1. A method, comprising: receiving an indication of a request by a user to unlock a mobile device in a locked state; capturing one or more images of the face of the user; extracting facial components of the user from the one or more captured images; determining whether the user is an authorized user based at least in part on a comparison of the facial components of the user extracted from the one or more captured images to facial components of the authorized user from one or more authentication images of the authorized user stored on the mobile device; unlocking the mobile device if the user is determined to be the authorized user; and maintaining the locked state of the mobile device if the user is determined not to be the authorized user.