Date: Fri, 19 Nov 1999 16:04:55 +1100 From: Peter Jeremy <jeremyp@gsmx07.alcatel.com.au> To: Barrett Richardson <barrett@phoenix.aye.net> Cc: freebsd-security@FreeBSD.ORG Subject: Re: secure filesystem wiping Message-ID: <99Nov19.155828est.40400@border.alcanet.com.au> In-Reply-To: <Pine.BSF.4.01.9911182331400.18537-100000@phoenix.aye.net> References: <38347633.22E76DE0@softweyr.com> <Pine.BSF.4.01.9911182331400.18537-100000@phoenix.aye.net>
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On 1999-Nov-19 15:37:34 +1100, Barrett Richardson wrote: >How about pseudo-random data? Aren't the passes with random data just >a little extra icing? As I understand the recovery techniques, it's irrelevant because the difference between the current data and the previous generation is quite clear (otherwise the normal read wouldn't work). This means you can immediately extract the pattern used to perform the over-write (whatever it is) and subtract an idealised version of it to leave you with the underlying data/ >Also, will my system choke if I mmap a 250 MB file on a system >with 32 MB of ram? Nope. Peter To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-security" in the body of the message
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