They can't backdate their Certificate Transparency log without leaving cryptographic evidence behind. That's how CT is designed to work. Of course, simply bein

They can't backdate their Certificate Transparency log without leaving cryptographic evidence behind. That's how CT is designed to work. Of course, simply being in the log doesn't imply the cert was issued correctly, but the logs have been posted for a couple of months now and have received a lot of scrutiny during Mozilla's investigation. But the same is true for Google's log, presence in that log is also no guarantee that it was issued correctly.