On Tue, May 25, 2010 at 3:39 PM, Hector Beyers hqbey...@gmail.com wrote:
Hi guys,
(I tried the question in another forum first)
Does someone have any ideas how I can hide data without the meta data
noticing? To explain further, I would like to save some collection of data
where the meta-data does not see it. I am trying to do some security through
obscurity. It is for research purposes.
For example, populate a table with 1000 rows, but the meta-data only knows
of about 500 of them? Only on an export of a dump can you find all the data
again. Or maybe to make a hidden duplicate schema that can point to the
hidden data?
Does someone have any good ideas on how to achieve this or something
similar?
Kind regards
Hector
On Mon, May 24, 2010 at 9:16 PM, Hector Beyers hqbey...@gmail.com wrote:
Hi guys,
does ANYONE have any tips on hiding data on a database server? This means
that data is stored in places that is not necessarily picked up in the
schema of the database. I am doing some research on databases and need some
direction.
Any help or direction will be highly appreciated.
Kind regards
Hector
Not sure if this helpful, but be sure to know about views, which can
be used to filter out rows of a table. Example:
CREATE TABLE foo (name TEXT, visible BOOL);
INSERT INTO foo VALUES ('two', true);
INSERT INTO foo VALUES ('three', true);
INSERT INTO foo VALUES ('four', false);
INSERT INTO foo VALUES ('five', true);
INSERT INTO foo VALUES ('six', false);
INSERT INTO foo VALUES ('seven', true);
INSERT INTO foo VALUES ('eight', false);
INSERT INTO foo VALUES ('nine', false);
INSERT INTO foo VALUES ('ten', false);
INSERT INTO foo VALUES ('eleven', true);
CREATE VIEW foo_view AS SELECT foo.name FROM foo WHERE visible=true;
= SELECT * FROM foo;
name | visible
+-
two| t
three | t
four | f
five | t
six| f
seven | t
eight | f
nine | f
ten| f
eleven | t
(10 rows)
= SELECT * FROM foo_view;
name
two
three
five
seven
eleven
(5 rows)
Note that views are SELECT-only, but you can use CREATE RULE to
simulate an updatable view.
You may also want to read about Veil:
http://veil.projects.postgresql.org/curdocs/main.html
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