Is that in the RFID tag? I know US passports have those embedded, but I wasn't sure about other nationalities.
I'd be curious to learn more about how they verify those signatures as well; I can imagine it being nontrivial/de facto limited to a collection of trusted partner nations.
They definitely do have it in the RFID tag. Depending on your nationality, some have it printed in a larger QR-code like thing, I think. There’s an international standard, but I wouldn’t know where to find it.
It's specified by IATA. It's an NFC tag, not RFID, and the data is a JPEG2000 image with its hash embedded inside an X.509 certificate. There's no public root store: the national root certs are passed around between governments using diplomatic bags.
The standards are all public and anyone can write an app to verify e-Passports. There are Android apps on the Play Store that can do it, although they don't necessarily have complete collections of national certs.
