Knocking on a door in a unique temporal pattern may be used to tell the building occupants that someone they trust wants to come in.
This is hardly the security of our cyber-era -or is it?
Today’s invention is a related alternative to the conventional secure login methods for a touchscreen-enabled device.
A user touches the screen anywhere in a certain temporal sequence. The machine can detect this and decide whether to log him in or issue a refusal. Either way, the touching can be done silently and in such a way as to be very hard to shoulder surf.