Terminus is a secure XML-RPC based system for publishing and accessing the Squeak People accounts and web of trust. With Terminus-Client, you can access the server on people.squeakfoundation.org in order to validate someone's password. If the password validates, you get the user's level back (Observer, Apprentice, Journeyman, Master) which you may use in your application to set access rights.
Terminus clients must be registered before they are allowed access. Registration is through exchange of a DSA public key, see the class comments for details.