linux-kernel - Re: Why does reading from /dev/urandom deplete entropy so much?

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Message-ID: <20071205151036.GF24685@torres.zugschlus.de>
Date:	Wed, 5 Dec 2007 16:10:36 +0100
From:	Marc Haber <mh+linux-kernel@...schlus.de>
To:	linux-kernel@...r.kernel.org
Subject: Re: Why does reading from /dev/urandom deplete entropy so much?

On Wed, Dec 05, 2007 at 08:33:20AM -0500, Theodore Tso wrote:
> BTW, note that it would be a polite thing for GnuTLS when it is
> encrpyting data, which represents information which might not be
> available to an adversary, and SHA1 hash it (out of paranoia) and feed
> it to /dev/random.  
> 
> This won't give any "credits" to the random entropy counter, but to
> the extent that is information that isn't available to the adversary,
> it adds additional uncertainty to the random pool.

I have filed this as https://savannah.gnu.org/support/index.php?106113

Thanks for suggesting.

Greetings
Marc

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