Bugtraq mailing list archives
Re: Peter Gutmann data deletion theaory?
From: Jake Appelbaum <jacob () appelbaum net>
Date: Sat, 23 Jul 2005 12:18:55 -0700
On Fri, 2005-07-22 at 15:01 +0200, "Vincent DUVERNET (Nolmë Informatique)" wrote:
every body speaks about hardware & the best way for datas to be unrecoverable. Where states can use eletron microcope or other great machines, data encryption like EFS is another way to reinforce security no ?
If you don't want someone to be able to read your data, the best choice is to encrypt it before it reaches the storage medium. Then destroy the platters or wipe them or whatever feel good plan you have. Something like loop-aes in linux or gbde in freebsd does that on the software side (loop-aes even does in memory encryption key scrubbing [1]). If you want something kept secret, loop-aes and gbde are your best bets for offline security even before you've tried to destroy the data. Sometimes you don't get a chance to destroy your cache of drives in the closet before someone gets them. It's obviously a choice about the threat model. With laptops it seems like an obvious choice. Sometimes the performance hit isn't worth it but for mobile devices and other high theft devices, it seems like unless your data is worthless, you should encrypt it. [1]: "Loop encryption key scrubbing moves and inverts key bits in kernel RAM so that the thin oxide which forms the storage capacitor dielectric of DRAM cells is not permitted to develop detectable property." -- Jake Appelbaum <jacob () appelbaum net>
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Current thread:
- Peter Gutmann data deletion theaory? Jared Johnson (Jul 21)
- RE: Peter Gutmann data deletion theaory? Barbara Lockwood (Jul 21)
- RE: Peter Gutmann data deletion theaory? Tiago Halm (Jul 22)
- Re: Peter Gutmann data deletion theaory? Jay D. Dyson (Jul 21)
- Re: Peter Gutmann data deletion theaory? Thor (Hammer of God) (Jul 22)
- Re: Peter Gutmann data deletion theaory? Simple Nomad (Jul 21)
- Re: Peter Gutmann data deletion theaory? Volker Tanger (Jul 22)
- Re: Peter Gutmann data deletion theaory? Alexander L. Ivanchev (Jul 27)
- Re: Peter Gutmann data deletion theaory? Casper . Dik (Jul 27)
- Re: Peter Gutmann data deletion theaory? Vincent DUVERNET (Nolmë Informatique) (Jul 22)
- Re: Peter Gutmann data deletion theaory? Jake Appelbaum (Jul 27)
- RE: Peter Gutmann data deletion theaory? Jared Johnson (Jul 22)
- Re: Peter Gutmann data deletion theaory? Volker Tanger (Jul 22)
- RE: Peter Gutmann data deletion theaory? D. Weiss (Jul 22)
- Re: Peter Gutmann data deletion theaory? Dana Hudes (Jul 22)
- Re: [BugTraq] Peter Gutmann data deletion theaory? Robin Whittle (Jul 22)
- Re: [BugTraq] Peter Gutmann data deletion theaory? Volker Kuhlmann (Jul 27)
- RE: Peter Gutmann data deletion theaory? dave kleiman (Jul 27)
- <Possible follow-ups>
- RE: Peter Gutmann data deletion theaory? Jeremy Epstein (Jul 21)
- RE: Peter Gutmann data deletion theaory? Glenn.Everhart (Jul 21)
- Re: RE: Peter Gutmann data deletion theaory? underwood-de (Jul 22)
- Re: RE: Peter Gutmann data deletion theaory? Ron van Daal (Jul 27)
(Thread continues...)
- RE: Peter Gutmann data deletion theaory? Barbara Lockwood (Jul 21)