Just be aware that the full readers with PN532s tend to have an extra controller chip that makes them work seamlessly with windows but force you to add extra steps with on Linux.
Hence why I drive them through GPIO via arduinos.
Correct assumption.
It sits on top of my fifth metacarpal (the pinky one).
I tossed some more details in this thread:
Worth noting mine was a custom order. It’s a Flex DF2 with the old style antenna, with an added LED nail tossed on top of it and encapsulated together into a single implant.
From all my following experiments, it looks like my implant is over performatic by a mile.
To the point that there is one specific brand of card reader here that I need to use my left hand to present a bank card or they read the DF implant first! 
Seriously happy with it!
encryption capabilities for secure access control.
large enough storage.
efficient and reliable.
