Visa International Service Association

Emv Co. LLC

Carole Oppenlander

Jagdeep Singh Sahota

Trudy Hill

Christian Aabye

Kim R Wagner

William Chi Yuen Chan

Anita Ochieano

Craig Allen Glendenning

Patrik Smets

Eddy Lodewijk Hortensia Van De Velde

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.

Device, system and method for reducing an interaction time for a contactless transaction

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.

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.

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.

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.

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Pacifica, CA, United States of America

Carole Oppenlander