Hi Shachar, 'urban legend' may be a bit strong. The reference I had in mind was http://www.cs.auckland.ac.nz/~pgut001/pubs/secure_del.html which is a bit dated (circa 1996, plus a couple of undated epilogues), but still an interesting read. Of course, if you're going to keep sensitive data on magentic media, it's *much* easier to use an encrypted partition (e.g., dm-crypt <http://www.saout.de/misc/dm-crypt/> http://www.saout.de/misc/dm-crypt/ or TrueCrypt http://www.truecrypt.org/) and securely destroy the keys. Rony
_____ From: linux-il-boun...@cs.huji.ac.il [mailto:linux-il-boun...@cs.huji.ac.il] On Behalf Of Shachar Shemesh Sent: Tuesday, August 18, 2009 5:17 PM To: ro...@acm.org Cc: 'ILUG' Subject: Re: Suggestion for a webmail application with good Hebrew Support ronys wrote: Note that if you're going to dd, at least use if=/dev/urandom. Running dd several (>10) times is best (or using shred(1), which does the same). Rony I am familiar with the urban legend. From what I read about the technique by which you reconstruct older generation data, I'm not sure it would make that much of a difference. Shachar -- Shachar Shemesh Lingnu Open Source Consulting Ltd. http://www.lingnu.com
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