[openssl-project] Entropy seeding the DRBG

Kurt Roeckx kurt at roeckx.be
Mon Apr 30 16:22:09 UTC 2018

On Mon, Apr 30, 2018 at 06:00:20PM +0200, Richard Levitte wrote:
> So I'd like to have it confirmed that I'm reading this right, that's
> about 0.08 entropy bits per 8 data bits?  Or is it per data bit?

Per symbol, being 8 bits for what you provided.

> Depending on the interpretation, we either have 1 bit of entropy per
> 12 data bits...  or per 100 data bits...  The latter has my heart
> sinking...

It's per 100 bits, and that's really still an overestimate. One of
the models they used was able to predict it that well. It might be
possible to create a better model.


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