Browse Prior Art Database

Input Protection for Personal Identification Number

IP.com Disclosure Number: IPCOM000036399D
Original Publication Date: 1989-Sep-01
Included in the Prior Art Database: 2005-Jan-29
Document File: 2 page(s) / 47K

Publishing Venue

IBM

Related People

Schoettler, P: AUTHOR

Abstract

The Personal Identification Number (PIN) input is protected against unauthorized view. For this purpose, an optical privacy filter is used which is arranged above the PIN keyboard. With the privacy filter in place, the keyboard can be viewed only vertically but not from the side.

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Input Protection for Personal Identification Number

The Personal Identification Number (PIN) input is protected against unauthorized view. For this purpose, an optical privacy filter is used which is arranged above the PIN keyboard. With the privacy filter in place, the keyboard can be viewed only vertically but not from the side.

The embodiment described in this article concerns, in particular, an automatic teller machine, the keyboard of which is covered by an optical privacy filter. During the PIN input, the keyboard covered by the filter is visible only to the authorized person. An additional feature of the optical privacy filter is that its size considerably exceeds that of the underlying keyboard so that unauthorized persons are unable to catch sight of the PIN.

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