On Mon, 26 Sep 2016 18:54:09 +0100
Gervase Markham <g...@mozilla.org> wrote:

> > The two *.zlbaba.com certificates (https://crt.sh/?id=30773543 and
> > https://crt.sh/?id=31103218) do not appear to be matching to me:
> > their public keys and serial numbers are different.
> 
> The serial numbers of all the pairs are different (which is good;
> issuing two certs with the same serial number is an RFC violation, see
> Issues H and P). I've not done an analysis of whether the public keys
> match for some of the pairs; feel free to do one if you like. If you
> think two different public keys casts doubt on the idea that these two
> certs were issued at the same time, feel free to think that. However,
> the document does not stand or fall on whether or not these are
> co-issued pairs or not; that is merely a conjecture to try and
> establish how long the misissuance happened for, as we have no other
> reliable dates.

Fair enough.  You should revise the following wording which says
that the serial numbers and public keys are the same:

> Many of the rest of the Macau certificates, which do not have an
> embedded SCT to show when they were issued, have “matching” SHA-256
> versions issued at some point in 2016, with everything the same
> except the issuing intermediate certificate, the hash algorithm and
> the notBefore/notAfter dates

It seems that the only similarity between matching certificates is the
subject+SANs.  (Plus EKU, AIA, CP, etc. but those are the same in all
WoSign certificates.)

Regards,
Andrew
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