Using TREZOR as hardware GPG agent
Generate new GPG signing key:
$ export TREZOR_GPG_USER_ID="Satoshi Nakamoto <satoshi@nakamoto.bit>"
Create new GPG identity:
$ trezor-gpg create > identity.pub # create new TREZOR-based GPG identity
$ gpg2 --import identity.pub # import into local GPG public keyring
$ gpg2 --edit "${TREZOR_GPG_USER_ID}" trust # OPTIONAL: mark the key as trusted
Create new subkey for an existing GPG identity:
$ gpg2 --list-keys "${TREZOR_GPG_USER_ID}" # make sure this identity already exists
$ trezor-gpg create --subkey > identity.pub # create new TREZOR-based GPG public key
$ gpg2 --import identity.pub # append it to existing identity
Generate GPG signatures using a TREZOR device:
$ trezor-gpg sign EXAMPLE # confirm signature using the device
$ gpg2 --verify EXAMPLE.asc # verify using standard GPG binary
Git commit/tag signature:
$ git config --local gpg.program "trezor-git-gpg-wrapper.sh"
$ git commit --gpg-sign # create GPG-signed commit
$ git log --show-signature # verify commits' signatures
$ git tag --sign "TAG" # create GPG-signed tag
$ git verify-tag "TAG" # verify tag signature
