This is a fascinating proof of concept.

Making the storage and access of data more convenient, artist Anthony Antonellis implanted an RFID chip into his hand that can store data which can be wirelessly accessed by a smartphone.

The chip is the size of a grain of sand and only holds about 1K of data, but it does work. Antonellis can use his smartphone to store data on the chip and retrieve the data as needed. The technology requires him to actually touch the implant with his phone, as the antennae’s reach is about 1 cm.