You can do it in many (all?) of the EU, I think, since the ID card can be used to produce a cryptographic signature. It's not a GPG signature, but that would b

You can do it in many (all?) of the EU, I think, since the ID card can be used to produce a cryptographic signature. It's not a GPG signature, but that would be an easy ramp to GPG signatures. These days though I think GPG is of dubious utility, you could just as well use your ID to sign stuff and stop at that.