qmk_firmware/feature_secure.md

Secure

The secure feature aims to prevent unwanted interaction without user intervention.

?> Secure does not currently implement encryption/decryption/etc and should not be a replacement where a strong hardware/software based solution is required.

Unlock sequence

To unlock, the user must perform a set of actions. This can optionally be configured to be multiple keys.

• While unlocking all keyboard input is ignored
• Incorrect attempts will revert back to the previously locked state

Automatic Locking

Once unlocked, the keyboard will revert back to a locked state after the configured timeout. The timeout can be refreshed by using the secure_activity_event function, for example from one of the various hooks.

Usage

Add the following to your rules.mk:

SECURE_ENABLE = yes

Keycodes

Key	Aliases	Description
QK_SECURE_LOCK	SE_LOCK	Revert back to a locked state
QK_SECURE_UNLOCK	SE_UNLK	Forces unlock without performing a unlock sequence
QK_SECURE_TOGGLE	SE_TOGG	Toggle directly between locked and unlock without performing a unlock sequence
QK_SECURE_REQUEST	SE_REQ	Request that user perform the unlock sequence

Configuration

Define	Default	Description
SECURE_UNLOCK_TIMEOUT	5000	Timeout for the user to perform the configured unlock sequence - 0 to disable
SECURE_IDLE_TIMEOUT	60000	Timeout while unlocked before returning to locked - 0 to disable
SECURE_UNLOCK_SEQUENCE	{ { 0, 0 } }	Array of matrix locations describing a sequential sequence of keypresses

Functions

Function	Description
secure_is_locked()	Check if the device is currently locked
secure_is_unlocking()	Check if an unlock sequence is currently in progress
secure_is_unlocked()	Check if the device is currently unlocked
secure_lock()	Lock down the device
secure_unlock()	Force unlock the device - bypasses user unlock sequence
secure_request_unlock()	Begin listening for an unlock sequence
secure_activity_event()	Flag that user activity has happened and the device should remain unlocked