I do have similar requirement. I have a student website say site A(.NET) and a moodle website say site B. When the student is created in the site A, it will be synchronised in site B. Same data will be available both in A and B. Synchronisation is already done and working well.
Now, my requirement is, my login should be only in sita A. I login to site A, I have a link to site B. When I click on the link I should be automatically logged into the site B.
I do not have any LDAP, also my site A is a simple student website created using .Net with no standand SSO plugins etc. In this case, how can i do SSO to Moodle website using webservice?