Re: [straw] Alissa Cooper's Discuss on draft-ietf-straw-b2bua-dtls-srtp-09: (with DISCUSS and COMMENT)

"Ben Campbell" <ben@nostrum.com> Wed, 23 March 2016 16:45 UTC

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From: Ben Campbell <ben@nostrum.com>
To: Victor Pascual Avila <victor.pascual.avila@gmail.com>
Date: Wed, 23 Mar 2016 11:45:20 -0500
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Cc: Ram Mohan R <rmohanr@cisco.com>, Alissa Cooper <alissa@cooperw.in>, "straw@ietf.org" <straw@ietf.org>, "christer.holmberg@ericsson.com" <christer.holmberg@ericsson.com>
Subject: Re: [straw] Alissa Cooper's Discuss on draft-ietf-straw-b2bua-dtls-srtp-09: (with DISCUSS and COMMENT)
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On 23 Mar 2016, at 11:04, Victor Pascual Avila wrote:

> On Tue, Mar 22, 2016 at 6:16 AM, Ram Mohan R (rmohanr)
> <rmohanr@cisco.com> wrote:
>>>> NEW:
>>>> B2BUAs may be deployed for address hiding or media latching 
>>>> [RFC7362],
>>>> although TURN is more often used for this purpose and media 
>>>> latching
>>>> is not
>>>> recommended due to its security properties. Such B2BUAs are able to
>>>> perform their
>>>> functions without requiring termination of DTLS-SRTP sessions i.e.
>>>> these B2BUAs need not act as DTLS proxy and decrypt the RTP 
>>>> payload.
>>>
>>> I think the statement that TURN is more often used for media 
>>> latching is
>>> at least somewhat aspirational. But I'm okay with that aspiration 
>>> :-)
>>
>> :) Agree. There are more B2BUAs out there in field doing latching 
>> than
>> people using TURN.
>> But I think there is no harm in saying this way.
>
> How about something like the following: "B2BUAs may be deployed for
> address hiding or media latching [RFC7362], although TURN (and ICE) is
> expected to be used more often for this purpose as it provides better
> security properties"

I would personally be happy with that. The more neutral tone might be 
less off-putting to the target audience.

Alissa, would that work for you?

Ben.