Amy Johnston's 'Hidden Agenda' Collar

Jewelry designer Amy Johntson’s ‘Hidden Agenda’ collection includes this RFID and silver collar. Each of the 45 radio-frequency tags concealed within the black discs are, “programmed to display an image, quote or question about tracking, surveillance and projection of identity,” says Johnston.

This secret information can be retrieved by a computer fitted with an RFID wand reader. This piece costs $1900, but the concept is a priceless reminder that we are being watched.

The sterling ring is also RFID-equipped and is offered by the designer, “as an alternative to subdermally implanting tags into humans.” A much more appealing option, I say.