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Re: DNT ad tag integration

From: Rob van Eijk <rob@blaeu.com>
Date: Thu, 23 Feb 2012 22:59:32 +0100
Message-ID: <4F46B6C4.6060904@blaeu.com>
To: Travis Pinnick <tpinnick@truste.com>, "public-tracking@w3.org" <public-tracking@w3.org>
On 23-2-2012 19:50, Travis Pinnick wrote:
> Per Nick Doty's request, I would like to submit TRUSTe's new 
> integrated DNT ad tag solution for discussion / feedback.
> The concept is a 'smart' ad tag that is capable of acknowledging a 
> user's DNT header and, if DNT is set:
> 1) display an alternate state icon with DNT acknowledgment messaging
> 2) auto set opt-out cookies for ad nets in that particular ad chain
Hi Travis,

I like the idea of chaining the opt-out cookie, but would like to see 
the solution in a live situation. At the moment it only demonstrates the 
capability of distinguishing between a serving a targeted ad and a 
generic ad.

Do I understand you correct and is the idea that it works in the 
following use case? A user visits a site (eg the green node story.nl). 
At that site admeld.com is servicing the add and pings adnxs.com, 
doubleclick.net, 2mdn.net and turn.com, metafiliation.com etc. 
Auto-chaining would result in getting opt-out cookies for all the 
parties involved in the chain.

I hope the opt-out cookies do get an expiration period of 5 years 
minimum. In the EU the opt-out expiration time is very poor and 
inconsistent. I also hope the opt-out cookie content stays generic ie. 
'OPT-OUT' and does not contain a unique identifier.

One privacy risk in I would like to put on the table is connected to the 
dnt_icon.gif. The host from which the dnt_icon.gif is capable of 
generating a log with high behavioral tracking entropy. As long as that 
log is turned off, or has short retention and silod, the risk may be 

Received on Thursday, 23 February 2012 22:00:00 UTC

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