Buckinghamshire CC ANPR cameras
lists at internetpolicyagency.com
Mon Jan 9 16:53:25 GMT 2012
<CAJkBBXVdM41CaWi9dDGouvkft3U9TqkQXkJN7p3Rx0pMYi9iug at mail.gmail.com>,
John Wilson <tugwilson at gmail.com> writes
>It seems clear that this method as a very poor way of anonymising the
>data. If I had access to the data
Which raises the issue of what form of data loss the anonymising process
regards as a threat. Having scooped up all the data form a central store
is not the same as eavesdropping the feed from one camera.
>I could easily identify and
>individual's car with out knowing anything at all about the hash
>function other than it always produces the same hash given the same
>number plate. I just need to know the precise time they pass one or
Although if the camera's on a busy road, you may have several cars to
>or less precise information on several journeys.
Two samples should reduce the number of cars in both places at the same
time to a very small number.
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