FIELD: systems for conducting transactions.
SUBSTANCE: method for verification accompanying the process of conducting a transaction using a proximity device comprises the following steps: dynamically generating a first authentication value; transmitting the first authentication value from the proximity device to a terminal; 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 from said terminal to a verification device for verification.
EFFECT: enhancement of the security of operations.
75 cl, 10 dwg
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