If a ring is not personal enough for you, then the next step is getting the RFID chip implanted directly into your hand. There are even folks at hacker cons who will do that sort of thing for you ...

They intend the new chip-less RFID technology to support inventory management and conditions ... The coils, smaller than the ...

Scientists in Scotland have designed a chipless RFID tag, which they claim could make tags cheaper but also more sustainable.

As a show of its ability to thrive under adverse conditions, [Trammell Hudson] was able to shoehorn an ATtiny into an RFID circuit in a way that tests the limits of the chip design. The RFID ...