Abstract: A user input system comprising a vibration motor, a sensor and a processor in communication with the sensor. The vibration motor is in contact with a surface and generates vibrations in the surface. The vibrations can be altered by a user touching the surface to create altered vibrations. The sensor is in contact with the surface and detects the altered vibrations. The processor receives and analyzes data corresponding to the altered vibrations. The processor determines, based on the analyzed data, whether a user's touch on the surface matches a stored vibration profile of the user.

Abstract: A user input system comprising a vibration motor, a sensor and a processor in communication with the sensor. The vibration motor is in contact with a surface and generates vibrations in the surface. The vibrations can be altered by a user touching the surface to create altered vibrations. The sensor is in contact with the surface and detects the altered vibrations. The processor receives and analyzes data corresponding to the altered vibrations. The processor determines, based on the analyzed data, whether a user's touch on the surface matches a stored vibration profile of the user.

Abstract: A methodology of using an (preferably uni-directional) out-of-band channel for secure information transmission between two devices capable for LPRF communication is provided. Information, which is intended for secure transmission from one of the devices to the other device, is encoded into a time dependent visual sequence. The visual sequence may comprise one or more visual signals, in particular lighted-up and dark states. The visual sequence is emitted in a time-dependent visual signal by a light emitter of the one device and the emitted signal is detected by a light sensor of the other device on the basis of the detected signal. The time-dependent signal especially timely varies in the light intensity. The light sensor generates a (time-dependent) sequence of detection signals. These detection signals are decoded to reconstruct the information intended for secure transmission.

Abstract: A first device may authenticate a key of a second device (after discovering the second device, and executing a pairing protocol with the second device, wherein a result of the pairing protocol is a bit string) by encoding the bit string, transmitting a human-perceptible representation of the encoded bit string, transmitting a human-perceptible distinctive end of string indicator, receiving human feedback and determining whether or not a key of the second device is authentic based on the received human feedback. At the first device, wireless communications with the second device may be controlled based on the determination of whether or not the key of the second device is authentic.