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The new form factor for the URU Key FIDO2 Authenticator

A project log for URU Key

URU Key - a biometric FIDO2 Authenticator built with ESP32 / ATECC508A / FPC1020

Andrey OvcharovAndrey Ovcharov 11/09/2020 at 14:390 Comments

While working on the side project URU Card - the open-source authenticator device in the form-factor of a regular credit card - I have noticed that it is way more suitable for daily use. The device like this can be carried around simply in the wallet together with other credit cards.

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So, I have redesigned the device in this format. The biggest challenge I had was the power source. Luckily I could discover the ultra-thin lithium battery powerful enough, and it fits perfectly in the space between the logic board ad back cover.

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One more addition to the user experience - a tiny OLED display. It is more informative than simple LEDs in the previous version of the device so I am going to keep it in the design.

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Other than that, the device features the same set of core elements - ESP32 Pico D4 microcontroller, ATECC508A security element and the FPC1020 fingerprint scanner.

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The test utility shows that all the elements work properly and the device is able to perform authentication tasks exactly as the previous version.

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