Re: Status of Privacy Extensions for Stateless Address Autoconfiguration in IPv6

Fernando Gont <fernando@gont.com.ar> Thu, 02 April 2020 12:40 UTC

Return-Path: <fernando@gont.com.ar>
X-Original-To: ipv6@ietfa.amsl.com
Delivered-To: ipv6@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id F29B33A116A for <ipv6@ietfa.amsl.com>; Thu, 2 Apr 2020 05:40:19 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -1.899
X-Spam-Level:
X-Spam-Status: No, score=-1.899 tagged_above=-999 required=5 tests=[BAYES_00=-1.9, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001] autolearn=ham autolearn_force=no
Received: from mail.ietf.org ([4.31.198.44]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id j3zfGZEUA68K for <ipv6@ietfa.amsl.com>; Thu, 2 Apr 2020 05:40:18 -0700 (PDT)
Received: from fgont.go6lab.si (fgont.go6lab.si [91.239.96.14]) (using TLSv1.2 with cipher ADH-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ietfa.amsl.com (Postfix) with ESMTPS id D64113A1151 for <ipv6@ietf.org>; Thu, 2 Apr 2020 05:40:17 -0700 (PDT)
Received: from [192.168.0.10] (unknown [181.45.84.85]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by fgont.go6lab.si (Postfix) with ESMTPSA id 741E589386; Thu, 2 Apr 2020 14:40:15 +0200 (CEST)
Subject: Re: Status of Privacy Extensions for Stateless Address Autoconfiguration in IPv6
To: Alexandre Petrescu <alexandre.petrescu@gmail.com>, ipv6@ietf.org
References: <02C1F5E2-2CA6-4555-8623-D11E82A0B4E7@gmail.com> <b36015ea-6de5-f562-1328-0a047b1ad6ee@gmail.com> <2931a700-51e9-88bf-a3a6-113b3bdeaaa4@gmail.com> <007cd7e4-6a37-604b-2c25-940cfb2f0e79@si6networks.com> <aec5b715-8690-1922-8ec1-90b9de5a53a7@gmail.com> <0c6cd194-82d3-9b46-62a6-5aed9ee17715@gmail.com>
From: Fernando Gont <fernando@gont.com.ar>
Message-ID: <898c6a5b-2bf5-3bc0-f716-41f6e0ac60d9@gont.com.ar>
Date: Thu, 02 Apr 2020 09:39:27 -0300
User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.9.1
MIME-Version: 1.0
In-Reply-To: <0c6cd194-82d3-9b46-62a6-5aed9ee17715@gmail.com>
Content-Type: text/plain; charset="utf-8"; format="flowed"
Content-Language: en-US
Content-Transfer-Encoding: 8bit
Archived-At: <https://mailarchive.ietf.org/arch/msg/ipv6/zbAAa5tmlx3pnstG2L5Ln0gnmtY>
X-BeenThere: ipv6@ietf.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: "IPv6 Maintenance Working Group \(6man\)" <ipv6.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/ipv6>, <mailto:ipv6-request@ietf.org?subject=unsubscribe>
List-Archive: <https://mailarchive.ietf.org/arch/browse/ipv6/>
List-Post: <mailto:ipv6@ietf.org>
List-Help: <mailto:ipv6-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/ipv6>, <mailto:ipv6-request@ietf.org?subject=subscribe>
X-List-Received-Date: Thu, 02 Apr 2020 12:40:23 -0000

On 2/4/20 09:25, Alexandre Petrescu wrote:
> would it it be possible to specify this:
>> However, the method discussed in
>>           this document could be employed for generating Interface IDs
>>           of any arbitrary length, albeit at the expense of reduced
>>           entropy (when employing Interface IDs smaller than 64 bits) 
>> or enhanced entropy (when IID len longer than 64)
> 
> (note 'IID longer than 64')

Not sure what you mean.
1) That's of course implied
2) 2**64 is enough entropy for this kind of thing. Why would anyone do 
that??

I miss the point you are trying to make...

Thanks,
-- 
Fernando Gont
e-mail: fernando@gont.com.ar || fgont@si6networks.com
PGP Fingerprint: 7809 84F5 322E 45C7 F1C9 3945 96EE A9EF D076 FFF1