From: Arno Wagner <arno@wagner.name>
To: dm-crypt@saout.de
Subject: Re: [dm-crypt] LUKS and LVM
Date: Sat, 19 Feb 2011 20:08:58 +0100 [thread overview]
Message-ID: <20110219190858.GA6981@tansi.org> (raw)
In-Reply-To: <4D5FF3CC.6010804@gmail.com>
On Sat, Feb 19, 2011 at 09:46:04AM -0700, Nicolas Bock wrote:
>
>
> On 02/18/11 13:07, Arno Wagner wrote:
> > (I use plain dm-crypt
> >>> with a random password and overwrite with conventional,
> >>> mt19997-generated randomness).
>
>
> Why use random data to overwrite? Shouldn't /dev/zero be enough since
> the crypto should produce good randomness on disk?
It is only marginally slower this way and there may be issues
with initialisation vectors in disk encryption. There are
no that I know of with the current cryptsetup defaults. This
is just a very cheap additional layer of protection.
Arno
--
Arno Wagner, Dr. sc. techn., Dipl. Inform., CISSP -- Email: arno@wagner.name
GnuPG: ID: 1E25338F FP: 0C30 5782 9D93 F785 E79C 0296 797F 6B50 1E25 338F
----
Cuddly UI's are the manifestation of wishful thinking. -- Dylan Evans
If it's in the news, don't worry about it. The very definition of
"news" is "something that hardly ever happens." -- Bruce Schneier
next prev parent reply other threads:[~2011-02-19 19:09 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-18 16:39 [dm-crypt] LUKS and LVM Eric Bauman
2011-02-18 17:33 ` Arno Wagner
2011-02-18 17:53 ` Eric Bauman
2011-02-18 19:57 ` Milan Broz
2011-02-18 20:07 ` Arno Wagner
2011-02-19 14:01 ` Eric Bauman
2011-02-19 14:52 ` Arno Wagner
2011-02-19 16:46 ` Nicolas Bock
2011-02-19 17:10 ` Milan Broz
2011-02-19 18:17 ` Jonas Meurer
2011-02-19 19:11 ` Nicolas Bock
2011-02-19 19:10 ` Arno Wagner
2011-02-19 19:08 ` Arno Wagner [this message]
2011-02-19 19:12 ` Nicolas Bock
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20110219190858.GA6981@tansi.org \
--to=arno@wagner.name \
--cc=dm-crypt@saout.de \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox