Date: Tue, 25 Nov 2003 07:24:03 +0100 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: Stefan =?iso-8859-1?Q?E=DFer?= <se@freebsd.org> Cc: freebsd-hackers@freebsd.org Subject: Re: "secure" file flag? Message-ID: <32476.1069741443@critter.freebsd.dk> In-Reply-To: Your message of "Tue, 25 Nov 2003 00:57:38 %2B0100." <20031124235738.GA4107@StefanEsser.FreeBSD.org>
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In message <20031124235738.GA4107@StefanEsser.FreeBSD.org>, Stefan =?iso-8859-1 >And that is what this thread is about: Secure removal of data from >storage media. There definitely is a difference between RLL (as in >1,7i RLL) and modern PRML drives under this aspect. No there isn't. It's been proven again and again that you cannot reliably overwrite data on a magnetic media. In particular the difference in read/write geometry and lack of fine control over head placement makes this impossible. The only reliable way to loose data is to encrypt them and throw the key away. Live with it. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 phk@FreeBSD.ORG | TCP/IP since RFC 956 FreeBSD committer | BSD since 4.3-tahoe Never attribute to malice what can adequately be explained by incompetence.
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