RFID Ring Swipes Just Like A Subway Card

RFID Ring Swipes Just Like A Subway Card

Wearable tech that gets rid of the need to dig around for public transportation fare.

Ross Brooks
  • 3 september 2013

MIT graduate Chris Benson, along with co-founders from the Singapore University of Technology and Design (SUDT) have come up with a solution to the problem of digging through your bag for a transport card.

The “Sesame Ring” is a 3D-printed piece of wearable technology embedded with an RFID chip that makes it easy to access MBTA train stations. Initially, the trio tried key chains, bracelets, and iPhone cases, but decided that rings were the best solution.


After testing the idea with incoming freshman at SUDT, replacing student IDs with the rings, the trio move on to bigger things.

They set up the company Ring Theory as a platform for the idea, and have since launched a Kickstarter campaign as well.

For a pledge of $20, you can be the proud owner of a more convenient way to get through train station barriers. Once you have pledged, all you have to do is choose from one of seven different colors, whether you want a gold or silver ring face, and tell the company your ring size.


There is also the option to add a four-letter insignia, or your own custom design for those looking to make a fashion statement.

Benson is confident the idea can be applied in offices, university campuses, and other places where identification is required, such as a bicycle rental systems. He also hopes to combine multiple identifications into one ring at some point, meaning one piece of wearable tech could replace an entire wallet at some point.

Ring Theory


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