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

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Message-Id: <200712090010.10362.ismail@pardus.org.tr>
Date:	Sun, 9 Dec 2007 00:10:10 +0200
From:	Ismail Dönmez <ismail@...dus.org.tr>
To:	Adrian Bunk <bunk@...nel.org>
Cc:	Bill Davidsen <davidsen@....com>,
	Marc Haber <mh+linux-kernel@...schlus.de>,
	linux-kernel@...r.kernel.org
Subject: Re: Why does reading from /dev/urandom deplete entropy so much?

Sunday 09 December 2007 00:03:45 tarihinde Adrian Bunk şunları yazmıştı:
> On Thu, Dec 06, 2007 at 02:32:05PM -0500, Bill Davidsen wrote:
> >...
> > Sounds like a local DoS attack point to me...
>
> As long as /dev/random is readable for all users there's no reason to
> use /dev/urandom for a local DoS...

Draining entropy in /dev/urandom means that insecure and possibly not random 
data will be used and well thats a security bug if not a DoS bug.

And yes this is by design, sigh.

-- 
Never learn by your mistakes, if you do you may never dare to try again.
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