[raverbashing]

The keys are revocable and replaceable (and it was probably a member state set of keys), so it shouldn't be too big of a deal

[WinstonSmith84]

Are you suggesting that a few hundreds millions certificate shall be re-issued, distributed either in person, or per email, or even per post for some countries? Sounds easy :-)

[mr_mitm]

Depends on how many certificates become invalid now.

[Uberphallus]

Yeah, if half-smart, certificates should expire relatively frequently to contain damage in such a scenario.