secure platform for various appliaction

Hello,

I'm looking for software that allows data encryption beetween
different
applications. For example I have 2 instances of application A that run
over
network (client and server), but unfortunatelly data beteween them is
not
encrypted (lame soft), and I need a platform (OS doesnt make any
difference)
that I could use to secure data exchanged between those two instances.
Can anybody help me ?


best regards,

mwallace