Security process for data entry keypad with touchscreen - uses keys with associated character changed randomly and visible only to user

摘要

The process uses a keypad (202) for data entry with each key associated with a valid character such as a letter or number. The associated character is displayed by a liquid crystal display adjacent to the key and may be changed at least after each use of the keypad in a random manner. The character display is constructed with a narrow arc of visibility to be readable by the keypad user only. The character may be displayed beneath a transparent touch sensitive screen so that pressure on the displayed character activates the data entry process. USE/ADVANTAGE - With smart card for telephone or bank card. Secure keypad for data entry prevents unauthorised acquisition of passwords or PIN numbers.