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Re: Privacy alert: Verizon is now monitoring your mobile Web habits

From: Bjoern Hoehrmann <derhoermi@gmx.net>
Date: Thu, 13 Oct 2011 23:25:00 +0200
To: "Steingruebl, Andy" <asteingruebl@paypal-inc.com>
Cc: "public-privacy (W3C mailing list)" <public-privacy@w3.org>
Message-ID: <b3he97119k3prn3a80u6nog4faim62m1ch@hive.bjoern.hoehrmann.de>
* Steingruebl, Andy wrote:
>Do you know off the top of your head how many people are uniquely
>identifiable by just their zip+4?  Anyone?  I'm not asking in addition
>to other data, just about zip+4 btw.

There seem to be 125 million delivery points, 110 million households, 50
million ZIP+4 codes, and 30 million single person households. There are
around 70 million people who do not use the Internet like toddlers. Then
the upper bound should be somewhere broadly around 20% of the population
and the real figure is probably a low single digit percentage. Estimates
seem to be commercially available, but I couldn't find a proper study.
If the number of total codes is right, the most simplistic estimate is 
50 million codes over 310 people = ~16.13% (all but one code is used to
uniquely identify someone and the rest has the remaining code).
-- 
Björn Höhrmann · mailto:bjoern@hoehrmann.de · http://bjoern.hoehrmann.de
Am Badedeich 7 · Telefon: +49(0)160/4415681 · http://www.bjoernsworld.de
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Received on Thursday, 13 October 2011 21:25:28 GMT

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