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sn said..
On the radio this morning, I heard that the census identity and address info is split off and quarantined so no-one can access it,
However, the same radio report told how the QLD education department used names and addresses supplied in the last census, to cross reference with NAPLAN results so they could track down individual students.
something doesnt sound kosher!!
In one census database:
123456
John Smith
10 Somewhere St
Somewhereville
and in another census database:
123456
Porn Star
$110,000
10/06/1963
Jedi
...or something like that.
I'd hazard a guess that the 123456 unique identifier itself is scrambled/encrypted so
it is different in both databases using one-way encryption. If you have the encryption key you can link the two.
No, it's not perfect. Nothing is.
The thing is your data is currently kept like this for 18 months anyway, more than enough time to get it if you were going to get it.
What they want to do is link your census information to information about you in other databases. This allows researches to look at things from all sorts of angles to find patterns. Often very interesting patterns that tell us a lot about society, how it has changed and possibly predict the future to better manage it.
If it's any reassurance your data is a drop in a vast ocean and researchers are studying tides and wave formations; you're not that important.