From mboxrd@z Thu Jan  1 00:00:00 1970
Return-Path: <arno@wagner.name>
Received: from v6.tansi.org (mail.tansi.org [87.118.116.4])
 by mail.server123.net (Postfix) with ESMTP
 for <dm-crypt@saout.de>; Wed, 30 Mar 2016 20:08:09 +0200 (CEST)
Received: from gatewagner.dyndns.org (77-57-36-72.dclient.hispeed.ch
 [77.57.36.72]) by v6.tansi.org (Postfix) with ESMTPA id 7444520DC13E
 for <dm-crypt@saout.de>; Wed, 30 Mar 2016 20:08:08 +0200 (CEST)
Date: Wed, 30 Mar 2016 20:08:08 +0200
From: Arno Wagner <arno@wagner.name>
Message-ID: <20160330180807.GA25081@tansi.org>
References: <1118698616.11095.1459343934401.JavaMail.zimbra@infodat.com.ar>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <1118698616.11095.1459343934401.JavaMail.zimbra@infodat.com.ar>
Subject: Re: [dm-crypt] Quorum system on decryption passphrase
List-Id: <dm-crypt.saout.de>
List-Unsubscribe: <http://www.saout.de/mailman/options/dm-crypt>,
 <mailto:dm-crypt-request@saout.de?subject=unsubscribe>
List-Archive: <http://www.saout.de/pipermail/dm-crypt/>
List-Post: <mailto:dm-crypt@saout.de>
List-Help: <mailto:dm-crypt-request@saout.de?subject=help>
List-Subscribe: <http://www.saout.de/mailman/listinfo/dm-crypt>,
 <mailto:dm-crypt-request@saout.de?subject=subscribe>
To: dm-crypt@saout.de

Hi FP,

no, you cannot. You can simulate it though:
Say the persons have passphases aaa bbb and ccc.
set-up passphrases aaabbb aaaccc and bbbccc and have a
wrapper-script that concatenates the two inputs from the 
persons and hands it to cryptsetup. (Or use libcruptsetup 
and a C program.)

Regards,
Arno


On Wed, Mar 30, 2016 at 15:18:54 CEST, Fernando D. Pedemonte wrote:
>    Dear List
>    I am trying to setup an encrypted partition, and I requiere 2 people of
>    3 putting a pass-phrase to unlock the device.
>    Is there any way that I can setup in the system to require keys in two
>    different slots to unlock the device?
>    Thanks in advance for your response
>    Best Regards
>    FP-

> _______________________________________________
> dm-crypt mailing list
> dm-crypt@saout.de
> http://www.saout.de/mailman/listinfo/dm-crypt


-- 
Arno Wagner,     Dr. sc. techn., Dipl. Inform.,    Email: arno@wagner.name
GnuPG: ID: CB5D9718  FP: 12D6 C03B 1B30 33BB 13CF  B774 E35C 5FA1 CB5D 9718
----
A good decision is based on knowledge and not on numbers. -- Plato

If it's in the news, don't worry about it.  The very definition of 
"news" is "something that hardly ever happens." -- Bruce Schneier