The Distributed feature provides several levels of security protection for distributed applications. Three levels of security are built into the distributed feature: basic authorization, password-based client authentication, and mutual password-based authentication. In addition, on OS/2 only, external security is provided through the Generic Security Services (GSS) API.

At this time, SST does not provide any built-in security protection. You can implement your own security through object space connection callbacks and through extensions to the marshaling framework.