From: Christoph Anton Mitterer <calestyo@scientia.net>
To: linux-btrfs@vger.kernel.org
Subject: Re: [RFC PATCH] Btrfs: add sha256 checksum option
Date: Tue, 02 Dec 2014 01:28:34 +0100 [thread overview]
Message-ID: <1417480114.12583.2.camel@scientia.net> (raw)
In-Reply-To: <CAJBj3vd5tY93jkN7S25Am=c1A5iW=msqFDrOe-i9vYx9Phxwcg@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 763 bytes --]
On Sat, 2014-11-29 at 13:00 -0800, John Williams wrote:
> On Sat, Nov 29, 2014 at 12:38 PM, Alex Elsayed <eternaleye@gmail.com> wrote:
> > Why not just use the kernel crypto API? Then the user can just specify any
> > hash the kernel supports.
>
> One reason is that crytographic hashes are an order of magnitude
> slower than the fastest non-cryptographic hashes. And for filesystem
> checksums, I do not see a need for crypotgraphic hashes.
I'm not that crypto expert, but wouldn't the combination of a
cryptographic hash, in combination with e.g. dm-crypt below the
filesystem give us what dm-crypt alone cannot really give us
(authenticated integrity)?
Would that combination of hash+encrypt basically work like a MAC?
Cheers,
Chris.
[-- Attachment #2: smime.p7s --]
[-- Type: application/x-pkcs7-signature, Size: 5313 bytes --]
next prev parent reply other threads:[~2014-12-02 0:28 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-24 5:23 [RFC PATCH] Btrfs: add sha256 checksum option Liu Bo
2014-11-24 5:23 ` [RFC PATCH] Btrfs-progs: support sha256 checksum algorithm Liu Bo
2014-11-24 8:23 ` [RFC PATCH] Btrfs: add sha256 checksum option Holger Hoffstätte
2014-11-24 18:55 ` Duncan
2014-11-24 19:34 ` John Williams
2014-11-25 10:30 ` Liu Bo
2014-11-25 10:52 ` Daniel Cegiełka
2014-11-25 23:17 ` John Williams
2014-11-26 12:50 ` Holger Hoffstätte
2014-11-26 17:53 ` John Williams
2014-11-25 10:28 ` Liu Bo
2014-11-24 20:07 ` Chris Mason
2014-11-24 20:58 ` Hugo Mills
2014-11-25 3:04 ` Qu Wenruo
2014-11-25 5:13 ` Zygo Blaxell
2014-11-25 11:30 ` Liu Bo
2014-11-26 13:36 ` Brendan Hide
2014-11-25 16:47 ` David Sterba
2014-11-25 19:45 ` Bardur Arantsson
2014-11-26 13:38 ` Brendan Hide
2014-11-26 13:58 ` Austin S Hemmelgarn
2014-12-01 18:37 ` David Sterba
2014-12-01 20:35 ` Austin S Hemmelgarn
2014-12-01 20:51 ` John Williams
2014-12-01 23:23 ` Alex Elsayed
2014-12-15 18:47 ` David Sterba
2014-11-25 16:39 ` David Sterba
2014-11-27 3:52 ` Liu Bo
2014-12-01 18:51 ` David Sterba
2014-11-29 20:38 ` Alex Elsayed
2014-11-29 21:00 ` John Williams
2014-11-29 21:07 ` Alex Elsayed
2014-11-29 21:21 ` John Williams
2014-11-29 21:27 ` Alex Elsayed
2014-12-01 12:39 ` Austin S Hemmelgarn
2014-12-01 17:22 ` John Williams
2014-12-01 17:42 ` Austin S Hemmelgarn
2014-12-01 17:49 ` John Williams
2014-12-01 19:28 ` Alex Elsayed
2014-12-01 19:34 ` Alex Elsayed
2014-12-01 20:26 ` Austin S Hemmelgarn
2014-12-01 19:58 ` John Williams
2014-12-01 20:04 ` Alex Elsayed
2014-12-01 20:08 ` Alex Elsayed
2014-12-01 20:46 ` John Williams
2014-12-01 22:56 ` Alex Elsayed
2014-12-01 23:05 ` Alex Elsayed
2014-12-01 23:37 ` John Williams
2014-12-01 23:46 ` Alex Elsayed
2014-12-02 0:03 ` John Williams
2014-12-02 0:15 ` Alex Elsayed
2014-12-02 0:30 ` John Williams
2014-12-02 0:34 ` Alex Elsayed
2014-12-02 0:11 ` John Williams
2014-12-01 23:48 ` John Williams
2014-12-02 0:06 ` Alex Elsayed
2014-12-02 0:10 ` Alex Elsayed
2014-12-02 0:16 ` John Williams
2014-12-02 0:28 ` Christoph Anton Mitterer [this message]
2014-12-02 0:43 ` Alex Elsayed
2014-12-02 0:53 ` Christoph Anton Mitterer
2014-12-02 1:25 ` Alex Elsayed
2014-12-02 1:32 ` Alex Elsayed
2014-11-30 22:51 ` Christoph Anton Mitterer
2014-11-30 22:59 ` Christoph Anton Mitterer
2014-11-30 23:05 ` Dimitri John Ledkov
2014-12-01 2:55 ` Christoph Anton Mitterer
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=1417480114.12583.2.camel@scientia.net \
--to=calestyo@scientia.net \
--cc=linux-btrfs@vger.kernel.org \
/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 an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.