psftp and AES

Hi all,

As part of an AES implementation, I'm redesigning an FTP process
(starting by selecting a new client). I found psFTP, made by same
people as PuTTY. It seems to be very easy to use, my only issue is
that documentation is scarce. What I'm looking for specifically, is
what encryption algorithms psFTP supports. It is required that we
implement AES on the wire for the FTP transmission, so I really need to
know if psFTP has that capability.

Any help would be appreciated...

TIA,
//NC