From owner-freebsd-security Tue Jul 13 11:25:39 1999 Delivered-To: freebsd-security@freebsd.org Received: from critter.freebsd.dk (critter.freebsd.dk [212.242.40.131]) by hub.freebsd.org (Postfix) with ESMTP id 3964714DDF for ; Tue, 13 Jul 1999 11:25:36 -0700 (PDT) (envelope-from phk@critter.freebsd.dk) Received: from critter.freebsd.dk (localhost [127.0.0.1]) by critter.freebsd.dk (8.9.3/8.9.2) with ESMTP id UAA25783; Tue, 13 Jul 1999 20:22:47 +0200 (CEST) (envelope-from phk@critter.freebsd.dk) To: Matthew Dillon Cc: "Allen Smith" , Wes Peters , FreeBSD Security Subject: Re: Secure Deletion In-reply-to: Your message of "Tue, 13 Jul 1999 11:15:23 PDT." <199907131815.LAA79582@apollo.backplane.com> Date: Tue, 13 Jul 1999 20:22:46 +0200 Message-ID: <25781.931890166@critter.freebsd.dk> From: Poul-Henning Kamp Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org In message <199907131815.LAA79582@apollo.backplane.com>, Matthew Dillon writes: > >:Just in case anybody wants to do this "RIGHT": >: >:UFS/FFS will issue B_FREEBUF strategy calls, which a device driver >:could turn into "secure delete" operations should the drive support >:this, or multiple over-writes if it doesn't. > > ... and this actually would work. I use B_FREEBUF in MFS to deallocate > underlying VM when possible, though I don't bother making it secure. Of course it does, it was written to do early delete on flash devices :-) -- Poul-Henning Kamp FreeBSD coreteam member phk@FreeBSD.ORG "Real hackers run -current on their laptop." FreeBSD -- It will take a long time before progress goes too far! To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message