Open SmartHome System "Prototype for Everyone"

The ones made of wood are also much prettier and more practical than the other things.

The question is how they look after years in the wallet. ;)

Practically, the token that one already carries with them anyway

Chip in the hand is the only consistent solution (I even mean that seriously).

I hope, though, that I can use the Corona chip for other purposes as well. If Bill Gates, for example, had also built in MIFARE DESfire, I could use it to open the ekey locks :D:D:D (that was rather not so serious).

Yes. We still need to deal with the security of RFID and the token. Reading the token is at least not a problem (tool or mobile app...).

What kind of tokens are those if you think you can read them out?

Or put differently: If the door station uses such insecure transponders, it's worthless