I have a encrypted column use encrypt function.
Querying against this column is almost not acceptable – returning 12 rows took 25,908 ms.
The query was simply Select decrypt(phn_phone_enc) FROM phn WHERE decrypt(phn_phone_enc,’xxx’,’xxx’) LIKE ‘123%’
So I built index like: CREATE INDEX idx_phn_phone_dec ON phn (decrypt(phn_phone_enc, ‘xxx’, ‘xxx’))
This returns 12 rows in 68 ms.
Would this be the solution for the fast encrypted field search or does this raise the security issue?
Kindest regards,
Naoko Reeves
