Certificate Transparency Version 2
A lot of people didn’t like that the original version had a delay before you could issue a new certificate. So, we redesigned the protocol to avoid that problem.
In a nutshell, a new certificate is sent to the log, which immediately returns a signed hash of the certificate, indicating that the cert will be included in the log. It is required to actually appear in the log before a certain amount of time has passed. Other than that, everything proceeds along the same lines as before, though there are many detailed changes.
As always, comments welcome.