linux-kernel - RE: Using dm-crypt for encrypting files

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Message-ID: <26291.193.171.152.33.1172643093.squirrel@webmail.marek.priv.at>
Date:	Wed, 28 Feb 2007 07:11:33 +0100 (CET)
From:	"Ph. Marek" <philipp@...ek.priv.at>
To:	rol@...917.net
Cc:	linux-kernel@...r.kernel.org
Subject: RE: Using dm-crypt for encrypting files

> Hello,
>> - encrypts new files depending on their filename, and generally
>
> What about renaming a file ???
Well, that's a small (but known!) problem with this scheme.
If you say that everything below a directory "_crypt_" should be
encrypted, and just move files in there, you've got no problems - the
encryption settings stay the same.

If you move in/out of encrypted storage, there's two options:
- if it's a separate filesystem, ie. mounted, you cannot move - you
  have to copy & delete, which means the data gets correct settings.
- if its not the same filesystem, you might get a wrongly en/decrypted
  file.

But I just saw ecryptfs (http://ecryptfs.sourceforge.net/) - that seems to
do more or less what I need. I'll take a look.


Regards,

Phil



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