Buckinghamshire CC ANPR cameras
Clive D.W. Feather
clive at davros.org
Mon Jan 9 15:26:18 GMT 2012
Chris Edwards said:
> I guess hashing a registration is pretty easy to reverse. With access to
> the DVLA database of all UK registrations, you simply compute the hash for
> each one. This is a one off task. Once you've done it, you know the
> registration for any given hash.
You don't even need access to the database. The range of possible
registrations isn't that much larger, and it will deal with fake
registrations as well.
(Hmm, how much larger is it? Let's see. The possible registrations are,
aa nnnn, nnnn aa, aaa nnn, nnn aaa, aaa nnn a, a nnn aaa, aa nn aaa
6.25M 6.25M 14.4M 14.4M 302M 302M
The last set is 153M so far, growing at 14.6M per annum. So about 800
million at the moment.]
Clive D.W. Feather | If you lie to the compiler,
Email: clive at davros.org | it will get its revenge.
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