But none of these may be as secure as [mircemk]’s Arduino-based door lock that employs a smartphone’s flashlight as a pass code. At first blush, this seems horribly insecure.

This proves that you have access to the secret, and can only be used once. To secure his Lego mini-figures, [Luca] built an authentication system using Google Authenticator and Arduino.

Electronics enthusiasts looking for a new project to keep them busy this weekend may be interested in this awesome fingerprint garage door lock which is powered by Arduino and has been created by ...