[cabfpub] Pre-Ballot 164 - Certificate Serial Number Entropy

Jacob Hoffman-Andrews jsha at letsencrypt.org
Thu Apr 21 01:07:12 UTC 2016

I think the question of how to define entropy or CSPRNGs is a really good
one, but I think the core of this ballot, changing a SHOULD to a SHALL, is
too important to hold up on that complex question. How about a version
which is strictly no more ambiguous that the current  version:

"Effective April 1, 2016, CAs SHALL use a Certificate serialNumber greater
than zero (0) that exhibits at least 64 bits of entropy."

Let's Encrypt would be happy to endorse such a ballot.
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