A pluggable architecture allows security and business logic plugins to be inserted into a security service hosted by a server, and to control access to one or more secured resources on that server, on another server within the security domain, or between security domains. The security service may act as a focal point for security enforcement, and access rights determination, and information used or determined within one login process can flow transparently and automatically to other login processes. Entitlements denote what a particular user may or may not do with a particular resource, in a particular context. Entitlements reflect not only the technical aspects of the secure environment (the permit or deny concept), but can be used to represent the business logic or functionality required by the server provider. In this way entitlements bridge the gap between a simple security platform, and a complex business policy platform.