Article View: alt.linux
Article #186Re: random or urandom???
From: Robert Davies
Date: Tue, 10 Sep 2002 09:29
Date: Tue, 10 Sep 2002 09:29
23 lines
2266 bytes
2266 bytes
Clemens wrote: > dd if=urandom of=/dev/hdb > dd if=random of=/dev/hdb > > I want to overwrite my harddisk with random gibberish. Why not simply mount it as /var/spool/news for a few days? *wink* > What would you adwise, whatοΏ½s more reliable and secure? Actually for your application, wiping a hard disk absolutely clean I assume, it'll be the number of passes that prevent specialist analysis of what was on the disk previously. I would use 'badblocks -p 4 -w /dev/hdb' which makes sure each bit on the drive is flipped multiple times, and then overwrite with /dev/urandom to fill it with gibberish. You should then zero out the first block to create a correct absent partition table. Rob
Technical Details
Message-ID:
<1792356.noMbHg17fY@localhost>Path:
arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!newsfeed.icl.net!newsfeed.fjserv.net!newsfeed.freenet.de!newsfeed.stueberl.de!newspeer1-gui.server.ntli.net!ntli.net!newsfep1-gui.server.ntli.net.POSTED!53ab2750!not-for-mailReferences:
<3d7cd0f2$0$25296$91cee783@newsreader01.highway.telekom.at>Show Full Headers
Complete Article Headers
X-Google-Language: ENGLISH,ASCII X-Google-Thread: 1041dd,28c4c3b7567c439e X-Google-Attributes: gid1041dd,public X-Google-Thread: 111514,28c4c3b7567c439e X-Google-Attributes: gid111514,public X-Google-Thread: 100c5f,28c4c3b7567c439e X-Google-Attributes: gid100c5f,public X-Google-Thread: fc814,28c4c3b7567c439e X-Google-Attributes: gidfc814,public X-Google-Thread: 106e9e,28c4c3b7567c439e X-Google-Attributes: gid106e9e,public X-Google-ArrivalTime: 2002-09-10 03:02:36 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!newsfeed.icl.net!newsfeed.fjserv.net!newsfeed.freenet.de!newsfeed.stueberl.de!newspeer1-gui.server.ntli.net!ntli.net!newsfep1-gui.server.ntli.net.POSTED!53ab2750!not-for-mail Message-ID: <1792356.noMbHg17fY@localhost> From: Robert Davies <Rob_Davies.no_ads_pls@NTLWorld.Com> Subject: Re: random or urandom??? Newsgroups: alt.linux,alt.os.linux.suse,at.tuwien.lva.se-linux,comp.os.linux.security,comp.security Followup-To: alt.linux References: <3d7cd0f2$0$25296$91cee783@newsreader01.highway.telekom.at> Lines: 23 User-Agent: KNode/0.6.1 MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-15 Content-Transfer-Encoding: 8Bit Date: Tue, 10 Sep 2002 10:29:40 +0100 NNTP-Posting-Host: 80.4.136.151 X-Complaints-To: abuse@ntlworld.com X-Trace: newsfep1-gui.server.ntli.net 1031652154 80.4.136.151 (Tue, 10 Sep 2002 11:02:34 BST) NNTP-Posting-Date: Tue, 10 Sep 2002 11:02:34 BST Organization: ntlworld News Service