Buckinghamshire CC ANPR cameras

[Peter Fairbrother]

If all they want to do is monitor traffic levels and average journey 
times, then a short - say 10 bit - hash is appropriate. Still not 
private, but it's enough to get the needed data without overly 
complicating things.

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 
available.


-- Peter Fairbrother