Method and system for conducting a transaction using a proximity device and an identifier
First Claim
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1. A method of conducting a transaction with a payment account having an associated account number and using a proximity device, comprising:
- associating an identifier with said account number;
dynamically generating a first authentication value;
transmitting not the payment account number but the first authentication value and said identifier from the proximity device;
including the first authentication value in a discretionary data field of message data, the message being arranged in an ISO format; and
transmitting the message data including said identifier for verification.
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Abstract
A proximity device transmits a first dynamic authentication value contactlessly to a terminal. The first authentication value is included in a discretionary data field of message data arranged in an ISO Track 1 and/or ISO Track 2 format. Message data is sent from the terminal to an issuer. The issuer separately derives a second authentication value and compares it with the first authentication value. An identifier associated with the primary account number (PAN) is also used and transmitted instead of the PAN.
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Citations
12 Claims
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1. A method of conducting a transaction with a payment account having an associated account number and using a proximity device, comprising:
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associating an identifier with said account number;
dynamically generating a first authentication value;
transmitting not the payment account number but the first authentication value and said identifier from the proximity device;
including the first authentication value in a discretionary data field of message data, the message being arranged in an ISO format; and
transmitting the message data including said identifier for verification. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for conducting a transaction with a payment account having an associated account number and using a proximity device, comprising a processing arrangement configured to perform the steps of:
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associating an identifier with said account number;
dynamically generating a first authentication value;
transmitting not the payment account number but the first authentication value and said identifier from the proximity device;
including the first authentication value in a discretionary data field of message data, the message data being arranged in an ISO format; and
transmitting the message data including said identifier for verification. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification