Trezor is an open-source cryptocurrency hardware wallet and security token allowing secure storage of private keys. It offers advanced features such U2F two-factor authorization, SSH login through Trezor SSH agent, GPG and a password manager. For more information, guides and documentation, see . To enable Trezor support, add the following to your configuration.nix: = true; This will add all necessary udev rules and start Trezor Bridge.