FEITIAN OpenSK Dongle V2 | Open-Source FIDO U2F USB Security Key

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FEITIAN has actively joined the Google OpenSK initiative by manufacturing the first OpenSK Dongle V1 and we're excited to release the latest version V2.

To help and accelerate FIDO security key adoption, FEITIAN has designed a new PCB by removing unnecessary components and improved the OpenSK dongle casing, allowing users to build firmware from the Google OpenSK source code and using our open-source OpenSK hardware dongle to test and experience FIDO authentication.

What is OpenSK?

OpenSK is an open-source implementation developed by Google for security keys, written in Rust that supports both FIDO U2F and FIDO2 standards. Google's OpenSK open-source firmware, combined with an open-source USB hardware dongle, allows end-users to make their own security key to use for authentication and security.


  • Supports Google OpenSK open-source firmware
  • Allows users to make their own security key to test and experience FIDO authentication
  • Improved method to enter bootloader mode: Press and hold user button for 8 seconds, then release to enter bootloader
  • Metal housing
  • Single button with built-in LED
  • Interface: USB-A
  • Dimensions: 2" x 0.75" x 0.25" inches

How to enter bootloader mode

Connect the USB dongle into your computer, then press and hold the user button for 8 seconds, then release the button. The LED will flash red, indicating that its in bootloader mode.

LED Status Lights

LED Status


Warranty: This product comes with a 1-year warranty from the date of purchase.