Inspiration

WristPass was inspired by the fact that NFC is usually only authenticated using fingerprints. If your fingerprint is compromised, there is nothing you can do to change your fingerprint. We wanted to build a similarly intuitive technology that would allow users to change their unique ids at the push of a button. We envisioned it to be simple and not require many extra accessories which is exactly what we created.

What it does

WristPass is a wearable Electro-Biometric transmission device and companion app for secure and reconfigurable personal identification with our universal receivers. Make purchases with a single touch. Check into events without worrying about forgetting tickets. Unlock doors by simply touching the handle.

How we built it

WristPass was built using several different means of creation due to there being multiple parts to the projects. The WristPass itself was fabricated using various electronic components. The companion app uses Swift to transmit and display data to and from your device. The app also plugs into our back end to grab user data and information. Finally our receiving plates are able to handle the data in any way they want after the correct signal has been decoded. From here we demoed the unlocking of a door, a check in at a concert, and paying for a meal at your local subway shop.

Challenges we ran into

By far the largest challenge we ran into was properly receiving and transcoding the user’s encoded information. We could reliably transmit data from our device using an alternating current, but it became a much larger ordeal when we had to reliably detect these incoming signals and process the information stored within. In the end we were able to both send and receive information.

Accomplishments that we're proud of

  1. Actually being able to transmit data using an alternating current
  2. Building a successful coupling capacitor
  3. The vast application of the product and how it can be expanded to so many different endpoints

What we learned

  1. We learned how to do capacitive coupling and decode signals transmitted from it.
  2. We learned how to create a RESTful API using MongoDB, Spring and a Linode Instance.
  3. We became more familiarized with new APIs including: Nexmo, Lyft, Capital One’s Nessie.
  4. And a LOT of physics!

What's next for WristPass

  1. We plan on improving security of the device.
  2. We plan to integrate Bluetooth in our serial communications to pair it with our companion iOS app.
  3. Develop for android and create a web UI.
  4. Partner with various companies to create an electro-biometric device ecosystem.
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