Encryption of files on AIX 5.3 GPFS filesystem

Hi

Are there any tools out there that can encrypt files on a GPFS file system which are being accessed by multiple AIX 5.3 nodes?

Situation, I need various application servers to read/write files that are on a GPFS share. Therefore the encryption mechanisum need to be transparent to the application.

Any ideas?

Moved thread to AIX since it is a bit special.