Methods, devices, and systems are described for sending and receiving messages between a terminal reader and a payment device, such as a credit card. A dynamic signature is calculated on the payment device from an application transaction counter, a terminal unpredictable number, and a transaction amount, and it is sent with an application the locator (AFL) to the reader. The reader then sends a read record command to the payment device to get records associated with the AFL, among other normal processing. While the, normal processing is occurring for the transaction, the dynamic signature can be recalculated and compared with that from the payment device in order to assure that nothing has surreptitiously changed the values in the messages.

Abstract: Methods, devices, and systems are described for sending and receiving messages between a terminal reader and a payment device, such as a credit card. A dynamic signature is calculated on the payment device from an application transaction counter, a terminal unpredictable number, and a transaction amount, and it is sent with an application file locator (AFL) to the reader. The reader then sends a read record command to the payment device to get records associated with the AFL, among other normal processing. While the normal processing is occurring for the transaction, the dynamic signature can be recalculated and compared with that from the payment device in order to assure that nothing has surreptitiously changed the values in the messages.

Abstract: Methods, devices, and systems are described for sending and receiving messages between a terminal reader and a payment device, such as a credit card. A dynamic signature is calculated on the payment device from an application transaction counter, a terminal unpredictable number, and a transaction amount, and it is sent with an application file locator (AFL) to the reader. The reader then sends a read record command to the payment device to get records associated with the AFL, among other normal processing. While the normal processing is occurring for the transaction, the dynamic signature can be recalculated and compared with that from the payment device in order to assure that nothing has surreptitiously changed the values in the messages.

Abstract: A method comprising, at a reader, performing at least one transaction-based risk management process prior to energizing a contactless interface, initiating communication with a card utilized for a contactless transaction, receiving information associated with the card, terminating communication with the card, and authorizing the contactless transaction.

Abstract: A method comprising, at a reader, performing at least one transaction-based risk management process prior to energizing a contactless interface, initiating communication with a card utilized for a contactless transaction, receiving information associated with the card, terminating communication with the card, and authorizing the contactless transaction.

Abstract: A method. The method comprises, at a reader, performing at least one transaction-based risk management process prior to energizing a contactless interface, initiating communication with a card utilized for the contactless transaction, receiving information associated with the card, and terminating communication with the card to authorizing the contactless transaction.

Abstract: A method of performing a transaction over a contactless interface placing a first device in wireless communication with a second device, selecting the interface over which the first and second device with communicate, selecting the application to be used to approve or disapprove the transaction, communicating to the second device the data necessary for the application to approve or disapprove the transaction.

Abstract: A method. The method comprises, at a reader, performing at least one transaction-based risk management process prior to energizing a contactless interface, initiating communication with a card utilized for the contactless transaction, receiving information associated with the card, and terminating communication with the card to authorizing the contactless transaction.

Abstract: A method. The method comprises, at a reader, performing at least one transaction-based risk management process prior to energizing a contactless interface, initiating communication with a card utilized for the contactless transaction, receiving information associated with the card, and terminating communication with the card to authorizing the contactless transaction.

Abstract: A method of performing a transaction over a contactless interface placing a first device in wireless communication with a second device, selecting the interface over which the first and second device will communicate, selecting the application to be used to approve or disapprove the transaction, communicating to the second device the data necessary for the application to approve of disapprove the transaction.

Abstract: A method. The method comprises, at a reader, performing at least one transaction-based risk management process prior to energizing a contactless interface, initiating communication with a card utilized for the contactless transaction, receiving information associated with the card, and terminating communication with the card to authorizing the contactless transaction.

Abstract: A system and method for authorizing transactions where a terminal determines if the transaction amount is within a low value limit. If so, a card acts within the parameters of offline counters on the card to generate an offline authorization. The transaction amount is deducted from the available funds balance tracked by an additional counter on the card. Merchants clear the transaction during batch processing in the same manner as other debit or credit transactions. The transactions are treated as standard chip offline-authorized transactions and are sent with other transaction details to an issuer.

Abstract: A method of performing a transaction over a contactless interface placing a first device in wireless communication with a second device, selecting the interface over which the first and second device with communicate, selecting the application to be used to approve or disapprove the transaction, communicating to the second device the data necessary for the application to approve or disapprove the transaction.

Abstract: A system and method for authorizing transactions where a terminal determines if the transaction amount is within a low value limit. If so, a card acts within the parameters of offline counters on the card to generate an offline authorization. The transaction amount is deducted from the available funds balance tracked by an additional counter on the card. Merchants clear the transaction during batch processing in the same manner as other debit or credit transactions. The transactions are treated as standard chip offline-authorized transactions and are sent with other transaction details to an issuer.