FIELD: authentication.
SUBSTANCE: method comprises using a manual counter for generating acoustic or another wireless signal that represents a digital signature, receiving the signal by a receiver in a bank that requests the PIN code to access to the bill, introducing the PIN code by a user into the receiver in which the signal from the counter is coded with the PIN code, and sending the coded signal to the bank computer through an unsafe line because it is no way to verify that the PIN code is true without the key stored in the computer.
EFFECT: enhanced safety.
30 cl
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