Operating a touch screen control system according to a plurality of rule sets

A method of operating a touch screen control system for an electronic device configured to detect user input in a sensing region and update a display screen, the method comprising:

• accessing rules stored in a memory, the memory configured to store security data, wherein the security data is inaccessible by a host processing system;
• displaying a security interface on the display screen, the security interface displayed based, at least in part, on the rules stored in the memory;
• receiving user input via the security interface;
• authenticating the user input based on the stored security data;
• and
• notifying the host processing system that the user input is authenticated.

An electronic device comprising:

• a touch screen comprising a touch sensor and a display screen;
• a host processing system;
• and
• a touch screen control system configured to communicate with said host processing system, said touch screen control system comprising:
• a memory configured to store security data, the stored security data inaccessible by the host processing system;
• and
• control circuitry configured to detect user input in a sensing region and update the display screen according to rules stored, at least in part, in said memory by:
• displaying a security interface on the display screen, the security interface displayed based on the rules stored in the memory;
• receiving the user input corresponding to the security interface;
• authenticating the user input based on the stored security data;
• and
• notifying the host processing system that the user input is authenticated.