Secure Indication of operating Modes of Encrypting Pin Pads (EPP) used in automatic Teller Machines (ATM) .
Original Publication Date: 2002-Jul-12
Included in the Prior Art Database: 2003-Jun-21
Problem: Encrypting Pin Pads (EPP) are used in automatic teller machines (ATM) for entering the personal identification number (PIN). In addition the EPPs are used to enter the amount the user of the ATM wants to withdraw from his account because most ATMs do not have a separate keyboard with numerical keys. The first operation mode is called “PIN entry mode” . It is used for user identification by entering the personal identification number (PIN). The PIN will be encrypted inside the EPP and transmitted in encrypted form for further usage.