Re: partially encrypted filesystem

From: "Jörn Engel" <joern@wohnheim.fh-wedel.de>
To: Kallol Biswas <kbiswas@neoscale.com>
Cc: linux-kernel@vger.kernel.org,
	"linux-fsdevel@vger.kernel.org" <linux-fsdevel@vger.kernel.org>
Subject: Re: partially encrypted filesystem
Date: Wed, 3 Dec 2003 22:44:43 +0100	[thread overview]
Message-ID: <20031203214443.GA23693@wohnheim.fh-wedel.de> (raw)
In-Reply-To: <1070485676.4855.16.camel@nucleon>

On Wed, 3 December 2003 13:07:56 -0800, Kallol Biswas wrote:
> 
> Hello,
>       We have a requirement that a filesystem has to support
> encryption based on some policy. The filesystem also should be able 
> to store data in non-encrypted form. A search on web shows a few 
> encrypted filesystems like "Crypto" from Suse Linux, but we need a
> system  where encryption will be a choice per file. We have a hardware
> controller to apply encryption algorithm. If a filesystem provides hooks
> to use a hardware controller to do the encryption work then the cpu can
> be freed from doing the extra work.
> 
> Any comment on this?

Haven't heard about anything working yet, but it shouldn't be too hard
to change something existing.  For jffs2, I would guesstimate one or
two month to add the necessary bits, but jffs2 is not first choice as
a hard drive filesystem.  Not sure about other filesystems.

Jörn

-- 
Geld macht nicht glücklich.
Glück macht nicht satt.