Re: issue-25

Mike,
   I am not sure that I understand your proposal, but it looks like you are
trying to (mis-)use the If-Modified-Since header in conjunction with a
small (improper) ETag value to forge a unique identifier.  Is that right?
How is that an improvement?  Do you expect that those values will be
maintained in the browsers for more than 6-months?

--ronan


On Thu, Jul 18, 2013 at 4:42 PM, Mike O'Neill
<michael.oneill@baycloud.com>wrote:

> Hi Ronan,****
>
> ** **
>
> I had another thought about frequency capping. If you use the
> ETag/If-None-Match to contain a low entropy count value, 0..7, you could
> combine that with the If-Modified-Since header to give you unique visitor
> detection *and* frequency counting, without a persistent UID in a cookie or
> anywhere else,  and without JS. ****
>
> ** **
>
> You could do that in your 1x1 gif handler and not need the iframe (or the
> v60.js script tag that I notice imrworldwide.com – a Nielsen domain,
>  uses sometimes).****
>
> ** **
>
> If you did that (in the DNT:1 case), you would not need a permitted use. *
> ***
>
> ** **
>
> ** **
>
> Mike****
>
> ** **
>
>
>