Buckinghamshire CC ANPR cameras
tugwilson at gmail.com
Tue Jan 10 13:39:53 GMT 2012
On 10 January 2012 12:43, Clive D.W. Feather <clive at davros.org> wrote:
> John Wilson said:
>> The hash doesn't change over time. There's a FOI response from the
>> Highways Agency which confirms that.
> Actually, it doesn't say that.
> If the person writing the answer thinks of the hash algorithm as being
> based on (say) the date rather than the date being something that's hashed,
> they would have answered the way they did.
The Highways Agency have asid that the hash involves the use of a
prime number. The make no mention of date.
If you used the date you'd losse track of all vehicles at midnight
wich is a pretty bad idea.
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