SSO to Member Portal

Aug 7, 2008 at 1:13 PM
I've not ever setup a SSO. 
Requirements are, Client application (that's me) constructs encryped information: client's ID and Member's Info.
Client send URL request to Member Portal (passing via URL).

Encryption Technologies supported for Member Portal:
DES, 2DES, X.509

I'm new at web development and this is my first request for a SSO.
I was instructed to search for some code libraries for RSA encryption and AES encryption.
I've searched, but I have no clue what to do next!

My hardware is windows server 2003, I use dreamweaver to develop web sites.

Please, I realy need help!

How do I begin?