page for smartcard and rfid applications
cardpeek for linux has scripting ability. the ACR units for rfid and smartcard on ebay work really well with linux.
there are smart rings that can hold 512 kb of data, you can actually 7z a encryption key and store it like that. would be easy to xor it against a second password to make it stronger. they come in lots of sizes but are too thick to be comfortable because it rubs on other fingers. might be better to get a thumb size ring.