From owner-freebsd-security Sat Jun 26 14:54:12 1999 Delivered-To: freebsd-security@freebsd.org Received: from alice.gba.oz.au (gba-254.tmx.com.au [203.9.155.254]) by hub.freebsd.org (Postfix) with SMTP id 753AB151BC for ; Sat, 26 Jun 1999 14:54:05 -0700 (PDT) (envelope-from gjb@acm.org) Received: (qmail 8025 invoked by uid 1001); 27 Jun 1999 07:50:27 +1000 Message-ID: <19990626215027.8024.qmail@alice.gba.oz.au> X-Posted-By: GBA-Post 1.03 20-Sep-1998 X-PGP-Fingerprint: 5A91 6942 8CEA 9DAB B95B C249 1CE1 493B 2B5A CE30 Date: Sun, 27 Jun 1999 07:50:26 +1000 From: Greg Black To: Wes Peters Cc: "Crist J. Clark" , freebsd-security@FreeBSD.ORG Subject: Re: Secure Deletion References: <199906250212.WAA07810@cc942873-a.ewndsr1.nj.home.com> <19990625204513.4139.qmail@alice.gba.oz.au> <3773FF9A.6775458D@softweyr.com> In-reply-to: <3773FF9A.6775458D@softweyr.com> of Fri, 25 Jun 1999 16:15:54 CST Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: owner-freebsd-security@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Wes Peters writes: > > 3. newfs the disks and fill them with 0x55 bytes > > 4. repeat step 3, using 0xAA then repeat step 3 > > Oh good grief! If you're going to use the obliterate program I just > mailed out, be sure to edit lines 82 and 90 and change the byte > values to 0xaa and 0x55, because 0xa and 0x5 aren't going to cut > it. ;^) Also note that, if there is a concern with some of the data still exisiting in disk blocks of now deleted files, it's still necessary to apply this overwrite to the whole disk partition. -- Greg Black -- or Fight censorship in Australia: To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message