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Developers
Updating Firmware
20 Oct 2018

Keycard applet updates are done by reinstalling the applet CAP using a smartcard reader.

  • Use the Keycard CLI with a USB reader.
  • Download the latest applet version from GitHub releases and follow the reinstallation scripts.

Keycard Shell firmware and its clear-signing database are updated separately.

  • Online: Use the WebHID updater at https://shell.keycard.tech/update (requires USB data transfer enabled).
  • Offline: Use the Keycard Shell updater on an offline computer.
  • From source: Build and sign firmware from the Keycard Shell repo. Official devices accept only signed firmware; custom firmware requires a bootloader key you control on a self-built device.

For step-by-step user flows, see the help pages:

Last edited
20 Oct 2018