Cryptography limitations in USA

Hi,

I'm responsible for network administration and security in an European company which has begun to open offices in USA. All our european sites are connected through a IPSec VPN. We use 3DES and AES256. As far as I know there are some limitations in the use of algorithms and key lengths in the USA but I don't know where should I check that so I'm not going directly to Guantanamo when I build the network there ;)

Any help on where could I find that information?

Thank you!!!

You might want to read this, and search the ieee site for help =)
http://www.ieeeusa.org/policy/positions/encryption.html

This link might be useful:

http://rechten.uvt.nl/koops/cryptolaw/

:)