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Re: [alto] Eric Rescorla's Discuss on draft-ietf-alto-multi-cost-08: (with DISCUSS)

"Randriamasy, Sabine (Nokia - FR/Nozay)" <sabine.randriamasy@nokia-bell-labs.com> Tue, 25 April 2017 17:49 UTC

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From: "Randriamasy, Sabine (Nokia - FR/Nozay)" <sabine.randriamasy@nokia-bell-labs.com>
To: Eric Rescorla <ekr@rtfm.com>
CC: The IESG <iesg@ietf.org>, "draft-ietf-alto-multi-cost@ietf.org" <draft-ietf-alto-multi-cost@ietf.org>, "alto-chairs@ietf.org" <alto-chairs@ietf.org>, "ietf@j-f-s.de" <ietf@j-f-s.de>, "alto@ietf.org" <alto@ietf.org>
Thread-Topic: Eric Rescorla's Discuss on draft-ietf-alto-multi-cost-08: (with DISCUSS)
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Date: Tue, 25 Apr 2017 17:49:02 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/alto/dOBUSZHLfmC-jAWatGDCDtMmYCQ>
Subject: Re: [alto] Eric Rescorla's Discuss on draft-ietf-alto-multi-cost-08: (with DISCUSS)
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Thanks a lot,
Sabine


From: Eric Rescorla [mailto:ekr@rtfm.com]
Sent: 25 April 2017 19:44
To: Randriamasy, Sabine (Nokia - FR/Nozay) <sabine.randriamasy@nokia-bell-labs.com>
Cc: The IESG <iesg@ietf.org>; draft-ietf-alto-multi-cost@ietf.org; alto-chairs@ietf.org; ietf@j-f-s.de; alto@ietf.org
Subject: Re: Eric Rescorla's Discuss on draft-ietf-alto-multi-cost-08: (with DISCUSS)

Thanks. I have removed my discuss.

-Ekr


On Tue, Apr 25, 2017 at 10:36 AM, Randriamasy, Sabine (Nokia - FR/Nozay) <sabine.randriamasy@nokia-bell-labs.com<mailto:sabine.randriamasy@nokia-bell-labs.com>> wrote:
Hello Eric,

Thanks a lot for your feedback and suggested text on privacy or security issues.
I have added it to section 7 "Privacy And Security Considerations" of the draft update that has
just been posted and can be found at https://tools.ietf.org/html/draft-ietf-alto-multi-cost-09 .

Best regards,
Sabine


>>-----Original Message-----
>>From: Eric Rescorla [mailto:ekr@rtfm.com<mailto:ekr@rtfm.com>]
>>Sent: 12 April 2017 01:02
>>To: The IESG <iesg@ietf.org<mailto:iesg@ietf.org>>
>>Cc: draft-ietf-alto-multi-cost@ietf.org<mailto:draft-ietf-alto-multi-cost@ietf.org>; Jan Seedorf <ietf@j-f-s.de<mailto:ietf@j-f-s.de>>; alto-
>>chairs@ietf.org<mailto:chairs@ietf.org>; ietf@j-f-s.de<mailto:ietf@j-f-s.de>; alto@ietf.org<mailto:alto@ietf.org>
>>Subject: Eric Rescorla's Discuss on draft-ietf-alto-multi-cost-08: (with
>>DISCUSS)
>>
>>Eric Rescorla has entered the following ballot position for
>>draft-ietf-alto-multi-cost-08: Discuss
>>
>>When responding, please keep the subject line intact and reply to all email
>>addresses included in the To and CC lines. (Feel free to cut this introductory
>>paragraph, however.)
>>
>>
>>Please refer to https://www.ietf.org/iesg/statement/discuss-criteria.html
>>for more information about IESG DISCUSS and COMMENT positions.
>>
>>
>>The document, along with other ballot positions, can be found here:
>>https://datatracker.ietf.org/doc/draft-ietf-alto-multi-cost/
>>
>>
>>
>>----------------------------------------------------------------------
>>DISCUSS:
>>----------------------------------------------------------------------
>>
>>This document states:
>>"This document does not introduce any privacy or security issues not
>>   already present in the ALTO protocol."
>>
>>This may be true, but it's not obvious it is, because when questions are asked
>>together, that's more of a privacy signature than independently.
>>So, suppose that application A asks for metric A and application B asks for
>>metric B and application C asks for A and B. If these applications are mixed
>>behind a CGN, with single queries then you don't know whether you have
>>some A clients and some B clients, but if you do multi-query, it's clear these
>>are C clients. This is a potentially serious issue if (for instance) Bittorrent
>>always asks for a very distinguished set of parameters, so an ALTO server
>>might use this to find Bittorrent clients.
>>
>>
>>

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