Stunnel is what provides a secure communication between the AS/RS server running EMS and Ex Libris' Alma.
For more information, visit the Stunnel page on Ex Libris' Developer Network site.
There is a certificate (pem file) generated through Alma for the AS/RS that needs to reside on the server that has Stunnel running. Be sure to place the pem file in the directory that is storing the config files for Stunnel.
For Example: C:\Program Files (x86)\stunnel\config\
