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From: Andreas Jellinghaus <aj@dungeon.inka.de>
Subject: Re: Ramdisk encryption
Date: Mon, 19 Jul 2004 22:15:02 +0200
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you are looking for disk encryption.
take a look at dm-crypt. the kernel
will read the encrypted partition, decrypt,
run the software, and if you write data,
before writing it, the kernel will encrypt
it.

you don't need a ramdisk for that.

Andreas