I can suggest using TREZOR and Ledger Nano S hardware devices for common GnuPG operations, e.g. signatures and decryption. Please take a look at https://github

I can suggest using TREZOR and Ledger Nano S hardware devices for common GnuPG operations, e.g. signatures and decryption. Please take a look at https://github.com/romanz/trezor-agent/blob/master/README-GPG.md https://github.com/romanz/trezor-agent/blob/master/README-GP... for more details. Disclosure: I am the main developer of this project.