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

Ryan Sleevi sleevi at google.com
Thu Apr 21 08:54:01 UTC 2016

On Wed, Apr 20, 2016 at 6:07 PM, Jacob Hoffman-Andrews <jsha at letsencrypt.org
> wrote:

> 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.
As would Google
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