Cool! Has anyone shown that a subdermal sized RFID chip is able to adhere to that? Further, does any RFID chip on the market have a real security story? Ideally

Cool! Has anyone shown that a subdermal sized RFID chip is able to adhere to that? Further, does any RFID chip on the market have a real security story? Ideally you'd have public/private key encryption with some programmability on the part of both the readers and the chips themselves (so readers can be told "here's the public key of ID#1234, so only trust that you've seen 1234 if you get something decryptable with this key", so they can't be easily spoofed, and RFID chips can be told "here's the public key of the reader(s) you should respond to; anyone else ignore"). Until that happens, I just don't see it being secure.