Subject: Re: [certid] some info from SSL labs cert survey data

From: "Jeffrey A. Williams" <[email-masked]>
Date: Fri, 15 Oct 2010 16:50:09 -0500 (GMT-05:00)

Jeff and all,

  Are you saying that self-singed certs are not valid?  If
so, how on earth did they get into the dbase?

-----Original Message-----
>From: =JeffH <[email-masked]>
>Sent: Oct 15, 2010 4:01 PM
>To: IETF cert-based identity <[email-masked]>
>Subject: [certid] some info from SSL labs cert survey data
>
>I've done some modest poking around the SSL labs cert survey data, below's some 
>numbers.
>
>First, the dataset has 867361 domains along with data extracted from their 
>certs (one row per domain). The details on how Ivan selected the domains are here..
>
><http://blog.ivanristic.com/2010/07/ssl-server-survey-so-whats-with-the-22m-invalid-certificates-claim.html>
>
>That explanation hints that most all the certs represented in the dataset would 
>be "valid" certs.  However, there's ~150k more entries in the dbase than the 
>~720K valid certs he observed. Though, there's ~150k apparently "self-signed" 
>certs in the dbase, so perhaps that's what's filling out the dbase.
>
>
>Here's some quick numbers..
>
>
>
>all 867361 have a "CN=" in the subject name (CN-ID).
>
>None appear to have more than one CN-ID
>
>
>
>392497 (45%) use the subjectAltName field for at least one altName (of some 
>type (I haven't yet investigated whether he gathered more than only DNS-IDs 
>(but upon quick browsing it looks like they are most all DNS-IDs)))
>
>6487  (0.75%) have > 5 altNames (of some type)
>
>145  (0.02%)  have > 50 altNames (of some type)
>
>
>
>33831  (4%) use a wildcard in their name in some fashion (they sometimes are in 
>CN-ID, or subjectAltName, or both it appears upon quick browsing)
>
>
>
>
>153113 (18%) have a null trustAnchor field - suggesting they are self-signed(?)
>
>99673  (11%) have subjectCommonName == issuerCommonName -- most self-signed(?)
>
>52929  (6%)  have subjectCommonName != issuerCommonName and a null trustAnchor 
>field.
>
>0            have subjectCommonName == issuerCommonName and a non-null
>trustAnchor field.
>
>
>There are 86 distinct trustAnchor names in the data set.
>
>
>
>HTH,
>
>=JeffH
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Regards,
Jeffrey A. Williams
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