An inductor and 8-pin microcontroller are all that make up this barebones RFID tag. You might have done ... This one uses a PIC 12F683 but should work with just about any 12F or 16F model.

Security researcher [Fran Brown] sent us this tip about his Tastic RFID Thief, which can stealthily snag the information off an RFID card at long range. If you’ve worked with passive RFID before ...