Trusted device

An apparatus comprising circuitry to:

• perform an authentication operation while the apparatus is being worn and thereby switch the apparatus to an authenticated state;
• maintain the apparatus in the authenticated state based on a determination that the apparatus continues to be worn following the authentication operation;
• and
• switch the apparatus out of the authenticated state based on a determination that the apparatus is no longer being worn following the authentication operation,
• wherein the circuitry is configured to communicate with and authenticate a device separate from the apparatus, and when detecting authentication of the device, to unlock the apparatus in response to a user touching the device.

A method comprising:

• performing an authentication operation while a wearable device is being worn and thereby switch the wearable device to an authenticated state;
• maintaining the wearable device in the authenticated state based on a determination that the wearable device continues to be worn following the authentication operation;
• switching the wearable device out of the authenticated state based on a determination that the wearable device is no longer being worn following the authentication operation;
• communicating with and authenticating a device separate from the wearable device;
• and
• when detecting authentication of the device, unlocking the wearable device in response to a user touching the device.