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Old 11-08-2014, 05:57 AM  
rowan
Too lazy to set a custom title
 
Join Date: Mar 2002
Location: Australia
Posts: 17,393
I capture all HTTP headers on one site that has a high incidence of extended human interaction, in order to research fraud prevention.

In about 5 months it has captured 6402 unique X-UIDH device IDs.

There are other headers that also seem to present a unique device ID. Some of the values even look like they could be phone numbers.

This is just a regular site. I'm not a part of any ad network.
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