Electrical computers and digital processing systems: support – Data processing protection using cryptography – Tamper resistant
Reexamination Certificate
1998-12-23
2001-11-13
Hayes, Gail (Department: 2131)
Electrical computers and digital processing systems: support
Data processing protection using cryptography
Tamper resistant
C380S052000, C713S190000, C713S152000
Reexamination Certificate
active
06317835
ABSTRACT:
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a method and system for using a touch screen as a conventional touch screen and also as a cryptographic Personal Identification Number (PIN) Entry Device (PED).
2. Description of the Prior Art
There are two defacto industry standards for user input in public access devices. The use of each standard depends on the application as each has a specific purpose. The two technologies are touch screen and a keyboard for entry of a personal identification number (PIN pad). Examples of touch screens include information kiosks, custom greeting card do-it-yourself terminals, fast food self-order terminals, etc. PIN pads may be used anywhere a debit card may be used such as grocery store checkout lane terminals, Automatic Teller Machines (ATM), and gasoline dispensers. Usually PIN pads are configured like a telephone key pad and the user enters an access code that is packaged and sent to a remote processor for validation.
Choosing one type of public device over the other means sacrificing functionality to the user. If a touch screen is selected, a debit card or any other payment method requiring an encrypted digital signature such as passive debit cards cannot be accepted for payment at the terminal. The reason for this is security. Any machine that requires an encrypted digital signature such as a user's personal identification code must include security measures to prevent unauthorized access to the code. On the other hand, if a PIN pad is chosen, the user must translate a request for input from a screen to input on a numeric keypad. This type of interface is non-intuitive to the user as it diverges from the familiar point-and-click interaction model of modern applications.
To overcome the shortcomings of each, many systems include both a touch screen and a keypad. This combination of an interface is also non-intuitive to the user as some input is entered on the touch screen and other input is entered on the keypad.
SUMMARY OF THE INVENTION
The present invention is directed to a system and method that coalesces a touch screen and a PIN pad into a single secure device that meets the requirements of both. The system and method includes advantages of each system with a small cost increase and requires low maintenance. The system and method selectively generates encrypted and non-encrypted data within a touch screen device and transmits the data to a remote processor. The system and method comprises a sensing means for detecting the coordinates of a touch on the touch screen device, a toggling means for toggling between an encryption and non-encryption mode, and a processing means for encrypting data associated with the coordinates of the touch and transmitting the encrypted data to a remote processor, if the toggling means is in the encryption mode, or transmitting data associated with the coordinate of the touch in an unencrypted format to the remote processor, if the toggling means is in the non-encryption mode.
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Bilger Aaron
Dudgeon Michael
Finley Michael C.
Wade John
Hayes Gail
Needle & Rosenberg P.C.
Radiant Systems, Inc.
Song Ho S.
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