The Gnuk Smartcard Based on the STM32F1x and Geehy APM32
Sign, authenticate and encrypt with a USB dongle at the cost of a soda. The goal here was to easily program around ~20 Gnuk devices at the budget of a single dongle of the commercial solution. Contains every step and fixes to get it running on current and next Ubuntu and Debian versions.
The Gnuk Smartcard Based on the STM32F1x and Geehy APM32 launched on May 1, 2025 with 10 votes, #2,185 of 7,905 launches that month and more than 75% of that year's launches. The site was still online in September 2026, 1 year on.
In plain words
Gnuk is a USB smartcard device based on STM32F1x and Geehy APM32 microcontrollers that performs cryptographic operations including signing, authentication, and encryption. Designed for developers and organizations needing affordable security tokens, it costs significantly less than commercial alternatives while enabling the programming of multiple devices at scale. The project includes complete setup instructions and compatibility fixes for current Ubuntu and Debian systems.
written from the facts on this page · September 2026
From the sources
Gnuk is a USB cryptographic token (smart card) for GNU Privacy Guard (GnuPG, GPG) and the OpenPGP card protocol v3, implemented on the STM32F103 microcontroller. - ran-sama/stm32-gnuk-usb-smartcard
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