Systems and methods of using implanted or wearable micro electronic devices and for using a mobile device to communicate with and manage such micro electronic devices

A system, apparatus and method utilize a micro electronic device implanted in a person or group of persons, or wearable thereby, to manage a variety of activities, including logging in to an electronic device or system such as a PC or network. The method includes the steps of providing an RF microdevice having an electronic identification code and attaching the microdevice to the user. A PC system is provided including an RF reader and a processor. The user brings the microdevice near the reader, whereby the reader communicates with the microdevice via RF signals, and the RF reader signals the processor to corroborate the identification code. If the processor corroborates the identification code, the processor signals that a successful login has occurred. If the processor does not corroborate the identification code, a login is not confirmed.