Keypad security
A method for detecting a fake keypad includes: monitoring outputs of plural magnetic field sensors connected to a keypad; detecting the output of at least one of the magnetic field sensors indicates the presence of a magnetic field; starting, in response to the detecting, a timer; determining the first timer reaches a first threshold while the output of the at least one of the magnetic field sensors still indicates the presence of a magnetic field; in response to the timer reaching the first threshold, determining a number of the magnetic field sensors whose output indicates the presence of a magnetic field equals or exceeds a second threshold; in response to the number of the magnetic field sensors equaling or exceeding the second threshold, determining a security action; and initiating the security action.
1. A method, comprising:
monitoring, by a computing device, outputs of plural magnetic field sensors connected to a keypad;
detecting, by the computing device, the output of at least one of the magnetic field sensors indicates the presence of a magnetic field;
starting, by the computing device and in response to the detecting, a timer;
determining, by the computing device, the first timer reaches a first threshold while the output of the at least one of the magnetic field sensors still indicates the presence of a magnetic field;
in response to the timer reaching the first threshold, determining, by the computing device, a number of the magnetic field sensors whose output indicates the presence of a magnetic field equals or exceeds a second threshold;
in response to the number of the magnetic field sensors equaling or exceeding the second threshold, determining, by the computing device, a security action; and
initiating, by the computing device, the security action.
2. The method of claim 1 , wherein the security action includes disabling the keypad.
3. The method of claim 1 , wherein the security action includes sending an alert to a user device.
4. The method of claim 1 , wherein the security action includes activating a camera that is integrated with a device to which the keypad is connected.
5. The method of claim 1 , wherein the security action includes activating a camera that is external to and pointed at a device to which the keypad is connected.
6. The method of claim 1 , wherein:
the security action is a first security action when the number of the magnetic field sensors equals a first predefined number; and
the security action is a second security action, different from the first security action, when the number of the magnetic field sensors equals a second predefined number different from the first predefined number.
7. The method of claim 1 , wherein the first threshold and the second threshold are configurable values based on a risk appetite.
8. The method of claim 1 , wherein the magnetic field sensors are Hall sensors.
9. The method of claim 1 , wherein the keypad is included in an electronic door lock.
10. The method of claim 1 , wherein the keypad is included in an automated teller machine.