2010/5/4 Alvaro Herrera <alvherre@commandprompt.com>:
> Vincenzo Romano wrote:
>> Hi all.
>>
>> I'm willing to change an BIGINT ID column (actually a SERIAL8) with a
>> BIGINT whose valules are (pseudo)random.
>> The main objective is to avoid guessability.
>> I whish I could also use it as the PK (as it's now) but that's not
>> really important now.
>> Any hint?
>
> http://wiki.postgresql.org/wiki/Pseudo_encrypt
That's a nice starting point.
I should apply that function twice for each 32-bit chunk of a
64-bit BIGINT and then merge the results into a single BIGINT ...
Boring but doable!
--
Vincenzo Romano
NotOrAnd Information Technologies
NON QVIETIS MARIBVS NAVTA PERITVS