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Re: ISSUE-262: guidance regarding server responses and timing

From: Roy T. Fielding <fielding@gbiv.com>
Date: Fri, 31 Oct 2014 15:17:06 -0700
Cc: "Mike O'Neill" <michael.oneill@baycloud.com>, "Tracking Protection Working Group" <public-tracking@w3.org>
Message-Id: <EBF8F01C-8C51-410F-929B-1AC3D128DB4D@gbiv.com>
To: TOUBIANA Vincent <vtoubiana@cnil.fr>
On Oct 31, 2014, at 1:10 PM, TOUBIANA Vincent wrote:

> The Ad-exchange is sharing the data with third parties and therefore does not respect the DNT signal in the first place. If an Ad-exchange plans to share data about a transaction with a set of third parties it should send a disregard response. I don't see how the "I'm a 1:N gateway" would not be interpreted as "I'm sharing data related to this transaction".

We don't require ISPs and routers to respond to DNT, yet they are sharing
just as much information as an HTTP recipient.  Why?  Because we assume
(incorrectly) that they are service providers for the user agent.  Likewise,
we provide definitions to allow service providers for a given service to
answer on behalf of the owner of that service, because doing so within the
restrictions of a service provider contract makes them no worse for privacy
than interacting with the owner directly.

What Shane has described is a fairly unusual form of service provider
because it is acting on behalf of many parties (most of which are
likely to be third parties, but some might be the first party).
I didn't include that use case in the current design of TPE.
However, it is fair to say that it does exist, and that it won't be
disappearing just because the TPWG finds it inconvenient or even

Our task is therefore to make the use case transparent and to include
enough requirements to make the 1:N gateway capable of communicating
enough of DNT's semantics so that only a deliberately non-conforming
origin server (bidder) would fail to adhere to them.  After all, this
use case only impacts the DNT response, which is largely irrelevant to
users of DNT.

Received on Friday, 31 October 2014 22:17:30 UTC

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