METHOD FOR INCREASING CASH MACHINE SAFETY

摘要

The present invention relates to a method, device (1, 800) and instruction set for enhancing the security of authentication codes or password by allowing the user to provide extra characters or digits to a series of authentication characters or digits when entering a secret password that the user wants to keep secret. The solution is then arranged to extract a sequence from the entered series of authentication characters or digits. The invention is advantageously utilized in relation to cash withdrawal machines (1 ) or to payment terminals in shops where the user provides an indication of when the authentication code has been entered.