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The element identifies a custom security proxy implementation. It allows per-request security checks outside the scope of the EJB declarative security model, without embedding security logic into the EJB implementation. You can use an implementation of the org.jboss.security.SecurityProxy interface. Alternatively, you can use a common interface that uses an object to implement methods in the home, remote, local home, or local interfaces of the EJB. If the given class does not implement the SecurityProxy interface, the instance must be wrapped in a SecurityProxy implementation that delegates the method invocations to the object. The org.jboss.security.SubjectSecurityProxy is an example SecurityProxy implementation used by the default JBossSX installation.