From: "Lasse Kärkkäinen" <ljkarkk2@cc.hut.fi>
To: linux-kernel@vger.kernel.org
Subject: Re: urandom is too slow
Date: Fri, 02 Nov 2012 03:10:05 +0200 [thread overview]
Message-ID: <50931D6D.2080402@cc.hut.fi> (raw)
In-Reply-To: <20121030213850.7b987ddf@pyramind.ukuu.org.uk>
On 30.10.2012 23:38, Alan Cox wrote:
> If you want to wipe a disk issue a security erase command via hdparm.
> There is no guarantee that simply writing crap all over it will re-use
> the same sectors of physical media, and for a flash drive it causes
> massive wear and takes forever while a security erase is normally near
> immediate. Alan
Thank you for your answers, they should be very helpful for someone who
is actually blanking or shredding their disks. However, I am just
genuinely interested on why is no better CSPRNG algorithm used in the
kernel (is it simply because no-one sent a patch or am I missing
something?).
next prev parent reply other threads:[~2012-11-02 1:10 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-10-30 14:55 urandom is too slow Lasse Kärkkäinen
2012-10-30 18:54 ` Theodore Ts'o
2012-10-30 20:56 ` Pádraig Brady
2012-10-30 21:38 ` Alan Cox
2012-11-02 1:10 ` Lasse Kärkkäinen [this message]
2012-11-02 19:56 ` Theodore Ts'o
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