Re: [MMUSIC] Feedback requested on requirements - DES F13

Christer Holmberg <christer.holmberg@ericsson.com> Wed, 17 April 2013 11:39 UTC

Return-Path: <christer.holmberg@ericsson.com>
X-Original-To: mmusic@ietfa.amsl.com
Delivered-To: mmusic@ietfa.amsl.com
Received: from localhost (localhost [127.0.0.1]) by ietfa.amsl.com (Postfix) with ESMTP id C2D6F21F8C30 for <mmusic@ietfa.amsl.com>; Wed, 17 Apr 2013 04:39:59 -0700 (PDT)
X-Virus-Scanned: amavisd-new at amsl.com
X-Spam-Flag: NO
X-Spam-Score: -6.249
X-Spam-Level:
X-Spam-Status: No, score=-6.249 tagged_above=-999 required=5 tests=[AWL=0.000, BAYES_00=-2.599, HELO_EQ_SE=0.35, RCVD_IN_DNSWL_MED=-4]
Received: from mail.ietf.org ([12.22.58.30]) by localhost (ietfa.amsl.com [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2I4I3IEalDNm for <mmusic@ietfa.amsl.com>; Wed, 17 Apr 2013 04:39:59 -0700 (PDT)
Received: from mailgw2.ericsson.se (mailgw2.ericsson.se [193.180.251.37]) by ietfa.amsl.com (Postfix) with ESMTP id BCDDB21F8C23 for <mmusic@ietf.org>; Wed, 17 Apr 2013 04:39:58 -0700 (PDT)
X-AuditID: c1b4fb25-b7f366d000004d10-e5-516e8a0d5fa8
Received: from ESESSHC005.ericsson.se (Unknown_Domain [153.88.253.125]) by mailgw2.ericsson.se (Symantec Mail Security) with SMTP id 73.32.19728.D0A8E615; Wed, 17 Apr 2013 13:39:57 +0200 (CEST)
Received: from ESESSMB208.ericsson.se ([169.254.8.70]) by ESESSHC005.ericsson.se ([153.88.183.33]) with mapi id 14.02.0318.004; Wed, 17 Apr 2013 13:39:56 +0200
From: Christer Holmberg <christer.holmberg@ericsson.com>
To: Magnus Westerlund <magnus.westerlund@ericsson.com>, "Dale R. Worley" <worley@ariadne.com>
Thread-Topic: [MMUSIC] Feedback requested on requirements - DES F13
Thread-Index: Ac47XwvLqAipBdx+TBOrEzZ479qZhg==
Date: Wed, 17 Apr 2013 11:39:55 +0000
Message-ID: <7594FB04B1934943A5C02806D1A2204B1C325FB9@ESESSMB208.ericsson.se>
Accept-Language: en-US
Content-Language: en-US
X-MS-Has-Attach:
X-MS-TNEF-Correlator:
x-originating-ip: [153.88.183.20]
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrALMWRmVeSWpSXmKPExsUyM+JvrS5vV16gQc98HYupyx+zWLw8UebA 5DF5/1dmjyVLfjIFMEVx2aSk5mSWpRbp2yVwZbSs/MBYsIW94tKJOSwNjFdYuxg5OSQETCRO LVjCCGGLSVy4t56ti5GLQ0jgMKPEl20H2SGcxYwSU6YvYupi5OBgE7CQ6P6nDdIgIhAvMbN7 AyNImFlAXeLq4iAQU1jASeLyi0qICmeJKZfuMkHYehIzjp4CW8UioCpx5OhyZpByXgFfidn/ LUDCjEAXfD+1BqycWUBc4taT+UwQlwlILNlznhnCFpV4+fgf1PWKElenL4eq15FYsPsTG4St LbFs4Wuwel4BQYmTM5+wTGAUmYVk7CwkLbOQtMxC0rKAkWUVI3tuYmZOernRJkZgqB/c8lt1 B+OdcyKHGKU5WJTEecNdLwQICaQnlqRmp6YWpBbFF5XmpBYfYmTi4JRqYPRyyNt9bvFL020t R9RTVMQSY/duufjLO8txZXvShlLtTo9ME9GXb/2c+V6kJrGLRKqeO3PrptnW94VTpup379Hm j66x7OZzr/HMe39rl8K2R+tenPKyWMedfqTtuHoui9zMBXFHRH7KyE+U2PFOLsO9IzJZ/rM7 n/qVQnd9zs3Su/2CY7l2K7EUZyQaajEXFScCAEatfAxDAgAA
Cc: "mmusic@ietf.org" <mmusic@ietf.org>
Subject: Re: [MMUSIC] Feedback requested on requirements - DES F13
X-BeenThere: mmusic@ietf.org
X-Mailman-Version: 2.1.12
Precedence: list
List-Id: Multiparty Multimedia Session Control Working Group <mmusic.ietf.org>
List-Unsubscribe: <https://www.ietf.org/mailman/options/mmusic>, <mailto:mmusic-request@ietf.org?subject=unsubscribe>
List-Archive: <http://www.ietf.org/mail-archive/web/mmusic>
List-Post: <mailto:mmusic@ietf.org>
List-Help: <mailto:mmusic-request@ietf.org?subject=help>
List-Subscribe: <https://www.ietf.org/mailman/listinfo/mmusic>, <mailto:mmusic-request@ietf.org?subject=subscribe>
X-List-Received-Date: Wed, 17 Apr 2013 11:39:59 -0000

Hi,

>>    DES F13  It is desirable for RTP media to appear on the wire as
>>       (encrypted) SRTP packets and for RTCP reports to appear on the
>>       wire as (authenticated but not encrypted) SRTCP packets.  Thus,
>>       encryption of RTP/RTCP via DTLS and encapsulation of multiplexed
>>       packets is not desirable.
>
> I am not certain I understand the motivations for this requirement. Is the need to having unencrypted RTCP for 
> third party monitors? From a security point of view I see issues with such blanket statements. There can be information 
> in the RTCP that is sensitive for privacy reasons.
>
> For the last sentence are you really meaning DTLS or DTLS-SRTP. There is a big difference here.

I am not sure I understand why this is bundle specific.

If you are talking about a case where RTP and RTCP use the same 5-tuple, that is an rtcpmux (RFC 5761) issue.

Regards,

Christer