RE: Why the index is not used ? - Mailing list pgsql-sql

Hi Francisco

    Thank you for your remark. 
    You're right, but it's the only procedure I found to make search on encrypted fields with good response times
(usingindex) !
 

    Regarding access to the file system, our servers are in protected network areas. few people can connect to it.

    it's not the best solution, but we have data encryption needs and good performance needs too. I do not know how to
doit except the specified procedure..
 
    if anyone has any proposals to put this in place, I'm interested.

    Thanks in advance

Best Regards
Didier ROS

-----Message d'origine-----
De : folarte@peoplecall.com [mailto:folarte@peoplecall.com] 
Envoyé : dimanche 7 octobre 2018 17:58
À : ROS Didier <didier.ros@edf.fr>
Cc : pavel.stehule@gmail.com; pgsql-sql@lists.postgresql.org; pgsql-performance@lists.postgresql.org;
pgsql-general@lists.postgresql.org
Objet : Re: Why the index is not used ?

ROS:

On Sun, Oct 7, 2018 at 3:13 PM, ROS Didier <didier.ros@edf.fr> wrote:
....
> -        INSERT INTO cartedecredit(username,cc)  SELECT 'individu ' || x.id, pgp_sym_encrypt('test value ' || x.id,
'motdepasse','compress-algo=2,cipher-algo=aes256') FROM generate_series(1,100000) AS x(id);
 
> -        CREATE INDEX idx_cartedecredit_cc02 ON cartedecredit(pgp_sym_decrypt(cc, 'motdepasse','compress-algo=2,
cipher-algo=aes256'));

If my french is not too rusty you are encrypting a credit-card, and then storing an UNENCRYPTED copy in the index. So,
gettingit from the server is trivial for anyone with filesystem access.
 

Francisco Olarte.



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