GBDE and GELI security
fbsd06 at mlists.homeunix.com
Tue Dec 4 21:47:00 PST 2007
On Tue, 4 Dec 2007 17:04:23 -0700
Chad Perrin <perrin at apotheon.com> wrote:
> I've read reports to the effect that GBDE is vulnerable to online
> dictionary attacks unless two-factor authentication is used. The only
> such report I can find now is this discussion of NetBSD's CGD, where
> its author contrasts it with GBDE:
> Is this still the case? Are there any other security concerns
> related to GBDE's implementation that you might mention? How well
> does GELI stack up against GBDE?
I think it's this:
I don't know much about the internals of GBDE, but if we take his
description of it at face value, it seems to be fair criticism.
I think it's actually saying that GBDE assumes the user will provide
enough user-key entropy, and doesn't do anything to mitigate the use
of weaker passphrases.
Geli uses salt and PKCS #5 so it's pretty much blameless in this area.
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