Have to design the security for 2 web servers in different locations. The first server authenticates a user and serves and URL, which redirects the user to the second server where content is downloaded. It seems this solution requires session identification, whether included as part of the URL or sent as a secure HTTP cookie in the response header. Is this the best way to authenticate the user on the second system? If so, how would the first system send this session information to the second server to allow authentication to occur? in researching, it seems SOAP calls from the first system to the second may be a way to accomplish this. Obviously, SSL/TLS would be used to encrypt the SOAP calls. Can anyone let me know if this is the correct design of these systems? If not, any other ways?