Germany has a suitable system built on an NFC chip in the federal ID (Personalausweis). When you get it (renewed), you get a transport pin, which you can use to

Germany has a suitable system built on an NFC chip in the federal ID (Personalausweis). When you get it (renewed), you get a transport pin, which you can use to set a regular usage pin, which you can then use to auth yourself to the NFC chip and make it provide some signed information to the remote end. Also, they are not particularly easy to fake to a degree that passes spot checks, anyways.