Performance of column level encryption

Version: IDS 10

We have need to encrypt few columns of the database. One of the
options I looked at was encryption functions provided by informix.
But, when I asked some of the consultant they told us that Informix
has performance issues in using their encryption functions. They
recommend to NOT use informix's encryption function. I wanted to know
if this is the case, and if yes, then is it going to be improved in
next versions of IDS.

.

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