Greetings TC,
Neither MSN Messenger, Windows Messenger or Windows Live Messenger
transfers are encrypted.
Additionally, in later versions of MSN Messenger and Windows Live
Messenger, they have the ability to relay a file through the Messenger
server, without needing a direct connection from you to the contact. So
that also might be a security consideration for you.
--
Jonathan Kay
Microsoft MVP - Windows Live Messenger
MSN Messenger/Windows Messenger
MessengerGeek Blog:
http://www.messengergeek.com
Messenger Resources:
http://messenger.jonathankay.com
(c) 2008 Jonathan Kay - If redistributing, you must include this signature
or citation