A medical information system includes a portable device and remote authentication computing device. The portable device stores a person's personal medical information, which it does not allow to be accessed without authentication, and has an activation mechanism and a computing device communication mechanism. The remote authenticating computing device is connected to a computing device network and stores authentication information and has an authentication software module and a diagnostic software module. The activation mechanism communicates the device with the remote authenticating computing device. The authentication software module requests authentication information from a user, receives input authentication information, verifies received authentication data against the stored authentication information, and after successful verification allows the medical information to be accessed by a computing device. The diagnostic software module determines whether the portable device has been damaged or tampered with and if so the stored medical information is destroyed.