Buckinghamshire CC ANPR cameras

Roland Perry lists at internetpolicyagency.com
Mon Jan 9 17:32:16 GMT 2012

In article <4F0B222B.9090406 at zen.co.uk>, Peter Fairbrother 
<zenadsl6186 at zen.co.uk> writes
>If the hash function is such that the hash changes say every day, or 
>better for every rush hour, then very little private data would be 

I seems it isn't.

But if one has access to the output data, then it occurs to me that an 
easy attack on the hash function (for a particular plate) would be to 
drive a car, with that as a false numberplate, past a camera at 3am, 
then looking at the results in the morning.
Roland Perry

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