On 22/1/09 22:37, Johnathan Nightingale wrote:

It's certainly possible to add sites, though as I said in the post, it's
not my aim to be exhaustive. I just want to be thorough enough to be
able to draw meaningful conclusions from the data.


That's fine by me. I don't think you can be exhaustive because a lot of sites are hidden.

Anecdotally and from memory of a few years back: securityspace used to report that Verisign had around 100k certs out there, but Verisign employees said that was a massive underestimate. Their public filings and some scratch calculations suggested they had around 400k certs issued, at the time.

Those numbers are unreliable, but may point to something like a dark cert space of 3 times the visible cert space. It would be good to have a better estimate.

Hence there is no point in being exhaustive; you can't measure what you can't see anyway.


iang
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